Bell System Circuit Descriptions (CDs and BTs)

Special thanks to the Seattle Connections Museum and John Novack!

Note: Dates, when known, are the most recent in each document package. CDs generally map to SDs. BTs often map to ES, ST, or T diagrams.

Section Date Issue Size Title Included App/Dwg
CD-1A107-015D1.71 MBElectronic Switching Systems - No. 1 - Arranged with 2-Wire and Data Features - Trunk Switching CircuitIss 5D Dwg 16D; App 1B Dwg 17B
CD-1A110-015B243.05 KBElectronic Switching Systems - Common Junctor CircuitIss 5B Dwg 6B; App 1D Dwg 7D; App 2D Dwg 8D; App 3B Dwg 9B; App 4D Dwg 10D
CD-1A140-011D33.61 KBElectronic Switching Systems - No. 1 - Line Insulation Test - Detector CircuitIss 1D Dwg 3D
CD-1A145-011A176.97 KBElectronic Switching Systems - No. 1 - Loop-Around-Test CircuitIss 1A Dwg 2A; App 1D Dwg 3D
CD-1A151-012A778.84 KBElectronic Switching Systems - No. 1 - "TOUCH-TONE" Detector - Test CircuitIss 2A Dwg 5A; App 1B Dwg 6B; App 2D Dwg 7D; App 3AR Dwg 8AR
CD-1A153-017B406.42 KBElectronic Switching Systems - Common - Test Circuit for Ringing and Coin Control CircuitsIss 7B Dwg 19B; App 1B Dwg 20B
CD-1A199-012AC1.66 MBElectronic Switching Systems - No. 1 or 2 Arranged with 2-Wire Features - "TOUCH-TONE" Station Test CircuitIss 2AC Dwg 12AC; App 1B Dwg 13B; App 2B Dwg 14B; App 3A Dwg 15A
CD-1A210-017D588.30 KBElectronic Switching Systems - Common - Remote Master Scanner Applique CircuitIss 7D Dwg 11D; App 1B Dwg 12B; App 2D Dwg 13D; App 3D Dwg 14D
CD-1A246-013B590.22 KBElectronic Switching Systems - Common - MF Receiver CircuitIss 3B Dwg 8B; App 1D Dwg 9D; App 2B Dwg 10B
CD-1A277-012AC1.03 MBElectronic Switching Systems - Common - Dial Tone Delay Alarm CircuitIss 2AC Dwg 5AC; App 1D Dwg 6D; App 2D Dwg 7D; App 3D Dwg 8D
CD-1A277-013B321.73 KBElectronic Switching Systems - Common - Dial Tone Delay Alarm CircuitIss 3B Dwg 10B; App 1D Dwg 11D
CD-1A481-011329.32 KBElectronic Switching Systems - Common - 3A Auxiliary Processor/Peripheral Data Storage Processor (PDSP) Circuit - Application SchematicApp 1D Dwg 2D; App 2AC Dwg 3AC
CD-1C240-024B1.59 MBCommon Systems - Signaling - Application Schematic and Bay Wiring for FU( ) Plus Auxiliary Units for Use in the F Signaling SystemIss 4B Dwg 7B; App 1B Dwg 8B; App 2B Dwg 9B; App 3B Dwg 10B
CD-1C297-019B2.22 MBCommon Systems - Coin Station Test Line Circuit for Use with SXS, No. 1 Crossbar, No. 5 Crossbar, Panel, ESS No. 1 and ESS No. 2 SystemsIss 9B Dwg 19B; App 1B Dwg 20B
CD-1C375-012B1.33 MBCommon Systems - Voice Frequency Transmission - Consolidated Dual F-Signaling and Optional Maintenance Connector Circuit with 4W VF Patch JacksIss 2B Dwg 13B
CD-1C454-012A1.62 MBCommon Systems - Voice Frequency Transmission - Switched Maintenance Access System No. 3A, 3B, 3C and No. 5( ) - Type 2 and 2B Maintenance Connector Circuit and Type 2BX Cord Access Maintenance Connector CircuitIss 2A Dwg 2A; App 1B Dwg 3B; App 2B Dwg 4B; App 3B Dwg 5B; App 4AC Dwg 6AC; App 5D Dwg 7D; App 6D Dwg 8D
CD-1C605-012B973.97 KBCommon Systems - Voice Frequency Transmission - Switched Maintenance Access System No. 3A, 3B, and 3C - Type 3 Maintenance ConnectorIss 2B Dwg 2B; App 1A Dwg 3A; App 2D Dwg 4D; App 3D Dwg 5D
CD-1C605-0211.01 MBCommon Systems - Voice Frequency Transmission - Switched Maintenance Access System No. 3A, 3B, and 3C and No. 5( ) - Type 3 Maintenance Connector CircuitIss 1 Dwg 1; App 1D Dwg 2D; App 2D Dwg 3D; App 3D Dwg 4D
CD-1C900-0111.73 MBCommon System - 3A Central Control CircuitIss 1 Dwg 1; App 1A Dwg 2A; App 2A Dwg 3A; App 3A Dwg 4A; App 4A Dwg 5A; App 5D Dwg 6D; App 6D Dwg 7D
CD-1C901-012D1.27 MBCommon Systems - 3A CC Control Panel CircuitIss 2D Dwg 2D; App 1AR Dwg 3AR; App 2D Dwg 4D
CD-1C902-0313.56 MBCommon Systems - Main Store Controller and Memory CircuitIss 1 Dwg 1
CD-1C903-021892.68 KBCommon Systems - Main Store Memory CircuitIss 1 Dwg 1; App 1D Dwg 2D
CD-1C904-012AC1022.04 KBCommon Systems - Tape Data Controller CircuitIss 2AC Dwg 5AC
CD-1C905-013A2.16 MBCommon Systems - Teletypewriter Controller Unit CircuitIss 3A Dwg 4A; App 1AC Dwg 5AC; App 2A Dwg 6A; App 3AC Dwg 7AC
CD-1C906-012A918.08 KBCommon Systems - System Status Panel CircuitIss 2A Dwg 2A; App 1A Dwg 3A; App 2D Dwg 4D; App 3B Dwg 5B
CD-1C907-012A1.94 MBCommon Systems - System Status Panel Controller CircuitIss 2A Dwg 2A; App 1A Dwg 3A; App 2A Dwg 4A; App 3D Dwg 5D
CD-1C908-012A933.93 KBCommon Systems - System Status Panel Relay CircuitIss 2A Dwg 2A
CD-1C909-012A1.20 MBCommon Systems - Maintenance Frame Power CircuitIss 2A Dwg 2A; App 1A Dwg 3A; App 2A Dwg 4A; App 3B Dwg 5B
CD-1C910-0212.16 MBCommon Systems - Processor Frame Circuit Arranged for No. 2B or 3 ESSIss 1 Dwg 1; App 10B Dwg 11B; App 1A Dwg 2A; App 2D Dwg 3D; App 3B Dwg 4B; App 4A Dwg 5A; App 5D Dwg 6D; App 6B Dwg 7B; App 7B Dwg 8B; App 8A Dwg 9A; App 9B Dwg 10B
CD-1C911-0211.39 MBCommon Systems - Processor Frame Power CircuitIss 1 Dwg 1
CD-1C912-013B980.10 KBCommon Systems - Maintenance Frame Circuit Arranged for ESS No. 2B and 3Iss 3B Dwg 11B; App 1B Dwg 12B; App 2BU Dwg 13BU; App 3B Dwg 14B; App 4B Dwg 15B
CD-1C913-012A1.70 MBCommon Systems - Electronic Remreed Pulser CircuitIss 2A Dwg 2A; App 1A Dwg 3A; App 2AR Dwg 4AR; App 3AC Dwg 5AC; App 4A Dwg 6A; App 5A Dwg 7A
CD-1D243-013B11.40 MBData Systems - Station - Data Set 202T Type - 39A1 Data Mounting and 40B1 Data MountingIss 3B1 Dwg 6B1
CD-1D295-012A392.28 KBData Systems - Station - 63 and 64 Type Data MountingsIss 2A Dwg 2A; App 1B Dwg 3B; App 2A Dwg 4A; App 3B Dwg 5B
CD-1E046-0112.55 MBPBX Systems - No. 551A, B, 552B, D, E, 555, 556A, 605A, 608A, B, D - Manual PBX Access Line with E and M Lead SignalingIss 1 Dwg 1; App 1A Dwg 2A; App 2B Dwg 3B; App 3B Dwg 4B
CD-1E054-013B485.44 KBPBX Systems - Interface Circuit - "TOUCH-TONE" Calling to Dial Pulse ConversionIss 3B Dwg 6B; App 1B Dwg 7B; App 2B Dwg 8B
CD-1H020-013D333.00 KBElectronic Switching Systems - No. 101 - Tone Generators Circuit for Switch UnitIss 3D Dwg I6D; App 1D Dwg 7D
CD-1H021-012D440.50 KBElectronic Switching Systems - No. 101 - Data Link Transfer Circuit for Switch UnitIss 2D Dwg 3D; App 1D Dwg 4D
CD-1H022-015D392.78 KBElectronic Switching Systems - No. 101 - Ringing Generator Circuit for Switch UnitIss 5D Dwg 5D; App 1D Dwg 6D
CD-1P106-014B3.76 MBOperations Support Systems - Common - Switched Maintenance Access System No. 5A - Local Test Port and Distribution CircuitIss 4B Dwg 6B; App 1A Dwg 7A; App 2B Dwg 8B; App 3AC Dwg 9AC
CD-1P107-014A2.53 MBOperations Support Systems - Common - SMAS 5A/B & RTS 5A - Control CircuitIss 4A Dwg 6A; App 10B Dwg 16B; App 1B Dwg 7B; App 2A Dwg 8A; App 3B Dwg 9B; App 4A Dwg 10A; App 5B Dwg 11B; App 6A Dwg 12A; App 7B Dwg 13B; App 8B Dwg 14B; App 9A Dwg 15A
CD-1P108-012A2.35 MBOperations Support Systems - Common - RTS 5A - Remote Test PortIss 2A Dwg 3A; App 1B Dwg 4B; App 2D Dwg 5D; App 3A Dwg 6A; App 4D Dwg 7D
CD-1P109-013B1.85 MBOperations Support Systems - Common - Remote Test System 5A - RTS 5A Frame CircuitIss 3B Dwg 4B; App 1B Dwg 5B; App 2B Dwg 6B; App 3B Dwg 7B; App 4B Dwg 8B; App 5AR Dwg 9AR; App 6B Dwg 10B
CD-1P110-011542.48 KBOperations Support Systems - Common - Switched Maintenance Access System No. 5A - Phantom Maintenance Connector CircuitIss 1 Dwg 1
CD-1P111-011531.20 KBOperations Support Systems - Common - Switched Maintenance Access System No. 5A - Remote Maintenance Loop CircuitIss 1 Dwg 1
CD-1P138-013B1.09 MBOperations Support Systems - Maintenance Connector - Application Schematic for Switched Maintenance Access System (SMAS) 3 and 5Iss 3B Dwg 4B
CD-20127-011928-03-204D245.51 KBPanel System - Test Set Circuit - Tripping Relay Adjusting Set for Use in Offices Using AC-DC RingingIss 4D Dwg 4D
CD-21349-011929-05-202AR282.72 KBPanel System - 2 Wire Recording Completing Trunk Outgoing to Toll Switchboard No. 1 or No. 3 Arranged to Recall the SubscriberIss 2AR Dwg 2AR
CD-25600-0111.40 MBCrossbar Systems - No. 1 - Recorder Circuit for Use in Offices Arranged for Automatic Message AccountingIss 1 Dwg 1
CD-25721-014D180.85 KBCrossbar Systems - No. 5 - Coin Supervisory Concentrating CircuitIss 4D Dwg 12D; App 1B Dwg 13B
CD-25771-013AR848.89 KBCrossbar Systems - No. 5 - Incoming Trunk Test Line CircuitIss 3AR Dwg 4AR; App 1B Dwg 5B; App 2D Dwg 6D; App 3B Dwg 7B; App 4B Dwg 8B; App 5D Dwg 9D; App 6D Dwg 10D; App 7D Dwg 11D
CD-25805-0115B13.64 MBCrossbar Systems - No. 5 - Master Test Frame Connector CktIss 15B Dwg 92B
CD-26026-018D131.95 KBCrossbar Systems - No. 5 - Incoming Register Marker - Connector Circuit - Register Part for DP, MF, RP, and FSP Incoming Registers and CAMA SendersApp 4B Dwg 24B
CD-26042-014D421.50 KBCrossbar Systems - No. 5 - Incoming Register Circuit - MultifrequencyIss 4D Dwg 14D; App 1D Dwg 15D; App 2D Dwg 16D; App 3A Dwg 17A; App 4A Dwg 18A; App 6D Dwg 20D; App 7D Dwg 21D; App 8D Dwg 22D; App 9D Dwg 23D
CD-26077-013D679.01 KBCrossbar Systems - No. 5 - Incoming Trunk Circuit With or Without Tandem Completing Repeated Dialing Using By-Link Reverse Battery SupervisionIss 3D Dwg 15D; App 1B Dwg 16B; App 2B Dwg 17B
CD-26136-012AR942.80 KBCrossbar Systems - No. 5 - Incoming Trunk Circuit From Local Test Desk No. 14, 15B or 16 or Local Test Cabinet No. 3 or Office Test Frame Test Circuit - Dial or Multifrequency PulsingIss 2AR Dwg 5AR; App 1D Dwg 6D; App 2D Dwg 7D
CD-26382-011548.13 KBCrossbar Systems - No. 3 - Line, Line Switch and Connector CircuitIss 1 Dwg 1; App 1B Dwg 2B; App 2D Dwg 3D
CD-26383-012D691.04 KBCrossbar Systems - No. 3 - Trunk Switch and Connector CircuitIss 2D Dwg 2D
CD-26384-0112.96 MBCrossbar Systems - No. 3 - Marker CircuitIss 1 Dwg 1; App 1A Dwg 2A; App 2D Dwg 3D; App 3AC Dwg 4AC
CD-26385-0111.98 MBCrossbar Systems - No. 3 - Originating Register Circuit - Dial Pulsing and "TOUCH-TONE" CallingIss 1 Dwg 1; App 1A Dwg 2A; App 2A Dwg 3A; App 3D Dwg 4D
CD-26386-0112.10 MBCrossbar Systems - No. 3 - Incoming Register Circuit - Multifrequency and Dial Pulsing with Bylink OperationIss 1 Dwg 1; App 1A Dwg 2A; App 2D Dwg 3D
CD-26387-0112.41 MBCrossbar Systems - No. 3 - Outgoing Sender and Connector Circuit - MF and DP OutpulsingIss 1 Dwg 1
CD-26388-011661.47 KBCrossbar Systems - No. 3 - Line Number Translator and Conector CircuitIss 1 Dwg 1; App 1D Dwg 2D
CD-26389-011589.55 KBCrossbar Systems - No. 3 - Master Connector CircuitIss 1 Dwg 1; App 1D Dwg 2D
CD-26390-012D301.83 KBCommon Systems - Voice Alarm and Control CircuitIss 2D Dwg 2D
CD-26391-011261.75 KBCrossbar Systems - No. 3 - Permanent Signal to Operator Plug-Ended Trunk Circuit - E and M Lead SupervisionIss 1 Dwg 1; App 1D Dwg 2D
CD-26392-011582.73 KBCrossbar Systems - No. 3 - Code 911 Emergency Reporting Service - Plug-Ended Trunk Circuit with Ringdown SignalingIss 1 Dwg 1; App 1D Dwg 2D
CD-26393-011709.80 KBCrossbar Systems - No. 3 - Alarm CircuitIss 1 Dwg 1; App 1A Dwg 2A; App 2D Dwg 3D
CD-26394-011479.87 KBCrossbar Systems - No. 3 - Incoming Register Link Circuit - Combined MF, DP and Bylink OperationIss 1 Dwg 1; App 1D Dwg 2D
CD-26395-011399.36 KBCrossbar Systems - No. 3 - Outgoing Sender Link and Trunk Identifier CircuitIss 1 Dwg 1; App 1AR Dwg 2AR
CD-26396-011280.78 KBCrossbar Systems - No. 3 - Permanent Signal to Operator Plug-Ended Trunk Circuit - High-Low SupervisionIss 1 Dwg 1
CD-26397-012AR394.94 KBCrossbar Systems - No. 3 - Intraoffice Plug-Ended Trunk CircuitIss 2AR Dwg 2AR
CD-26398-011322.42 KBCrossbar Systems - No. 3 - Outgoing Plug-Ended Trunk Circuit - Reverse Battery SupervisionIss 1 Dwg 1
CD-26399-011422.91 KBCrossbar Systems - No. 3 - Incoming Plug-Ended Trunk Circuit - Reverse Battery SupervisionIss 1 Dwg 1; App 1B Dwg 2B
CD-26400-011870.06 KBCrossbar Systems - No. 3 - 2-Way Plug-Ended Trunk Circuit for Exchange Use, MF Pulsing - E and M Lead SupervisionIss 1 Dwg 1
CD-26401-011649.21 KBCrossbar Systems - No. 3 - Recording Completing or Special Service Plug-Ended Trunk Circuit - Coin With or Without Non-Coin - High-Low Supervision to Distant Toll SwitchboardIss 1 Dwg 1
CD-26402-011512.92 KBCrossbar Systems - No. 3 - Outgoing Plug-Ended Trunk Circuit - MF Pulsing - Automatic Number Identification - Operator Assistance or Special Toll - High-Low Supervision - Non-CoinIss 1 Dwg 1
CD-26403-011342.83 KBCrossbar Systems - No. 3 - Intercept Trunk Circuit - Plug-EndedIss 1 Dwg 1
CD-26404-011618.46 KBCrossbar Systems - No. 3 - Outgoing Intercept Trunk Circuit - Plug-EndedIss 1 Dwg 1; App 1A Dwg 2A; App 2D Dwg 3D
CD-26405-011224.47 KBCrossbar Systems - No. 3 - Trouble Permanent Signal Overflow Counter CircuitIss 1 Dwg 1
CD-26406-011329.29 KBCrossbar Systems - No. 3 - Miscellaneous Circuit for All FramesIss 1 Dwg 1; App 1D Dwg 2D
CD-26407-011387.52 KBCrossbar Systems - No. 3 - Interrupter Circuit - 60 or 120 IPMIss 1 Dwg 1; App 1A Dwg 2A; App 2D Dwg 3D
CD-26408-011453.26 KBCrossbar Systems - No. 3 - Subscriber Message Register Circuit for Individual or 2-Party LinesIss 1 Dwg 1
CD-26409-011242.69 KBCrossbar Systems - No. 3 - Auxiliary Coin Line CircuitIss 1 Dwg 1; App 1D Dwg 2D; App 2D Dwg 3D; App 3B Dwg 4B
CD-26410-011415.46 KBCrossbar Systems - No. 3 - Incoming Plug-Ended Trunk Circuit - DP or MF Pulsing - Reverse Battery Supervision - In Band Coin ControlIss 1 Dwg 1
CD-26411-012D7.33 MBCrossbar Systems - No. 3 - Test CircuitIss 2D Dwg 7D; App 1AR Dwg 8AR; App 2B Dwg 9B; App 3AR Dwg 10AR; App 4D Dwg 11D; App 5A Dwg 12A
CD-26413-011339.30 KBCrossbar Systems - No. 3 - Incoming Plug-Ended Trunk Circuit From Local Test Desk No. 14, 15B, or 16 or Local Test Cabinet No. 3Iss 1 Dwg 1
CD-26414-011193.57 KBCrossbar Systems - No. 3 - Power, Ringing, and Tone Distributing CircuitIss 1 Dwg 1
CD-26415-011483.69 KBCrossbar Systems - No. 3 - Reverting Call Plug-Ended Trunk Circuit - Superimposed RingingIss 1 Dwg 1
CD-26416-011210.67 KBCrossbar Systems - No. 3 - Outgoing Plug-Ended Trunk Circuit to Information Desk or Repair Service Desk - E and M Lead SupervisionIss 1 Dwg 1; App 1D Dwg 2D
CD-26417-011444.02 KBCrossbar Systems - No. 3 - Incoming Plug-Ended Trunk Circuit - DP or MF Pulsing - E and M Lead SupervisionIss 1 Dwg 1; App 1D Dwg 2D
CD-26418-011505.58 KBCrossbar Systems - No. 3 - Incoming Plug-Ended Trunk Circuit Using Bylink - Reverse Battery or E and M Lead SupervisionIss 1 Dwg 1; App 1D Dwg 2D; App 2D Dwg 3D
CD-26419-011443.70 KBCrossbar Systems - No. 3 - Incoming Plug-Ended Trunk Circuit - No Test - Simplex Controlled Ringing - Reverse Battery or E and M Lead SupervisionIss 1 Dwg 1; App 1B Dwg 2B
CD-26420-011578.07 KBCrossbar Systems - No. 3 - Incoming Plug-Ended Trunk Circuit - DP or MF Pulsing - E and M Lead Supervision - In-Band Coin ControlIss 1 Dwg 1; App 1A Dwg 2A; App 2D Dwg 3D
CD-26422-011313.59 KBCrossbar Systems - No. 3 - Outgoing Plug-Ended Trunk Circuit - Dial Pulsing - E and M Lead SupervisionIss 1 Dwg 1
CD-26423-011469.05 KBCrossbar Systems - No. 3 - Outgoing Plug-Ended Trunk Circuit - MF Pulsing - Automatic Number Identification - Operator Assistance or Special Toll - E and M Lead Supervision - Non-CoinIss 1 Dwg 1; App 1D Dwg 2D
CD-26424-011861.70 KBCrossbar Systems - No. 3 - Outgoing Plug-Ended Trunk Circuit - MF Pulsing - Automatic Number Identification - Multiple Wink or Polar Marginal Coin Signals - High Low Supervision - Coin and Non-CoinIss 1 Dwg 1; App 1B Dwg 2B
CD-26425-011848.10 KBCrossbar Systems - No. 3 - Outgoing Plug-Ended Trunk Circuit - MF Pulsing - Automatic Number Identification - Operator Assistance or Special Toll - E and M Lead Supervision - Coin and Non-Coin - In-Band or Multiple Wink Coin ControlIss 1 Dwg 1; App 1A Dwg 2A; App 2D Dwg 3D
CD-26426-011656.76 KBCrossbar Systems - No. 3 - Recording Completing or Special Service Plug-Ended Trunk Circuit - E and M Lead Supervision - Coin With or Without Non-CoinIss 1 Dwg 1; App 1D Dwg 2D; App 2A Dwg 3A
CD-26427-011344.46 KBCrossbar Systems - No. 3 - Recording Completing or Special Service Plug-Ended Trunk Circuit - Non-Coin - High-Low Supervision to Distant Toll SwitchboardIss 1 Dwg 1
CD-26428-011363.67 KBCrossbar Systems - No. 3 - Recording Completing or Special Service Plug-Ended Trunk Circuit - Non-Coin - E and M Lead SupervisionIss 1 Dwg 1; App 1D Dwg 2D
CD-26429-012D1.08 MBCrossbar Systems - No. 3 - 2-Way Operator Office Plug-Ended Trunk Circuit - E and M Lead Supervision - DP or MF Pulsing - Coin or Non-Coin or Non-Coin Only - In-Band Coin ControlIss 2D Dwg 4D; App 1B Dwg 5B
CD-26430-011815.58 KBCrossbar Systems - No. 3 - 2-Way Plug-Ended Trunk Circuit - Dial Pulsing Using Bylink - E&M Lead SupervisionIss 1 Dwg 1; App 1A Dwg 2D; App 2A Dwg 3A
CD-26431-011371.74 KBCrossbar Systems - No. 3 - Auxiliary Line Circuit for Call-Waiting ServiceIss 1 Dwg 1
CD-26432-011246.95 KBCrossbar Systems - No. 3 - Outgoing Plug-Ended Trunk Circuit - Repair Service Desk No. 2 - High-Low SupervisionIss 1 Dwg 1
CD-26433-011132.18 KBCrossbar Systems - No. 3 - Outgoing Plug-Ended Trunk Circuit to Information Desk - Loop SupervisionIss 1 Dwg 1
CD-26435-012A320.09 KBCommon Systems - 12A Announcement SystemIss 2A Dwg 4A; App 1D Dwg 5D
CD-26436-013D202.68 KBCrossbar Systems - No. 3 - Circuit Pack SchematicsIss 3D Dwg 3D; App 1A Dwg 4A
CD-26437-011306.47 KBCrossbar Systems - No. 3 - Traffic and Plant Register CircuitIss 1 Dwg 1; App 1D Dwg 2D
CD-26439-011239.44 KBCrossbar Systems - No. 3 - Tape Recorder CircuitIss 1 Dwg 1
CD-26441-011250.44 KBCrossbar Systems - No. 3 - Trouble Record Trunk CircuitIss 1 Dwg 1
CD-26442-0111.70 MBCrossbar Systems - No. 3 - Alarm Sending CircuitIss 1 Dwg 1
CD-26443-011290.87 KBCrossbar Systems - No. 3 - Reverting Call Plug-Ended Trunk Circuit for All Negative RingingIss 1 Dwg 1
CD-26445-011483.82 KBCrossbar Systems - No. 3 - Outgoing Plug-Ended Trunk for Use With Automatic Intercept ServiceIss 1 Dwg 1; App 1D Dwg 2D
CD-26446-012D291.16 KBCrossbar Systems - No. 3 - Outgoing Intercept Plug-Ended Trunk to Announcement Machine for Vacant Code or Special AnnouncementsIss 2D Dwg 2D
CD-26447-0111.29 MBCrossbar Systems - No. 3 - 2 Way Plug Ended Trunk Circuit - Dial or Multifrequency Pulsing - Reverse Battery SupervisionIss 1 Dwg 1
CD-26448-0111.44 MBCrossbar Systems - No. 3 - 2-Way Plug-Ended Trunk Circuit - Dial Pulsing Using Bylink - Reverse Battery SupervisionIss 1 Dwg 1
CD-26449-011369.27 KBCrossbar Systems - No. 3 - Emergency Reporting Auxiliary Line Circuit Plug-EndedIss 1 Dwg 1
CD-26450-011222.38 KBCrossbar Systems - No. 3 - Loop and Leak Test CircuitIss 1 Dwg 1
CD-26451-011487.99 KBCrossbar Systems - No. 3 and 5A - Controlled Ferroresonant Rectifier Circuit - Negative 48V DC, 50 Amp - Automatic RegulationIss 1 Dwg 1; App 1D Dwg 2D
CD-26454-012D159.30 KBCrossbar Systems - No. 3 and 5A - Positive and Negative 130 Volt Power Plant Circuit - 6 or 12 Amp Capacity (3 or 6 Amp Per Polarity) Using DC to DC ConvertersIss 2D Dwg 3D
CD-26458-01128.51 KBCrossbar Systems - No. 3 - Circuit Pack Schematics for Ringing and Tone CircuitIss 1 Dwg 1
CD-26462-011275.78 KBCrossbar Systems - No. 3 - Free Number Auxiliary Line Plug-Ended CircuitIss 1 Dwg 1
CD-26465-012D232.20 KBCrossbar Systems - No. 3 - Alarm Transfer and Release Circuit - Plug-EndedIss 2D Dwg 2D
CD-26467-01133.46 KBCrossbar Systems - No. 3 - Connectorized Cabling Diagram - 200-1200 Line ApplicationApp 1D Dwg 2D
CD-26470-011181.84 KBCrossbar Systems - No. 3 - Outgoing Test Trunk Circuit to Local Test Desk No. 14 or 16 or to Local Test Cabinet No. 3Iss 1 Dwg 1
CD-2A022-013AR296.31 KBElectronic Switching Systems - No. 1 Arranged with 4-Wire Features - Code "102" and "106" Test Trunk CircuitIss 3AR Dwg 4AR; App 1A Dwg 5A
CD-2H003-017A761.68 KBElectronic Switching Systems - No. 2 Arranged with 2-Wire Features - Circuit Pack SchematicsIss 7A Dwg 25A
CD-2H192-011721.18 KBElectronic Switching Systems - No. 2 Arranged with 2-Wire Features Processor - DC Power Distribution Circuit for Use with No. 2BIss 1 Dwg 1; App 1A Dwg 2A; App 2D Dwg 3D; App 3D Dwg 4D
CD-2P021-012B2.32 MBOperations Support Systems - Common - E2A Telemetry System - SCC Remote - Application SchematicIss 2B Dwg 2B; App 1A Dwg 3A
CD-2P077-013A737.21 KBOperations Support Systems - Common - Directly Connected Test Unit CircuitIss 3A Dwg 3A; App 10AC Dwg 13AC; App 11A Dwg 14A; App 12A Dwg 15A; App 1B Dwg 4B; App 2B Dwg 5B; App 3A Dwg 6A; App 4B Dwg 7B; App 5B Dwg 8B; App 6A Dwg 9A; App 7AC Dwg 10AC; App 8B Dwg 11B; App 9A Dwg 12A
CD-30200-015D390.52 KBStep by Step Systems - No. 1, 350A or 355A - 3 Wire Selector Circuit for Use as a Local or Incoming Selector or as a Repeated Dialing Toll Train SelectorIss 5D Dwg 24D; App 1D Dwg 25D; App 2D Dwg 26D; App 3D Dwg 27D
CD-30200-023D255.22 KBStep by Step Systems - No. 360A - Local or Incoming Selector CircuitIss 3D Dwg 8D; App 1D Dwg 9D; App 2AR Dwg 10AR; App 3D Dwg 11D
CD-30200-033D272.34 KBStep-by-Step Systems - No. 1 or 350A - Local Selector Circuit Arranged for Sleeve Repeating on Any or All LevelsIss 3D Dwg 4D; App 1D Dwg 5D
CD-30243-015D208.31 KBStep-by-Step Systems - No. 1, 350A, 355A or 35-E-97 - Test Connector Circuit for Use in Testing Subscriber Lines and for Use in Verification ServiceIss 5D Dwg 20D; App 1D Dwg 21D; App 2D Dwg 22D
CD-30868-018B1.07 MBStep by Step Systems - No. 1, 350A, 355A or 35E97 - Rotary Out Trunk Switch Circuit - 3 or 4 Wire Arranged for Pre-SelectionIss 8B Dwg 17B; App 1D Dwg 18D
CD-30868-022B770.75 KBStep by Step Systems - No. 1, 350A, 355A or 35-E-97 - Rotary Out Trunk Switch Circuit - 3 or 4 Wire Arranged for PreselectionIss 2B Dwg 6B; App 1B Dwg 7B; App 2B Dwg 8B
CD-30896-019D899.30 KBStep-by-Step Systems - No. 1 or 350A - Traffic Register CircuitIss 9D Dwg 24D; App 1B Dwg 25B; App 2D Dwg 26D; App 3B Dwg 27B
CD-30903-013B275.55 KBStep by Step Systems - 35-E-97 - Local Connector Circuit - One Ring Generator Connected to Ground or to BatteryIss 3B Dwg 8B
CD-30976-014D660.06 KBStep-by-Step Systems - No. 1, 350A, 355A, 356A or 360A - 3 or 4 Wire Selector Arranged for Peg Count on Cut Thru to Absorb Digits Once Only and/or Repeatedly and to Return Overflow Signal on Specififed Levels - No. 1 or 350A for 2 Party Message Rate Service - No. 355A or 356A Arranged for Timed Release on Permanent SignalIss 4D Dwg 16D; App 1D Dwg 17D; App 2B Dwg 18B; App 3D Dwg 19D; App 4B Dwg 20B; App 5B Dwg 21B; App 6D Dwg 22D; App 7B Dwg 23B
CD-30978-012D479.18 KBStep by Step Systems - No. 1, 350A, 355A or 356A - Selector-Circuit - Reverting Call 8 Party Semi-Selective Ringing and/or 4 Party Selective or Semi-Selective Ringing Arranged for 2 Digit OperationIss 2D Dwg 5D; App 1D Dwg 6D; App 2B Dwg 7B; App 3D Dwg 8D; App 4D Dwg 9D; App 5B Dwg 10B
CD-31237-014D842.17 KBStep by Step System - No. 1, 350A or 355A - Test Trunk Ringing Circuit from Local Test Desk No. 14 or Local Test Cabinet No. 3 - Selective Superimposed RingingIss 4D Dwg 8D; App 1B Dwg 9B; App 2B Dwg 10B; App 3D Dwg 11D; App 4D Dwg 12D; App 5D Dwg 13D
CD-31337-014D324.59 KBStep by Step Systems - No. 1, 350A or 355A - Intercepting Trunk Circuit from Connector or Toll Train Selector Multiple or From Auxiliary Intercepting Trunk for 8 Pty Tpl Connector MultipleIss 4D Dwg 14D; App 1D Dwg 15D
CD-31347-016D1.47 MBTraffic Management Systems - Observing Line Circuit for Use in SXS Line Finder Offices for Observing Originating Service on Subscriber Lines and for Observing on Local Selectors at Central Service Observing DeskIss 6D Dwg 15D; App 1D Dwg 16D; App 2B Dwg 17B; App 3D Dwg 18D; App 4B Dwg 19B; App 5B Dwg 20B; App 6D Dwg 21D
CD-31349-014D700.79 KBStep by Step System - No. 1, 350A or 355A - Test Distributor Control Circuit for Use in Testing Subscriber Lines from Local Test Desk No. 14Iss 4D Dwg 5D; App 1D Dwg 6D; App 2D Dwg 7D; App 3D Dwg 8D; App 4D Dwg 9D; App 5D Dwg 10D
CD-31401-012D852.87 KBStep-by-Step Systems - No. 1 or 350A - Test Distributor Control Circuit for Use in Testing Subscriber Lines from Local Test Desk No. 14 Arranged for Permanent Signal TestsIss 2D Dwg 3D; App 1D Dwg 4D; App 2D Dwg 5D; App 3D Dwg 6D; App 4D Dwg 7D; App 5D Dwg 8D; App 6D Dwg 9D; App 7D Dwg 10D
CD-31401-013B513.38 KBStep-by-Step Systems - No. 1, 350A, 355A or 35E97 - Test Distributor Control Circuit for Use in Testing Subscriber Lines from Local Test Desk No. 14 Arranged for Permanent Signal TestsIss 3B Dwg 12D; App 1D Dwg 13D; App 2D Dwg 14D; App 3D Dwg 15D
CD-31402-011868.34 KBStep-by-Step Systems - No. 1 or 350A - Permanent Signal Test Circuit for Use in Testing Subscriber Lines from Local Test Desk No. 12C or No. 14Iss 1 Dwg 1; App 1D Dwg 2D; App 2D Dwg 3D; App 3D Dwg 4D; App 4B Dwg 5B; App 5D Dwg 6D; App 6D Dwg 7D
CD-31402-012D621.07 KBStep-by-Step Systems - No. 1, 350A, 355A, or 35E97 - Permanent Signal Test Circuit for Use in Testing Subscriber Linefrom Local Test Desk No. 12C or 14Iss 2D Dwg 8D
CD-31592-019D994.90 KBStep by Step Systems - No. 1, 350A, 355A, 360A or 35E97 - Coin Trunk Circuit for Use Preceding a First Selector Serving Prepayment Coin Lines Arranged for Delayed Charging and Overtime ChargingIss 9D Dwg 21D; App 1D Dwg 22D; App 2D Dwg 23D; App 3B Dwg 24B
CD-31606-0110D911.75 KBStep-by-Step Systems - No. 1 or 350A - 30, 60, 120 IPM Interrupter and Interrupter Alarm CircuitIss 10D Dwg 24D; App 1D Dwg 25D; App 2D Dwg 26D
CD-31637-019AR1.44 MBStep-by-Step Systems - No. 1 - Test Set Circuit for Testing Local, Toll, and Combination Local and Toll ConnectorsIss 9AR Dwg 15AR; App 1D Dwg 16D
CD-31637-023D1.52 MBStep by Step Systems - No. 1 - Test Set Circuit for Testing Local, Toll and Combination Local and Toll ConnectorsIss 3D Dwg 6D; App 1D Dwg 7D; App 2D Dwg 8D
CD-31642-013D671.58 KBStep by Step System - No. 1, 350A, or 355A - Test Line Circuit for Testing Trunks Incoming from Local Office Coin Box Trunks, or Trunk Circuits with Delayed Charge Interval for Operating Subscriber RegisterIss 3D Dwg 8D
CD-31674-013D487.49 KBStep by Step Systems - No. 1, 350A, 355A, 360A, 370A or 370B - 2-Way Repeater Circuit - Outgoing-Battery and Ground Pulsing with Loop Supervision - Incoming - Arranged for Pulse TransmissionIss 3D Dwg 9D; App 1B Dwg 10B; App 2D Dwg 11D; App 3D Dwg 12D; App 4D Dwg 13D
CD-31726-015B963.36 KBStep-by-Step Systems - No. 1, 350A, 355A or 35E97 - Incoming Trunk Circuit - E, M and N or E and M Leads SupervisionIss 5B Dwg 12B; App 1D Dwg 13D; App 2D Dwg 14D
CD-31737-015D589.48 KBStep-by-Step Systems - No. 1, 350A or 355A - Local Connector Circuit - One RingIss 5D Dwg 17D; App 1B Dwg 18B; App 2D Dwg 19D; App 3D Dwg 20D
CD-31738-017D640.58 KBStep-by-Step Systems - No. 1, 350A or 355A - Connector Circuit - Local Rotary Hunting - Selective or One Ring Semi-Selective Ringing with or without Arrangement to Cancel Reverse Battery Supervision on Specified LevelsIss 7D Dwg 23D; App 1D Dwg 24D
CD-31739-013D702.25 KBStep-by-Step Systems - No. 1, 350A or 355A - Combination Connector Circuit - One Ring with or without Reverse Battery SupervisionIss 3D Dwg 14D; App 1B Dwg 15B; App 2D Dwg 16D; App 3B Dwg 17B; App 4AR Dwg 18AR; App 5D Dwg 19D
CD-31767-013B383.65 KBStep by Step Systems - No. 1, 350A or 355A - Intercepting Trunk Circuit from Local Selector MultipleIss 3B Dwg 8B; App 1D Dwg 9D; App 2B Dwg 10B; App 3D Dwg 11D
CD-31771-016D610.11 KBStep-by-Step Systems - No. 1, 350A, 355A, 360A or 35-E-97 - Intercepting Trunk Circuit from Trunk Finder, Connector Bank or Intercepting Trunk, to Trunk to Operator Office - Arranged to Trip Ringing Only During Ringing IntervalIss 6D Dwg 14D
CD-31773-012D447.26 KBStep by Step Systems - No. 1, 350A, 355A or 356A - Test Connector Circuit for Use with Multi Party - One or Two Terminal Per Line ServiceIss 2D Dwg 4D; App 1D Dwg 5D; App 2D Dwg 6D; App 3D Dwg 7D; App 4D Dwg 8D; App 5D Dwg 9D; App 6D Dwg 10D; App 7D Dwg 11D
CD-31775-0111B578.01 KBStep-by-Step Systems - No. 1, 350A or 355A - 2 Way Trunk Circuit to Manual or Toll Office - Composite Signaling Type B - Incoming to Local SwitchtrainIss 11B Dwg 25B; App 1B Dwg 26B; App 2B Dwg 27B; App 3B Dwg 28B; App 4AC Dwg 29AC; App 5B Dwg 30B
CD-31775-018B961.24 KBStep by Step Systems - No. 1, 350A or 355A - 2 Way Trunk Circuit to Manual or Toll Office - Type B T.B. Supply - Composite Signaling Type BIss 8B Dwg 17B; App 1D Dwg 18D; App 2B Dwg 19B; App 3B Dwg 20B
CD-31777-015D131.68 KBStep by Step Systems - No. 355A, 356A or 35-E-97 - Subscriber Line CircuitIss 5D Dwg 28D; App 1B Dwg 29B
CD-31777-016D444.50 KBStep-by-Step Systems - No. 355A, 356A or 35-E-97 - Subscriber Line CircuitIss 6D Dwg 35D; App 1AC Dwg 36AC; App 2A Dwg 37A
CD-31793-017D549.33 KBStep by Step Systems - No. 1, 350A, 355A, 360A or 35-E-97 - Line or Trunk Finder Circuit - 22 PointIss 7D Dwg 12D; App 1B Dwg 13B; App 2D Dwg 14D; App 3D Dwg 15D; App 4D Dwg 16D
CD-31795-013B899.01 KBStep-by-Step Systems - No. 1, 350A, 355A, or 360A - Outgoing Trunk Circuit from Selector Multiple - Multiple at Switchboard - Composite Supervision Type BIss 3B Dwg 7B; App 1D Dwg 8D; App 2D Dwg 9D; App 3D Dwg 10D; App 4D Dwg 11D; App 5D Dwg 12D; App 6B Dwg 13B; App 7B Dwg 14B; App 8D Dwg 15D
CD-31805-014D666.46 KBStep-by-Step Systems - No. 1, 350A or 355A - Local Connector Circuit - 8-Party Terminal Per Station - Semi-Selective RingingIss 4D Dwg 13D; App 1B Dwg 14B; App 2D Dwg 15D
CD-31825-012D450.42 KBStep by Step Systems - No. 1, 350A, 355A or 356A - Tone Interrupter Circuit for Class of Service ToneIss 2D Dwg 3D; App 1D Dwg 4D; App 2D Dwg 5D; App 3D Dwg 6D; App 4D Dwg 7D
CD-31854-011538.65 KBStep-by-Step System - No. 355A - Auxiliary Line Circuit for Operating Subscriber's RegisterIss 1 Dwg 1; App 1D Dwg 1D; App 2D Dwg 3D; App 3D Dwg 4D; App 4D Dwg 5D; App 5D Dwg 6D; App 6D Dwg 7D; App 7D Dwg 8D
CD-31857-017D424.80 KBStep by Step Systems - No. 355A or 35-E-97 - Test Jack and Connector Test Line CircuitIss 7D Dwg 12D; App 1D Dwg 13D; App 2D Dwg 14D
CD-31859-0111D1.52 MBStep by Step Systems - No. 355A, 356A or 35-E-97 - Test Set for Connectors and Selectors Other Than Toll Transmission Selectors and Trunks Except Those with Coin FeaturesIss 11D Dwg 15D
CD-31861-015D375.17 KBStep-by-Step Systems - No. 1, 350A, 355A, 360A or 35-E-97 - Coin Trunk Timed Release Circuit for Use with Coin Trunks Arranged for Prepay ServiceIss 5D Dwg 7D; App 1B Dwg 8B; App 2D Dwg 9D
CD-31867-014D366.57 KBStep-by-Step Systems - No. 1, 350A or 355A - 2-Way Interlocal Trunk Circuit - Composite Signaling Type "B" or Simplex Signaling with Pulse Correction on Incoming CallsIss 4D Dwg 12D
CD-31868-017B504.38 KBStep-by-Step Systems - No. 355A - Toll Systems - Intertoll Dialing Office - Interrupter Relay CircuitIss 7B Dwg 18B; App 1D Dwg 19D; App 2B Dwg 20B; App 3B Dwg 21B
CD-31872-011192.93 KBStep by Step System - 355A Dial Office - Trunk Circuit - Vacant Level or Overflow for Local SelectorsIss 1 Dwg 1
CD-31912-017D744.73 KBStep by Step Systems - No. 1, 350A, 355A, 356A or 360A - Cable Protective Device Alarm - Cable Insulation Alarm and Permanent Signal Alarm Circuit Arranged to Operate on a Specified Number of Permanent Signals - PSB and PSL Battery SupplyIss 7D Dwg 20D; App 1D Dwg 21D; App 2B Dwg 22B
CD-31922-015D689.50 KBStep-by-Step Systems - No. 355A or No. 356A - Line Finder Control Ckt. With or Without Mate OperationIss 5D Dwg 19D
CD-31932-0111.92 MBSXS Systems - No. 350A or 355A - Test Line Circuit for Testing Local or Toll Train for Ringing and ContinuityIss 1 Dwg 1; App 1D Dwg 2D; App 2D Dwg 3D; App 3B Dwg 4B; App 4D Dwg 5D; App 5D Dwg 6D
CD-31941-012D228.79 KBStep by Step Systems - No. 1 or 350A with AT - No. 1 with AMA - Miscellaneous Circuit Identifier FrameIss 2D Dwg 5D
CD-31974-015D523.28 KBStep-by-Step Systems - No. 355A or 35E97 - Miscellaneous Alarm Circuit - Key, Ringing Fuse and Fuse Alarm Circuits for Alarms and Relay Rack BaysIss 5D Dwg 20D; App 1D Dwg 21D
CD-31975-015D221.22 KBStep by Step Systems - No. 355A, 360A or 35-E-97 - Miscellaneous Alarm Circuit - Prepay Coin Trunk Alarm and Coin Battery Fuse AlarmIss 5D Dwg 11D
CD-31978-014D286.46 KBStep by Step Systems - No. 355A, 356A, 360A or 35-E-97 - Miscellaneous Alarm Circuit for Message Rate Trunks - Auxiliary Line Circuits - Line and Trunk Finders and Prepayment Coin Box TrunksIss 4D Dwg 11D; App 1D Dwg 12D; App 2D Dwg 13D; App 3B Dwg 14B; App 4D Dwg 15D
CD-31980-0111D1.10 MBStep by Step Systems - No. 355A - Miscellaneous Alarm Circuit - Alarm Control and Sender CircuitsIss 11D Dwg 17D; App 1A Dwg 18A
CD-32000-012D1.21 MBStep-by-Step Systems - No. 355A - 200 Point Line Finder Circuit - 3 WireIss 2D Dwg 4D; App 1D Dwg 5D; App 2D Dwg 6D; App 3D Dwg 7D; App 4B Dwg 8B; App 5D Dwg 9D; App 6D Dwg 10D
CD-32007-019AC837.68 KBStep-by-Step Systems - No. 1, 350A or 355A - Test Distributor Circuit for Testing Subscriber Lines or for Verification Service Arranged for One-Digit Operation on Specified Levels or for 2 Digit Operation on All LevelsIss 9AC Dwg 22AC; App 1AC Dwg 23AC; App 2D Dwg 24D; App 3B Dwg 25B; App 4B Dwg 26B; App 5B Dwg 27B; App 6D Dwg 28D; App 7B Dwg 29B
CD-32042-016D641.38 KBStep by Step Systems - No. 350A or 355A - Recording Completing Trunk with or without Coin with Ringback - Composite Signaling Type B or Simplex SignalingIss 6D Dwg 9D; App 1D Dwg 10D
CD-32043-0110D381.03 KBStep-by-Step Systems - No. 1 or 350A - Switch Trouble Alarm Circuit - Selector Shelf Circuits - No. 355A - Miscellaneous Alarm Circuit - Selector Shelf CircuitsIss 10D Dwg 27D; App 1D Dwg 28D; App 2D Dwg 29D
CD-32045-018D645.69 KBStep-by-Step Systems - No. 1 or 350A - Switch Trouble Alarm Circuit - Connector Shelf and PBX Trunk Shelf Circuits - No. 355A - Miscellaneous Alarm Circuit - Connector Shelf CircuitsIss 8D Dwg 22D; App 1D Dwg 23D; App 2AC Dwg 24AC; App 3AC Dwg 25AC; App 4B Dwg 26B; App 5B Dwg 27B; App 6D Dwg 28D; App 7D Dwg 29D; App 8D Dwg 30D
CD-32045-019D255.89 KBStep-by-Step Systems - No. 1 or 350A - Switch Trouble Alarm Circuit - Connector Shelf and PBX Trunk Shelf Circuits - No. 355A - Miscellaneous Alarm Circuit - Connector Shelf CircuitsIss 9D Dwg 31D
CD-32048-013D311.81 KBStep by Step Systems - No. 1 or 350A - Switch Trouble Alarm Circuit for Trunk and Miscellaneous Shelves - No. 355A - Miscellaneous Alarm Circuit for Trunk and Miscellaneous ShelvesIss 3D Dwg 11D; App 1D Dwg 12D
CD-32063-012D218.07 KBStep by Step Systems - No. 350A, 355A or 356A - Trunk or Connector Alternating Relay CircuitIss 2D Dwg 2D; App 1D Dwg 3D
CD-32069-017D1.96 MBStep-by-Step Systems - No. 1, 350A, 355A, 360A or A.E. Co. 35E97 - Line Load Control CircuitIss 7D Dwg 16D; App 1D Dwg 17D; App 2D Dwg 18D; App 3D Dwg 19D; App 4D Dwg 20D; App 5D Dwg 21D
CD-32077-016D671.58 KBStep-by-Step Systems - No. 1, 350A, 355A or 360A - 3 or 4 Wire Selector for Use as Local or Incoming Selector Repeated Dialing Toll Preciding Selector or 2 Party Message Rate Selector - Absorbs Digits Once or Repeatedly - Restricts Service Over Specified Levels - Provides Timed Release on Permanent Signal or Busy Flash on Calls from OperatorIss 6D Dwg 7D; App 1D Dwg 8D
CD-32082-014D753.80 KBStep-by-Step Systems - No. 1, 350A or 355A - Trunk Circuit - No. 1, 350A, 355A or 356A - Auxiliary Line Circuit for Operating Subscibers Register with Delayed Charge Interval Using Regular Central Office BatteryIss 4D Dwg 12D; App 1D Dwg 13D; App 2D Dwg 14D; App 3D Dwg 15D
CD-32084-012D328.10 KBStep by Step Systems - No. 1, 350A or 355A - Auxiliary Trunk Circuit - Digit Absorbing - For Use Between Toll Selector Multiple and Intercepting Trunk Circuit or Btween Local Selector Multiple and Operator Office Trunk Circuit for Delaying Cut ThruIss 2D Dwg 6D; App 1D Dwg 7D
CD-32087-011284.97 KBStep by Step Systems - No. 1, 350A or 355A - Outgoing Repeater Circuit - Battery and Ground Pulsing - Long Range Reverse Battery Supervision - Type "B" TB SupplyIss 1 Dwg 1; App 1D Dwg 2D; App 2D Dwg 3D; App 3D Dwg 4D
CD-32093-0111.07 MBStep-by-Step Systems - No. 1, 350A, 355A, 360A, CX-30, CX-60, CX-100, CX-200, 32A32, 32A44, 35E97, 375A, 375B, 385A, 385B, 386A or 386B - Type "B" Emergency Manual Circuit for Manual Operation and Interception of Subscriber Lines and Trunk CircuitsIss 1 Dwg 1; App 1A Dwg 2A
CD-32123-013D126.00 KBStep-by-Step Systems - No. 1, 350A, 355A, 356A, or 35-E-97 - Selector Bank Multiple CircuitIss 3D Dwg 19D; App 1D Dwg 20D
CD-32128-012D557.87 KBStep-by-Step Systems - No. 1, 350A, 355A, 356A, or 35E97 - Connector Bank Multiple CircuitIss 2D Dwg 7D; App 10D Dwg 17D; App 11D Dwg 18D; App 12D Dwg 19D; App 13D Dwg 20D; App 1D Dwg 8D; App 2D Dwg 9D; App 3D Dwg 10D; App 4D Dwg 11D; App 5D Dwg 12D; App 6D Dwg 13D; App 7D Dwg 14D; App 8D Dwg 15D; App 9D Dwg 16D
CD-32129-011297.31 KBStep-by-Step Systems - No. 1, 350A, 355A, or 35E97 - Miscellaneous Bank Multiple CircuitIss 1 Dwg 1; App 1D Dwg 2D; App 2D Dwg 3D; App 3D Dwg 4D; App 4D Dwg 5D; App 5D Dwg 6D
CD-32133-016D468.01 KBStep-by-Step Systems - No. 1, 350A, 355A, 360A or 35-E-97 - Subscriber Line CircuitIss 6D Dwg 18D; App 1D Dwg 19D; App 2B Dwg 20B; App 3A Dwg 21A; App 4B Dwg 22B; App 5D Dwg 23D; App 6B Dwg 24B; App 7B Dwg 25B
CD-32146-012D558.31 KBStep by Step Systems - No. 355A Dial Office - Coin Trunk or No. 355A & No. 356A - Auxiliary Coin Line Circuit for Dial Post Payment ServiceIss 2D Dwg 3D; App 1D Dwg 4D; App 2D Dwg 5D; App 3D Dwg 6D; App 4D Dwg 7D; App 5D Dwg 8D
CD-32153-013D158.11 KBStep-by-Step Systems - No. 1, 350A, 355A or 356A - Miscellaneous Circuit for Angle Relay Rack BaysIss 3D Dwg 4D
CD-32153-014D400.63 KBStep-by-Step Systems - No. 1, 350A, 355A or 356A - Miscellaneous Circuit for Angle Relay Rack Bays and Universal Switch FramesIss 4D Dwg 6D; App 1D Dwg 7D; App 2D Dwg 8D; App 3D Dwg 9D; App 4D Dwg 10D; App 5D Dwg 11D; App 6B Dwg 12B
CD-32170-014B191.72 KBStep-by-Step Systems - No. 1, 350A, 355A or 360A - Outgoing Information Trunk Circuit from Local or Toll Preceding Selector Multiple with or without High Low SupervisionIss 4B Dwg 4B
CD-32178-012D556.63 KBStep by Step Systems - No. 1 or 350A - 2-Wire Trunk Circuits from Selector and Connector Multiple to Repair Service Desk No. 2Iss 2D Dwg 2D; App 1D Dwg 3D
CD-32187-013D362.32 KBStep by Step Systems - No. 1, 350A, 355A, 356A or 360A - Auxiliary Trunk Circuit Arranged to Restrict ServiceIss 3D Dwg 4D; App 1B Dwg 5B
CD-32192-014D1.30 MBStep by Step Systems - No. 355A - Miscellaneous Alarm Circuit - Alarm Control and Aisle Pilots - Permanent Signal Timing CircuitIss 4D Dwg 9D; App 1D Dwg 10D; App 2D Dwg 11D; App 3D Dwg 12D
CD-32192-017D1.27 MBStep-by-Step Systems - No. 355A - Miscellaneous Alarm Circuit - Alarm Control and Aisle Pilots - Permanent Signal Timing CircuitIss 7D Dwg 24D; App 1D Dwg 25D
CD-32192-018B1.29 MBStep-by-Step Systems - No. 355A - Miscellaneous Alarm Circuit - Permanent Signal Timing CircuitIss 8B Dwg 26B
CD-32193-011383.03 KBStep by Step Systems - No. 1, 350A or 355A - Miscellaneous Alarm Circuit - Alarm SenderIss 1 Dwg 1; App 1D Dwg 2D; App 2D Dwg 3D; App 3B Dwg 4B; App 4B Dwg 5B
CD-32194-013B523.69 KBStep by Step Systems - No. 1, 350A, 355A, 35-E-97 or No. 1 with AMA - Group and Alarm Relay Ckt for Line and Trunk FindersIss 3B Dwg 11B
CD-32202-017D1.77 MBStep-by-Step Systems - No. 1, 350A, 355A, 356A, 360A, 35-E-97 and North Electric Co. CX Offices - Intercepting Trunk Circuit for Intercepting Calls From Connector Terminals and From Selector Levels for Use with an Announcement Machine - Announcement System No. 7AIss 7D Dwg 16D; App 1D Dwg 17D; App 2D Dwg 18D; App 3D Dwg 19D
CD-32216-013D420.10 KBStep-by-Step Systems - No. 355A or 35E97 - Subscriber Line Circuit Arranged for LockoutIss 3D Dwg 6D; App 1D Dwg 7D; App 2D Dwg 8D
CD-32239-013D363.41 KBStep-by-Step Systems - No. 1, 350A, 355A or 35E97 - Switch Trouble Alarm Circuit for Line Finders, Trunk Finders or Permanent Signal FindersIss 3D Dwg 9D; App 1D Dwg 10D; App 2B Dwg 11B; App 3B Dwg 12B; App 4BU Dwg 13BU
CD-32241-015B372.32 KBStep by Step Systems - No. 1, 350A, 355A, or 35E97 - Outgoing Trunk Circuit - E and M Lead Signaling to CAMA OfficeIss 5B Dwg 12B
CD-32248-016D451.33 KBStep-by-Step Systems - No. 1, 350A, 355A or 35-E-97 - Miscellaneous Circuir for ANI - Type B and Type C Trunk FramesIss 6D Dwg 12D; App 1D Dwg 13D; App 2B Dwg 14B
CD-32289-013D1.06 MBStep-by-Step Systems - No. 1, 350A, 355A, 360A or 35E97 - Coin Control Trunk Circuit Using 2 Frequencies Over Tip and Ring for Calls froM Switchboard Using Local or Toll TrainIss 3D Dwg 4D; App 1D Dwg 5D
CD-32309-012AC2.72 MBStep-by-Step Systems - No. 1, 350A, 355A, or 35-E-97 - Outgoing Intercepting Trunk Circuit - E and M Lead SupervisionIss 2AC Dwg 3AC; App 1AR Dwg 4AR; App 2B Dwg 5B; App 3A Dwg 6A; App 4B Dwg 7B; App 5A Dwg 8A
CD-32310-0111.46 MBStep-by-Step Systems - No. 1, 350A, 355A or 35-E-97 - Pulse Generator and Counting Circuit for Use with Intercepting Trunk Circuits Using E and M Lead SupervisionIss 1 Dwg 1; App 1A Dwg 2A; App 2D Dwg 3D; App 3D Dwg 4D
CD-32311-013B318.37 KBStep by Step Systems - No. 1, 350A, 355A or 35E97 - Outgoing Trunk Circuit from Selector Multiple for Information, Repair, Official PBX or Intercepting Service - E and M Lead SupervisionIss 3B Dwg 8B
CD-32342-014D5.55 MBStep-by-Step Systems - No. 1, 350A, 355A or 35E97 - Outgoing Trunk Circuit - Loop or E&M Lead Signaling - Special Toll or Operator Assistance - ANI Type B or C for No. 1, 350A, 355A or ANI Type C for 35E97 or Operator Identified to CAMA OfficeIss 4D Dwg 7D; App 1B Dwg 8B; App 2B Dwg 9B; App 3D Dwg 10D; App 4B Dwg 11B; App 5D Dwg 12D
CD-32344-017D7.94 MBStep-by-Step Systems - No. 1, 350A, 355A or 35-E-97 - Outgoing Coin Trunk Circuit - Loop or E&M Lead Signaling - Arranged to Handle Special Toll or Operator Assistance and Station to Station Sent Paid Calls - ANI-B or C for No. 1, 350A or 355A or ANI-C for 35E97 or Operator Identified to CAMAIss 7D Dwg 15D; App 1B Dwg 16B
CD-32531-013AC315.26 KBStep-by-Step Systems - No. 1, 350A, 355A - Auxiliary Trunk Circuit Arranged for Intercept Service Between Connector Numbers in SXS ANI-B Type Offices and an Automatic Intercept SystemIss 3AC Dwg 4AC; App 1A Dwg 5A; App 2AR Dwg 6AR; App 3B Dwg 7B; App 4B Dwg 8B
CD-32539-0116.48 MBStep-by-Step Systems - No. 1, 350A, 355A, 360A or 35-E-97 - Coin Trunk Circuit for Use Preceding a First Selector Serving Coin Lines Arranged for Prepay or Coinless Access to Specified NumbersIss 1 Dwg 1; App 1A Dwg 2A; App 2A Dwg 3A; App 3B Dwg 4B
CD-33003-012D2.01 MBStep-by-Step Systems - No. 1, 350A, 355A or 360A - Local, Incoming or 2 Party Message Rate - 3 or 4 Wire Selector Arranged to Restrict Service Over Any Specified Levels, for Peg Count on Cut Thru, and for Timed Release on Permanent Signal or Busy Flash on Calls from OperatorIss 2D Dwg 3D; App 1D Dwg 4D; App 2D Dwg 5D; App 3D Dwg 6D; App 4D Dwg 7D; App 5D Dwg 8D
CD-33013-014D2.61 MBStep-by-Step Systems - No. 1, 350A, 355A, 360A or 35-E-97 - 200 Point Line or Trunk Finder - 3 WireIss 4D Dwg 5D; App 1D Dwg 6D; App 2D Dwg 7D; App 3D Dwg 8D; App 4D Dwg 9D; App 5D Dwg 10D
CD-33015-013D2.01 MBStep-by-Step Systems - No. 1, 350A, 355A, or 35-E-97 - Line Finder Circuit - 200 Point - 4 WireIss 3D Dwg 4D; App 1D Dwg 5D; App 2D Dwg 6D; App 3D Dwg 7D; App 4D Dwg 8D; App 5AC Dwg 9AC
CD-33022-014D2.28 MBStep by Step Systems - No. 1, 350A, 355A, 360A or 35-E-97 - Coin Connector Circuit - One RingIss 4D Dwg 12D; App 1D Dwg 13D
CD-33027-0111.75 MBStep by Step Systems - No. 1, 350A, 355A or 360A - Code Selector Circuit Arranged to Absorb Digits Repeatedly and to Restrict Service Until a Digit is AbsorbedIss 1 Dwg 1
CD-35033-011619.57 KBStep-by-Step Systems - No. 1, 350A, 355A or 35E97 with "TOUCH-TONE" Type D - Converter Trunk and LinkIss 1 Dwg 1; App 1B Dwg 2B; App 2A Dwg 3A; App 3AR Dwg 4AR
CD-3C252-013A3.32 MBCommon Systems - T1C Office Repeater Bay - Application SchematicIss 3A Dwg 3A; App 1B Dwg 4B; App 2A Dwg 5A; App 3B Dwg 6B; App 4B Dwg 7B; App 5D Dwg 8D
CD-3C254-013B870.44 KBCommon Systems - T1C Digital Line - Order Wire CircuitIss 3B Dwg 4B
CD-3C285-0112.42 MBCommon Systems - T1 Digital Line - 221-Type Office RepeaterIss 1 Dwg 1; App 1A Dwg 2A
CD-3C290-0111022.81 KBCommon Systems - 4B Channel PCM Bank Type D4 - Maintenance Bank - Application SchematicIss 1 Dwg 1; App 1A Dwg 2A; App 2AC Dwg 3AC; App 3B Dwg 4B
CD-3C292-012A486.94 KBCommon Systems - 660 Communication Panel CircuitsIss 2A Dwg 2A; App 1B Dwg 3B
CD-3C292-014D683.69 KBCommon Systems - 660 Communication Panel CircuitIss 4D Dwg 7D; App 1D Dwg 8D; App 2A Dwg 9A; App 3B Dwg 10B; App 4D Dwg 11D; App 5B Dwg 12B; App 6B Dwg 13B
CD-3C304-0211.94 MBCommon Systems - 48 Channel PCM Bank Type D4 - Application SchematicIss 1 Dwg 1; App 1B Dwg 2B
CD-3C311-012B490.40 KBCommon Systems - 48 Channel PCM Bank Type D4 - Trunk Processing Unit (TPU)Iss 2B Dwg 2B
CD-3C348-0111009.40 KBToll Systems - T1C/T1 Quasi Random Signal Source (QRSS)Iss 1 Dwg 1; App 1A Dwg 2A
CD-3D031-013A2.48 MBData Systems - Station - Data Auxiliary Sets 820D and 820E TypesIss 3A Dwg 6A; App 1D Dwg 7D; App 2B Dwg 8B
CD-3F027-012B298.59 KBSignaling and Packet Switching Systems - Common Network Interface - Digital Facility Access Cabinet CircuitIss 2B Dwg 3B; App 1A Dwg 4A; App 2B Dwg 5B; App 3A Dwg 6A; App 4B Dwg 7B
CD-3H110-012A1.64 MBElectronic Switching Systems - No. 3 - Peripheral Control CircuitIss 2A Dwg 2A
CD-3H120-012A1.13 MBElectronic Switching Systems - No. 3 - 15A Remreed Grid CircuitIss 2A Dwg 2A; App 1A Dwg 3A; App 2A Dwg 4A; App 3D1 Dwg 5D1
CD-3H121-012A749.24 KBElectronic Switching Systems - No. 3 - 15B Remreed Grid CircuitIss 2A Dwg 2A; App 1D Dwg 3D
CD-3H122-012A355.84 KBElectronic Switching Systems - No. 3 - First and Second Stage Access CircuitIss 2A Dwg 2A
CD-3H130-011473.68 KBElectronic Switching Systems - No. 3 - 15C Remreed Grid CircuitIss 1 Dwg 1; App 1D Dwg 2D
CD-3H131-012A408.47 KBElectronic Switching Systems - No. 3 - Third Stage Access CircuitIss 2A Dwg 2A
CD-3H140-012A550.49 KBElectronic Switching Systems - No. 3 - Master Scanner Matrix CircuitIss 2A Dwg 2A
CD-3H150-011347.23 KBElectronic Switching Systems - No. 3 - Distribute Point CircuitIss 1 Dwg 1; App 1D Dwg 2D
CD-3H200-012A1.75 MBElectronic Switching Systems - No. 3 - Junctor and Junctor Control CircuitIss 2A Dwg 2A
CD-3H205-011452.99 KBElectronic Switching Systems - No. 3 - Dial-Tone-First Coin Line CircuitIss 1 Dwg 1
CD-3H208-011511.39 KBElectronic Switching Systems - No. 3 - Noise Immunity Line CircuitIss 1 Dwg 1; App 1A Dwg 2A
CD-3H220-012A1.43 MBElectronic Switching Systems - No. 3 - Universal Trunk CircuitIss 2A Dwg 2A; App 1A Dwg 3A; App 2D Dwg 4D
CD-3H401-012A1.02 MBElectronic Switching Systems - No. 3 - "TOUCH-TONE" Calling Detector CircuitIss 2A Dwg 2A; App 1A Dwg 3A
CD-3H402-012A1.15 MBElectronic Switching Systems - No. 3 - Multifrequency Receiver CircuitIss 2A Dwg 2A
CD-3H403-011522.65 KBElectronic Switching Systems - No. 3 - Dial Pulse Transmitter CircuitIss 1 Dwg 1
CD-3H404-0111.19 MBElectronic Switching Systems - No. 3 - Multifrequency Transmitter CircuitIss 1 Dwg 1
CD-3H406-0111.27 MBElectronic Switching Systems - No. 3 - Superimposed Ringing CircuitIss 1 Dwg 1; App 1A Dwg 2A
CD-3H410-012A1.74 MBElectronic Switching Systems - No. 3 - Customer Dial Pulse Receiver and Regular Ringing CircuitIss 2A Dwg 2A; App 1A Dwg 3A
CD-3H411-013A1.07 MBElectronic Switching Systems - No. 3 - Coin, Tone, Announcement and Conference CircuitIss 3A Dwg 3A; App 1B Dwg 4B
CD-3H520-012A6.76 MBElectronic Switching Systems - No. 3 - Peripheral Test CircuitIss 2A Dwg 2A; App 1A Dwg 3A; App 2B Dwg 4B
CD-3H901-012A585.22 KBElectronic Switching Systems - No. 3 - Network Frame CircuitIss 2A Dwg 2A; App 1A Dwg 3A; App 2A Dwg 4A
CD-3H902-012A1.51 MBElectronic Switching Systems - No. 3 - Control Frame CircuitIss 2A Dwg 2A; App 1AC Dwg 3AC; App 2A Dwg 4A; App 3A Dwg 5A; App 4B Dwg 6B
CD-3H904-012A867.71 KBElectronic Switching Systems - No. 3 - Test Frame CircuitIss 2A Dwg 2A
CD-3H905-012A873.28 KBElectronic Switching Systems - No. 3 - Miscellaneous Power CircuitIss 2A Dwg 2A; App 1A Dwg 3A; App 2D Dwg 4D
CD-3H907-011409.47 KBElectronic Switching Systems - No. 3 - DC Power Distribution CircuitIss 1 Dwg 1; App 1A Dwg 2A; App 2D Dwg 3D
CD-3H908-011268.94 KBElectronic Switching Systems - No. 3 - AC Power Distribution CircuitIss 1 Dwg 1; App 1D Dwg 2D
CD-3H911-012B202.32 KBElectronic Switching Systems - No. 3 - Distribute Point Applique CircuitIss 2B Dwg 2B; App 1BU Dwg 3BU
CD-3H912-013D226.74 KBElectronic Switching Systems - No. 3 - Scanner, Peripheral Pulse Distributor and Peripheral Decoder - Assignment Rules and Compatibility GuideIss 3D Dwg 3D
CD-3H914-011214.37 KBElectronic Switching Systems - No. 3 - Data Interface CircuitIss 1 Dwg 1
CD-3T003-011152.56 KBCommon Systems - 3B20D Model 3 Processor - SCSI Growth or Conversion Unit CircuitIss 1 Dwg 1; App 1A Dwg 2A; App 2A Dwg 3A
CD-3T004-011254.34 KBCommon Systems - 3B20D Model 2 & 3 Processor - Small Computer Systems Interface (SCSI) - New Ship Unit CircuitIss 1 Dwg 1
CD-3T011-013B681.25 KBCommon Systems - 3B21D Computer - Processor Circuit UnitIss 3B Dwg 3B
CD-3T012-012B338.72 KBCommon Systems - 3B21D Computer - Growth Unit CircuitIss 2B Dwg 2B
CD-3T015-011340.72 KBCommon Systems - 3B21D Computer - Computer Systems CircuitIss 1 Dwg 1; App 1B Dwg 2B
CD-4C003-013AC339.79 KBCommon Systems - Lighting Circuit - Fluorescent Type and Appliance Outlets for Electronic Switching Systems AreasIss 3AC Dwg 3AC
CD-4C005-021313.05 KBCommon Systems - Programmable Read Only Memory CircuitIss 1 Dwg 1
CD-4C035-011317.61 KBCommon Systems - Toll Power Distributing Unit Circuit for Use with No. 2 ESS, 2A ESS, 3 ESSIss 1 Dwg 1
CD-4C053-012343.50 KBCommon Systems - AT&T 3B20D Models 1, 2 and 3 Computer - AC & DC Power Distribution CircuitIss 2 Dwg 5A
CD-4C065-011133.32 KBCommon Systems - 3B20D Models 1, 2 and 3 Processor - Port Switch Unit CircuitIss 1 Dwg 1; App 1B Dwg 2B; App 2D Dwg 3D; App 3M Dwg 4M
CD-4C097-012B217.24 KBCommon Systems - 3B20D Model 2 and 3 Processor - Main Store and IOP Growth Unit CircuitIss 2B Dwg 9B
CD-4C098-012B221.57 KBCommon Systems - 3B20D Model 2 and 3 Processor - Central Processing Unit CircuitIss 2B Dwg 10B; App 1B Dwg 11B; App 2B Dwg 12B; App 3B Dwg 13B; App 6B Dwg 16B
CD-4C099-012B340.04 KBCommon Systems - 3B20D Model 2 & 3 Processor - Main Store, IO and DFC Unit CircuitIss 2B Dwg 10B; App 1B Dwg 11B; App 3B Dwg 13B; App 4M Dwg 14M
CD-4C101-012145.94 KBCommon Systems - 3B20D Model 2 & 3 Processor - I/O Processor Basic Unit CircuitIss 2 Dwg 11M
CD-4C102-01153.06 KBCommon Systems - 3B20D Model 2 & 3 Processor - Power Distribution Unit CircuitIss 1 Dwg 1; App 1B Dwg 2B
CD-4C115-011156.44 KBCommon Systems - 3B20S Model 2 Processor - IO Processor and DFC Controller Unit CircuitIss 1 Dwg 1; App 1A Dwg 2A; App 2B Dwg 3B; App 3B Dwg 4B; App 4B Dwg 5B; App 5B Dwg 6B; App 6AC Dwg 7AC
CD-4C119-011228.64 KBCommon Systems - 3B20D Model 2 & 3 Processor - Processor Control Cabinet Circuit for 5ESSIss 1 Dwg 1; App 1B Dwg 2B; App 2AC Dwg 3AC; App 3B Dwg 4B; App 4A Dwg 5A; App 5B Dwg 6B; App 6AC Dwg 7AC; App 7M Dwg 8M; App 8B Dwg 9B
CD-4C120-011124.70 KBCommon Systems - 3B20D Model 2 Processor - Tape Unit Cabinet CircuitIss 1 Dwg 1; App 1B Dwg 2B
CD-4C122-011221.28 KBCommon Systems - 3B20D Model 2 & 3 Processor - Processor System Cabinet for 5ESSIss 1 Dwg 1; App 1B Dwg 2B; App 2B Dwg 3B; App 3B Dwg 4B; App 4A Dwg 5.pdf; App 5A Dwg 6A; App 6AC Dwg 7AC; App 7B Dwg 8B
CD-4C122-012B149.05 KBCommon Systems - 3B20D Model 2 and 3 Processor - Processor System Cabinet for 5ESSIss 2B Dwg 9B; App 1B Dwg 10B
CD-4C126-011133.20 KBCommon Systems - 3B20D Model 3 Processor - Tape / Disk CabinetIss 1 Dwg 1; App 1B Dwg 2B; App 2B Dwg 3B
CD-4C127-012B247.97 KBCommon System - 3B20D Model 3 Computer - Computer System CircuitIss 2B Dwg 10B; App 1B Dwg 11B; App 2B Dwg 12B; App 3B Dwg 13B; App 4B Dwg 14B; App 5B Dwg 15B
BT-51005-011929-03-19310.71 MBSubscriber's Sender Circuit - 2 Digit Office Code - Panel Machine Switching SystemIss 3 Dwg 24
BT-51009-011931-06-244124.60 KBPanel System - Sender Circuit - Subscriber's 2 Digit Non-CoinApp 1 Dwg 29
CD-51546-0111B4.73 MBToll Systems - TD Radio - Application Schematic for TD-3D Transmitter-Receiver BayIss 11B Dwg 36B; App 1B Dwg 37B; App 2B Dwg 38B
BT-52005-021933-03-2315.78 MBLine Circuit - District Selector Circuit - Line Finder Circuit - Arranged for Individual Message Register or Flat Rate Service - 400 Point Lockout Type Line Finder - Panel SystemIss 1 Dwg 1; App 1 Dwg 7; App 2 Dwg 18; App 3 Dwg 24; App 4 Dwg 35; App 5 Dwg 41
BT-52005-031933-03-3036.31 MBLine Circuit - District Selector Circuit - Line Finder Circuit - Arranged for Two Party Message Rate Lines - 400 Point Lockout Type Line Finder - Panel SystemIss 3 Dwg 22; App 1 Dwg 28; App 2 Dwg 31
BT-53007-011926-11-1621.30 MBSelector Circuit - Incoming From Special "A" Switchboard - Three Wire Dialing - Panel Machine Switching SystemIss 2 Dwg 3
BT-54001-011930-02-1734.48 MBFor Miscellaneous Alarm Circuit - Appearing On Floor Alarm Board - Panel SystemIss 3 Dwg 38; App 1 Dwg 40; App 2 Dwg 43
BT-54002-011930-02-1131.90 MBPower Alarm Circuits - Panel SystemIss 3 Dwg 17; App 1 Dwg 22
CD-55039-018D231.27 KBToll Systems - Toll Switchboard No. 1B, 3B, 3C, 3CF, 3CL, or 5 - Toll Testboard No. 17B, 17C, or 18B - Toll Test Unit No. 1A or 3A - Automatic Outgoing Intertoll Trunk Test Frame - Tandem Patching Bay - Circuit Patching Bay - Auxiliary Signal and Night Alarm CircuitIss 8D Dwg 13D
CD-55392-015B2.13 MBToll Systems - Signaling - 1000 Cycle Signal Receiving CircuitIss 5B Dwg 7B; App 1D Dwg 8D; App 2B Dwg 9B; App 3D Dwg 10D; App 4B Dwg 11B; App 5D Dwg 12D; App 6D Dwg 13D; App 7D Dwg 14D; App 8D Dwg 15D; App 9D Dwg 16D
CD-55574-016D3.15 MBToll Systems - Signaling - Telephone Order Wire Circuit - 1000 Cycle or 1900 Cycle Ringdown SignalingIss 6D Dwg 8D; App 1D Dwg 9D
CD-56073-013D763.42 KBToll Systems - "L" or "N" Carrier Telephone - Telephone Circuit for Use in Offices with 24, 48, 130 or 152 Volt Battery SupplyIss 3D Dwg 5D
CD-56112-018D1.25 MBToll Systems - Signaling - Television Order Wire CircuitIss 8D Dwg 10D; App 1D Dwg 11D; App 2AC Dwg 12AC
CD-56137-016D924.56 KBToll Systems - Signaling - Miscellaneous Jack Circuit - 1600 or 2000 Cycle Signaling for Signaling Test CircuitIss 6D Dwg 9D; App 1D Dwg 10D; App 2D Dwg 11D
CD-56163-012D1.34 MBToll Systems - Signaling - Signaling Converter Circuit for N or O Carrier or Single Frequency Signaling Circuit to 20 Cycle Ringdown CircuitIss 2D Dwg 3D; App 1D Dwg 4D; App 2B Dwg 5B; App 3D Dwg 6D
CD-56454-012A1.01 MBToll Systems - "O" & "ON" Carrier - Remote Alarm Release CircuitIss 2A Dwg 2A
CD-5D001-015M35.90 KB5ESS Switching System - Floor Plan DataIss 5M Dwg 5M
CD-5D001-023M71.87 KB5ESS Switching System - Floorplan Data for the 5ESS-2000 Switch CabinetIss 3M Dwg 3M; App 1M Dwg 4M
CD-5D002-013D224.79 KB5ESS Switching Equipment - Current Drain DataIss 3D Dwg 3D; App 1D Dwg 4D; App 2M Dwg 5M; App 3M Dwg 6M; App 4M Dwg 7M; App 5M Dwg 8M
CD-5D003-01143.31 KB5ESS Switching Equipment - Limiting Conductor SpecificationIss 1 Dwg 1
CD-5D004-014A286.14 KBElectronic Switching Systems - 5ESS - AC Power Distribution CircuitIss 4A Dwg 8B
CD-5D005-016B285.05 KB5ESS Switching Equipment - DC Power Distribution CircuitIss 6B Dwg 16B
CD-5D007-0128M128.68 KB5ESS Switching Equipment Assignment RulesIss 28M Dwg 30M
CD-5D008-013A536.23 KB5ESS Electronic Switching Equipment - Office Alarm Unit CircuitIss 3A Dwg 3A; App 1D Dwg 4D; App 2B Dwg 5B; App 3A Dwg 6A; App 4B Dwg 7B; App 5A Dwg 8A; App 6B Dwg 9B
CD-5D011-012D151.55 KB5ESS Switching Equipment - Data Set Application Schematic CircuitIss 2D Dwg 3D
CD-5D012-012D148.06 KB5ESS Switching Equipment - Interface Module Application SchematicIss 2D Dwg 2D; App 1A Dwg 3A; App 2D Dwg I4D
CD-5D012-023B339.73 KB5ESS Switching Equipment - Switching Module Application SchematicIss 3B Dwg 6B; App 1B Dwg 7B; App 2B Dwg 8B; App 3B Dwg 9B; App 4B Dwg 10B; App 5B Dwg 11B
CD-5D014-014A74.24 KB5ESS Switching Equipment - Application Schematic for 5ESS System (7 Ft. Frames and Cabinets)Iss 4A Dwg I5A; App 1D Dwg 6D
CD-5D014-0220M55.44 KB5ESS Switching Equipment - Application Schematic for 5ESS System (6 Ft. Cabinets)Iss 20M Dwg 30M
CD-5D015-011398.66 KB5ESS Switching Equipment - Modular Metallic Service Unit CircuitIss 1 Dwg 1; App 1D Dwg 2D; App 2A Dwg 3A; App 3D Dwg 4D; App 4A Dwg ID5A; App 5M Dwg 6M; App 6B Dwg 7B; App 7B Dwg 8B; App 8M Dwg 9M
CD-5D016-011279.15 KB5ESS Switching Equipment - Modular Metallic Service Unit InterconnectionIss 1 Dwg 1
CD-5D017-012M105.11 KB5ESS Switching Equipment - Audible and Visual Alarm CircuitIss 2M Dwg 10ME; App 1M Dwg 11M; App 2B Dwg 12B
CD-5D019-021107.40 KB5ESS Switching Equipment - 3 Fan Unit and Alarm Circuit for 6 Foot CabinetIss 1 Dwg 1; App 1B Dwg 2B; App 2B Dwg 3B
CD-5D026-015A217.66 KB5ESS Switching Equipment - Message Switch Control Unit CircuitIss 5A Dwg 5A
CD-5D035-0112.04 MB5ESS Switching Equipment - Digital Service Unit CircuitIss 1 Dwg 1; App 1D Dwg 2D; App 2AC Dwg 3AC; App 3A Dwg 4A; App 4B Dwg 5B; App 5B Dwg 6B
CD-5D037-012D194.61 KB5ESS Switching Equipment - Time Multiplexed Switch Control Unit CircuitIss 2D Dwg 5D; App 1B Dwg 6B
CD-5D043-012D142.12 KB5ESS Switching Equipment - Time Multiplexed Switch Unit CircuitIss 2D Dwg 5D; App 1B Dwg 6B
CD-5D044-013AC177.38 KB5ESS Switching Equipment - Resistor Panel CircuitIss 3AC Dwg 3AC; App 1D Dwg 4D; App 2B Dwg 5B; App 3M Dwg 6M; App 4M Dwg 7M; App 5B Dwg 8B; App 6M Dwg 9M
CD-5D045-0121.13 MB5ESS Switching Equipment - Time Slot Interchanger Unit, Model 2 CircuitIss 2 Dwg 12D
CD-5D048-012A293.78 KB5ESS Switching Equipment - Memory Expansion Unit CircuitIss 2A Dwg 2A; App 1AC Dwg 3AC; App 3B Dwg 5B; App 4A Dwg 6A; App 5B Dwg 7B; App 6B Dwg 8B
CD-5D052-021581.86 KB5ESS Switching Equipment - Line Unit, Model 2 CircuitIss 1 Dwg 1; App 1B Dwg 2B; App 2AC Dwg 3AC; App 3B Dwg 4B; App 4B Dwg 5B; App 5M Dwg 6M; App 6A Dwg 7A
CD-5D053-012D320.10 KB5ESS Switching Equipment - Fuse / Filter Panel CircuitIss 2D Dwg 5D; App 1B Dwg 6B; App 2M Dwg 9M
CD-5D060-012448.63 KB5ESS Switching Equipment - Communication Module Control Unit CircuitIss 2 Dwg 9M; App 1B Dwg 10B; App 2B Dwg 11B; App 3B Dwg 12B; App 4M Dwg 13M; App 5M Dwg 14M
CD-5D061-013B1.03 MB5ESS Switching Equipment - Time Multiplexed Switch Unit Model 2 CircuitIss 3B Dwg 7B
CD-5D064-012B381.58 KBElectronic Switching Systems - 5ESS - Operator Services Position System - Link Adapter UnitIss 2B Dwg 3B
CD-5D066-011450.88 KB5ESS Switching Equipment - Message Switch Peripheral Unit, Model 2Iss 1 Dwg 1; App 1A Dwg 2A
CD-5D070-011189.01 KB5ESS Switching Equipment - +48V DC Power Distribution CircuitIss 1 Dwg 1
CD-5D071-011341.05 KB5ESS Switching Equipment - Operating Support Systems - Interface CircuitIss 1 Dwg 1; App 1B Dwg 2B; App 2A Dwg 3A; App 3B Dwg 4B; App 4M Dwg 5M; App 5B Dwg 6B; App 6M Dwg 7M; App 7B Dwg 8B; App 8M Dwg 9M
CD-5D071-012227.23 KB5ESS Switching Equipment - Operating Support Systems - Interface CircuitIss 2 Dwg 10B; App 1B Dwg 11B; App 2M Dwg 12M; App 3M Dwg 13M
CD-5D074-014B514.28 KB5ESS Switching Equipment - Packet Switch Unit CircuitIss 4B Dwg 12B
CD-5D075-012M246.96 KB5ESS Switching Equipment - Remote Clock Unit CircuitIss 2M Dwg 10M; App 1B Dwg 11B; App 2B Dwg 12B
CD-5D077-011566.69 KB5ESS Switching Equipment - Message Switch Control Unit Model 2 CircuitIss 1 Dwg 1; App 1A Dwg 2A; App 2M Dwg 3M; App 3B Dwg 4B
CD-5D078-011461.74 KB5ESS Switching Equipment - Message Switch Peripheral Unit, Model 3 CircuitIss 1 Dwg 1; App 1D Dwg 2D; App 2M Dwg 3M; App 3B Dwg 4B; App 4B Dwg 5B
CD-5D081-011217.49 KB5ESS Switching Equipment - 6 Fan Unit CircuitIss 1 Dwg 1; App 1D Dwg 2D; App 2M Dwg 3M; App 3B Dwg 4B
CD-5D081-021151.31 KB5ESS Switching Equipment - 6 Fan Unit CircuitIss 1 Dwg 1; App 1B Dwg 2B
CD-5D082-0121.15 MB5ESS Switching Equipment - Message Interface / Clock Unit Model 2 CircuitIss 2 Dwg 3D; App 1D Dwg 4D; App 2AC Dwg 5AC; App 3M Dwg 6M; App 4B Dwg 7B
CD-5D084-011345.29 KB5ESS Switching Equipment - Fuse / Filter Panel 3 CircuitIss 1 Dwg 1; App 1B Dwg 2B; App 2B Dwg 3B; App 3M Dwg 4M
CD-5D085-013A339.99 KB5ESS Switching Equipment - ECL Bus Unit (EBUS) CircuitIss 3A Dwg 11M; App 1B Dwg 12B; App 2B Dwg 13B
CD-5D086-011370.32 KB5ESS Switching Equipment - Transmission Rate Converter Unit CircuitIss 1 Dwg 1; App 1B Dwg 2B; App 2M Dwg 3M; App 3M Dwg 4M
CD-5D086-022577.24 KB5ESS Switching Equipment - Transmission Rate Converter Unit Model 2 CircuitIss 2 Dwg 3B; App 1M Dwg 4M; App 2B Dwg 5B
CD-5D087-011326.67 KB5ESS Switching Equipment - Fuse / Filter Panel 4 CircuitIss 1 Dwg 1; App 1B Dwg 2B; App 2M Dwg 3M
CD-5D089-011312.99 KB5ESS Switching Equipment - Integrated Services Line Unit - Common Shelf CircuitIss 1 Dwg 1; App 1D Dwg 2D; App 2B Dwg 3B; App 3A Dwg 4A; App 4B Dwg 5B
CD-5D090-011300.69 KB5ESS Switching Equipment - Integrated Services Line Unit - Drawer CircuitIss 1 Dwg 1; App 1D Dwg 2D; App 2B Dwg 3B; App 3B Dwg 4B
CD-5D091-011453.55 KB5ESS Switching Equipment - Integrated Services Line Unit CircuitIss 1 Dwg 1; App 1D Dwg 2D; App 2B Dwg 3B; App 3A Dwg 4A; App 4B Dwg 5B
CD-5D092-012B621.29 KB5ESS Switching Equipment - Digital Service Unit Model 2 CircuitIss 2B Dwg 9B; App 1B Dwg 10B; App 2B Dwg 11B; App 3B Dwg 12B; App 4B Dwg 13B
CD-5D094-013B1.86 MB5ESS Switching Equipment - Module Controller and Time Slot Interchange UnitIss 3B Dwg 21B; App 1B Dwg 22B; App 2B Dwg 23B; App 3B Dwg 24B
CD-5D099-012A187.78 KB5ESS Switching Equipment - Test Access Unit CircuitIss 2A Dwg 2A; App 1M Dwg 3M; App 2M Dwg 4M; App 3M Dwg 5M
CD-5D101-01166.40 KBElectronic Switching Systems - No. 5 - Master Control Center and Supplementary Trunk Line Work Station CircuitIss 1 Dwg 1
CD-5D114-011115.35 KB5ESS Switching Equipment - Master Control Center / Trunk Line Workstation (6 Ft. 20 In. Depth) CircuitIss 1 Dwg 1; App 1B Dwg 2B; App 2M Dwg 3M
CD-5D118-012A1.27 MB5ESS Switching Equipment - Switching Module Control Cabinet CircuitIss 2A Dwg 2A; App 1AC Dwg 3AC; App 2D Dwg 4D; App 3B Dwg 5B; App 4A Dwg 6A; App 5D Dwg 7D; App 6D Dwg 8D; App 7A Dwg 9A
CD-5D119-012D243.32 KB5ESS Switching Equipment - Line Trunk Peripheral Cabinet (6 Ft.) CircuitIss 2D Dwg 2D; App 1B Dwg 3B; App 2D Dwg 4D; App 3D Dwg 5D
CD-5D119-021360.56 KB5ESS Switching Equipment - Line Trunk Peripheral CabinetIss 1 Dwg 1; App 1M Dwg 2M; App 2M Dwg 3M; App 3M Dwg 4M; App 4M Dwg 5M; App 5B Dwg 6B
CD-5D123-012A375.81 KB5ESS Switching Equipment - Remote Integrated Services Line Unit Cabinet CircuitIss 2A Dwg 2A; App 3B Dwg 5B
CD-5D129-0131.16 MB5ESS Switching Equipment - Switching Module Processor Unit, Model 2 CircuitIss 3 Dwg 16M; App 1A Dwg 17A; App 2A Dwg 18A; App 3B Dwg 19B; App 4B Dwg 20B
CD-5D130-015A683.80 KB5ESS Electronic Switching Equipment - Miscellaneous Cabinet (6 Ft.) CircuitIss 5A Dwg 25A; App 1B Dwg 26B; App 2B Dwg 27B; App 3B Dwg 28B; App 4B Dwg 29A; App 5B Dwg 30B; App 6B Dwg 31B; App 7B Dwg 32B
CD-5D132-01186.20 KB5ESS Switching Equipment - 5A RSM Application SchematicIss 1 Dwg 1
CD-5D133-011147.13 KB5ESS Switching Equipment - Remote Applications Schematic CircuitIss 1 Dwg 1; App 1AC Dwg 2AC; App 2B Dwg 3B; App 3B Dwg 4B; App 4B Dwg 5B
CD-5D135-012M95.30 KBElectronic Switching Systems - 5ESS - Operator Services Positions System Applications SchematicIss 2M Dwg 10M; App 1B Dwg 11B; App 2M Dwg 12M; App 3B Dwg 13B
CD-5D136-012310.81 KB5ESS Switching Equipment - Message Switch Peripheral Unit CircuitIss 2 Dwg 4AC; App 1B Dwg 5B; App 2B Dwg 6B; App 3AC Dwg 7AC; App 4B Dwg 8B
CD-5D137-011143.19 KBElectronic Switching Systems - 5ESS - Automatic Call Distributor / Management Information System Application SchematicIss 1 Dwg 1; App 1B Dwg 2B; App 2B Dwg 3B; App 3B Dwg 4B; App 4B Dwg 5B
CD-5D139-01191.37 KB5ESS Switching Equipment - Intercabinet Communications CircuitIss 1 Dwg 1; App 1D Dwg 2D
CD-5D140-012464.47 KB5ESS Switching Equipment - Communication Module, Model 2 CircuitIss 2 Dwg 12M; App 1M Dwg 13M; App 2A Dwg 14A; App 3M Dwg 15M; App 4B Dwg 16B; App 5M Dwg 17M
CD-5D142-01192.54 KB5ESS Switching Equipment - Supplementary Trunk Line Work Station (6 Ft. x 20 In. Depth) CircuitIss 1 Dwg 1; App 1B Dwg 2B
CD-5D144-012479.80 KB5ESS Switching Equipment - Communication Module, Model 2 CircuitIss 2 Dwg 8AC; App 1M Dwg 9M; App 2A Dwg 10A; App 4M Dwg 11M; App 5B Dwg 13B; App 6B Dwg 14B
CD-5D144-022420.12 KB5ESS Switching Equipment - Communications Module Model 2 - Double Dual Fabric CircuitIss 2 Dwg 3B; App 1M Dwg 4M; App 2A Dwg 5A
CD-5D145-011421.66 KBElectronic Switching Systems - 5ESS - Operator Services Position System - Power Distribution CabinetIss 1 Dwg 1; App 1M Dwg 2M
CD-5D146-012283.20 KB5ESS Switching Equipment - Message Switch Cabinet CircuitIss 2 Dwg 5B; App 1M Dwg 6M; App 2B Dwg 7B
CD-5D147-012199.48 KB5ESS Switching Equipment - Time Multiplexed Switch Cabinet CircuitIss 2 Dwg 3D; App 1B Dwg 4B; App 2B Dwg 5B
CD-5D148-01120.65 KB5ESS Switching Equipment - Alarm and Status Unit Model 2 CircuitApp 2B Dwg 3B
CD-5D149-011120.33 KBElectronic Switching Systems - 5ESS Switch - Message Detail Records - Translator Applications Processor Application SchematicIss 1 Dwg 1; App 1B Dwg 2B; App 2M Dwg 3M
CD-5D151-012M2.09 MB5ESS Switching Equipment - Module Controller and Time Slot Interchange Unit, Model 2 CircuitIss 2M Dwg 9M; App 1B Dwg 10B; App 2B Dwg 11B; App 3B Dwg 12B; App 4M Dwg 13M; App 5B Dwg 14B; App 6B Dwg 15B; App 7B Dwg 16B; App 8B Dwg 17B; App 9B Dwg 18B
CD-5D151-013B16.01 KB5ESS Switching Equipment - Module Controller and Time Slot Interchange Unit, Model 2 CircuitIss 3B Dwg 19B
CD-5D160-011650.23 KB5ESS Switching Equipment - Switching Module Control Cabinet Model 2 CircuitIss 1 Dwg 1; App 1M Dwg 2M; App 2B Dwg 3B; App 3M Dwg 4M; App 4M Dwg 5M; App 5M Dwg 6M; App 6B Dwg 7B; App 7B Dwg 8B; App 8B Dwg 9B
CD-5D162-011129.98 KB5ESS Switching Equipment - 6 Fan Exhaust Unit CircuitIss 1 Dwg 1
CD-5D168-011195.95 KB5ESS Switching Equipment - 6 Fan Bi-Directional Unit CircuitIss 1 Dwg 1; App 1B Dwg 2B; App 2B Dwg 3B
CD-5D168-021203.12 KB5ESS Switching Equipment - 6 Fan Bi-Directional Unit CircuitApp 1B Dwg 2B; App 2M Dwg 3M; App 3M Dwg 4M; App 4M Dwg 5M
CD-5D171-011155.58 KBElectronic Switching Systems - 5ESS - 3A Simplified Message System - Interface Translator - Application Processor - Application SchematicIss 1 Dwg 1; App 1B Dwg 2B; App 2AC Dwg 3AC; App 3B Dwg 4B; App 4B Dwg 5B; App 5B Dwg 6B; App 6B Dwg 7B
CD-5D178-013B207.93 KBElectronic Switching Systems - 5ESS - Communication Module Processor Unit CircuitIss 3B Dwg 3B
CD-5D180-011750.06 KB5ESS Switching Equipment - Line Unit, Model 3 CircuitIss 1 Dwg 1; App 1M Dwg 2M; App 2M Dwg 3M
CD-5D190-011266.00 KB5ESS Switching Equipment - Modular Fuse Filter Unit CircuitIss 1 Dwg 1
CD-5D191-011170.88 KB5ESS Switching Equipment - Time Multiplexed Switch Unit Model 3 CircuitIss 1 Dwg 1
CD-5D191-012B215.15 KB5ESS Switching Equipment - Time Multiplexed Switch Unit Model 3 CircuitIss 2B Dwg 2B
CD-5D192-011633.15 KB5ESS Switching Equipment - Integrated Services Line Unit 2 CircuitIss 1 Dwg 1
CD-5D194-01163.35 KB5ESS Switching Equipment - Fuse / Filter Unit Model 5 CircuitIss 1 Dwg 1
CD-5D195-0112.94 MB5ESS Switching Equipment - Switch Module Processor Model 4 (SMPU4) CircuitIss 1 Dwg 1; App 1M Dwg 2M; App 2B Dwg 3B
CD-5D196-012B2.03 MB5ESS Switching System - Time Slot Interchange Unit Model 4 (TSIU4) CircuitIss 2B Dwg 2B; App 1M Dwg 3M; App 2B Dwg 4B
CD-5D197-011235.25 KB5ESS Switching Systems - Digital Service Unit Model 3 CircuitIss 1 Dwg 1; App 1M Dwg 2M
CD-5D201-012B389.64 KBElectronic Switching Systems - 5ESS Switching Equipment - Digital Carrier Line Unit CircuitIss 2B Dwg 4B; App 1D Dwg 5D; App 2AC Dwg 6AC; App 3A Dwg 7A; App 4B Dwg 8B; App 5B Dwg 9B; App 6M Dwg 10M; App 7M Dwg 11M; App 8B Dwg 12B
CD-5D202-012A1.78 MBElectronic Switching Systems - 5ESS Switching Equipment - Digital Carrier Line Unit CircuitIss 2A Dwg 2A; App 1M Dwg 3M; App 2B Dwg 4B
CD-5D202-02189.51 KBElectronic Switching Systems - 5ESS Switching Equipment - Digital Carrier Line Unit CircuitIss 1 Dwg 1; App 1B Dwg 2B
CD-5D203-01198.22 KBElectronic Switching Systems - 5ESS Switching Equipment - Digital Carrier Line Unit-Supplement CircuitIss 1 Dwg 1; App 1M Dwg 2M; App 2B Dwg 3B
CD-5D203-02183.38 KBElectronic Switching Systems - 5ESS Switching Equipment - Digital Carrier Line Unit-Supplement CircuitIss 1 Dwg 1; App 1 Dwg 2B
CD-5D204-011180.48 KB5ESS Switching Equipment - Digital Line Trunk Unit - Remote Integrated Services Line Unit CircuitIss 1 Dwg 1; App 1B Dwg 2B; App 2B Dwg 3B; App 3B Dwg 4B; App 4B Dwg 5B
CD-5D205-012B119.01 KB5ESS Switching Equipment - Digital Line Trunk Unit Model 2Iss 2B Dwg 4B; App 1B Dwg 5B
CD-5D300-012D256.24 KBElectronic Switching Systems - 5ESS - Trunk Unit CircuitIss 2D Dwg 5D; App 1A Dwg 6A; App 2D Dwg 7D; App 3AC Dwg 8AC; App 4AC Dwg 9AC
CD-5D301-011850.82 KB5ESS Switching Equipment - IDCU Integrated Digital Carrier Unit CircuitIss 1 Dwg 1; App 1M Dwg 2M
CD-5D401-011679.47 KB5ESS Switching Equipment - Facilities Interface Unit Model 2 CircuitIss 1 Dwg 1; App 1B Dwg 2B; App 2AC Dwg 3AC; App 3A Dwg 4A; App 4AC Dwg 5AC; App 5A Dwg 6A; App 6M Dwg 7M; App 7B Dwg 8B
CD-5D401-021518.98 KB5ESS Switching Equipment - Facilities Interface Unit Model 3 UnitApp 2M Dwg 3M; App 3A Dwg 4A; App 4B Dwg 5B
CD-5D500-011156.91 KBElectronic Switching Equipment - 5ESS/International - Power Line Filter Unit CircuitIss 1 Dwg 1
CD-5D501-011108.79 KB5ESS Switching Equipment - Digital Line and Trunk Unit Model 3Iss 1 Dwg 1; App 1B Dwg 2B
CD-5D502-01164.81 KBElectronic Switching Systems - 5ESS - Switch Communications Adapter Translator - Application Processor Application SchematicIss 1 Dwg 1
CD-5D503-011134.05 KB5ESS Switching Equipment - Enhanced 911 Service Adjunct (ESA) CircuitIss 1 Dwg 1; App 1M Dwg 2M; App 3B Dwg 4B
CD-5D503-022M146.61 KB5ESS Switching Equipment - Enhanced 911 Service Adjunct (ESA) Circuit (Single and Multiple Switch Applications)Iss 2M Dwg 10M; App 1M Dwg 11M
CD-5D505-011109.22 KBElectronic Switching Systems - 5ESS - Advanced Communication Package Version 7 Application SchematicIss 1 Dwg 1; App 1M Dwg 2M
CD-5D507-011143.86 KB5ESS Switching Equipment - OSPS-AP Cluster Cabinet CircuitIss 1 Dwg 1; App 1M Dwg 2M
CD-5D508-011452.97 KB5ESS Switching Equipment - Message Switch Control Unit Model 3 CircuitIss 1 Dwg 1; App 1B Dwg 2B; App 2M Dwg 3M
CD-5D511-01154.60 KBElectronic Switching Systems - 5ESS - Micro Electronic Directory System - Application Processor Application SchematicIss 1 Dwg 1
CD-5D513-011946.19 KB5ESS Switching Systems - Communications Module Unit CircuitIss 1 Dwg 1; App 1A Dwg 2A; App 2M Dwg 3M; App 3M Dwg 4M; App 4B Dwg 5B
CD-5D515-011216.31 KBInternational 5ESS Switching Equipment - Mesh Earthing Building CircuitIss 1 Dwg 1
CD-5D517-011188.21 KB5ESS Switching Equipment - Remote Line Group Unit CircuitIss 1 Dwg 1
CD-5D518-011171.48 KB5ESS Switching Systems - Switching Module 2000 Application SchematicIss 1 Dwg 1; App 1B Dwg 2B
CD-5D519-011189.89 KB5ESS Switching Equipment - Application Schematic for the 5ESS-2000 Switch (Administrative Workstation and Very Compact Digital Exchange)Iss 1 Dwg 1; App 1M Dwg 2M; App 2M Dwg 3M; App 3M Dwg 4M
CD-5D523-0111.31 MB5ESS Switching Equipment - Packet Switch Unit Model 2Iss 1 Dwg 1
CD-5D524-01141.57 KBElectronic Switching Systems - 5ESS - Ovation Voice Processing System Application SchematicIss 1 Dwg 1
CD-5D525-011152.83 KB5ESS Switching Equipment - Digital Network Unit-SONET (DNU-S) CircuitIss 1 Dwg 1
CD-5D527-01141.66 KBElectronic Switching Systems - 5ESS - Intelligent Network Application SchematicIss 1 Dwg 1
CD-5D530-011356.76 KB5ESS Switching Equipment - Combined Services Unit CircuitApp 1B Dwg 2B
CD-5D534-011186.56 KB5ESS Switching Systems - Administrative Workstation / Switching Module 2000 Application SchematicIss 1 Dwg 1
CD-5D536-0112.07 MB5ESS Switching Equipment - Module Controller and Time Slot Interchanger Unit Model 3 CircuitIss 1 Dwg 1
CD-5E001-0111.79 MBPBX Systems - Trunk Circuit to Central Office for No. 701A, 701B, 701PK, 702A, 711A, 711B, 711PK or 740E or Two-Way - Manual and Dial Selected for No. 701A, 701B, 701PK or 740E or Two-Way - Manual Selected for No. 800AIss 1 Dwg 1; App 1D Dwg 2D; App 2D Dwg 3D; App 3D Dwg 4D; App 4AC Dwg 4AC
CD-5E001-013B7.95 MBPBX Systems - Trunk Circuit to Central Office for No. 701A, 701B, 701PK, 702A, 711A, 711B, 711PK, 740E or 756A or Two-Way-Manual and Dial Selected for No. 701A, 701B, 701PK or 740E or Two-Way-Manual Selected for No. 800AIss 3B Dwg 10B; App 1D Dwg 11D
CD-5E003-011699.52 KBPBX Systems - No. 756A - Inward Restriction CircuitIss 1 Dwg 1; App 1D Dwg 2D; App 2D Dwg 3D
CD-5E021-012D2.01 MBPBX Systems - No. 756A - Station Message Register Pulse and Surcharge CircuitIss 2D Dwg 4D; App 1B Dwg 5B; App 2A Dwg 6A; App 3D Dwg 7D
CD-5E029-012D2.10 MBPBX Systems - No. 756A - Make Busy & Busy Display CircuitIss 2D Dwg 5D; App 1D Dwg 6D
CD-5E037-011597.27 KBPBX Systems - Voltage Reduction Detector at Midpoint of Voltage Divider NetworkIss 1 Dwg 1; App 1D Dwg 2D; App 2D Dwg 3D
CD-5X201-0112.15 MB5ESS Switching Equipment - Global Digital Service Unit - Export CircuitIss 1 Dwg 1; App 2B Dwg 3B; App 3A Dwg 4A; App 4B Dwg 5B; App 5B Dwg 6B
CD-5X202-011152.81 KB5ESS Export - Periodic Pulse Metering CircuitIss 1 Dwg 1
CD-5X204-011268.51 KBElectronic Switching Systems - 5ESS Switching Equipment - Digital Line Trunk Unit - Export CircuitIss 1 Dwg 1; App 2B Dwg 3B
CD-5X205-011535.40 KB5ESS Switching Equipment - Line Unit Model 2 Export CircuitIss 1 Dwg 1; App 1AC Dwg 2AC; App 2A Dwg 3A
CD-5X213-012M369.98 KB5ESS Switching Equipment - Echo Canceler Signaling Unit CircuitIss 2M Dwg 2M
CD-5X214-011189.80 KBElectronic Switching Systems - 5ESS Operator Services Position System (OSPS) International Application SchematicIss 1 Dwg 1; App 1B Dwg 2B; App 2B Dwg 3B; App 3M Dwg 4M; App 4B Dwg 5B; App 5M Dwg 6M; App 6B Dwg 7B; App 7B Dwg 8B; App 8AC Dwg 9AC
CD-5X214-012B84.57 KBElectronic Switching Systems - 5ESS Operator Services Position System (OSPS) International Application SchematicIss 2B Dwg 10B; App 1B Dwg 11B; App 2B Dwg 12B; App 3B Dwg 13B
CD-5X215-021167.32 KB5ESS Switching Equipment - Export Dataset Cabinet Application Schematic CircuitIss 1 Dwg 1; App 1M Dwg 2M; App 2B Dwg 3B; App 3A Dwg 4A; App 4B Dwg 5B; App 5B Dwg 6B
CD-5X220-011114.29 KB5ESS Switching Equipment - International Modem Pooling Cabinet Application SchematicIss 1 Dwg 1
CD-5X221-011322.17 KB5ESS Switching Equipment - Digital Conference Switching System Cabinet CircuitIss 1 Dwg 1; App 1M Dwg 2M; App 2B Dwg 3B; App 3B Dwg 4B
CD-5X224-01133.62 KB5ESS Switching Equipment - Digital Test Access CircuitApp 1M Dwg 2M; App 2M Dwg 3M
CD-62440-0131561.94 KBToll Systems - Switchboard No. 3 and Tandem Switchboard No 3 - Key SheetIss 31 Dwg 31
CD-62831-018D780.77 KBToll Systems - Toll Switchboard No. 3, 3C, 3CL or 3CF - Tone Jack CircuitIss 8D Dwg 15D; App 1B Dwg 16B
CD-64098-013B741.41 KBToll Systems - Transmission Measuring - 1U Amplifier Rectifier with Battery SupplyIss 3B Dwg 15B; App 1B Dwg 16B
CD-64741-013D573.70 KBToll Systems - Toll Switchboard No. 3C, 3CL or 3CF - Toll Testboard No. 17B or 18B - Position Dial Circuit for Repeated Dialing Arranged for Reassociation of Dial Ckt. And for Automatic Start of RingingIss 3D Dwg 16D; App 1D Dwg 17D; App 2D Dwg 18D
CD-64800-0115407.23 KBToll Systems - Toll Switchboard No. 3C or 3CL - KeysheetIss 15 Dwg 15
CD-65657-0111AC5.77 MBPBX Systems - No. 701A, 701B, 701PK, 702A, 711A, 711B, 711PK or 740E - One-Way Trunk Circuit to Central Office - Outgoing Dial Selected - or No. 701A, 701B, 701PK, or 740E - Two-Way Trunk Circuit to Central Office - Manual and Dial SelectedIss 11AC Dwg 24AC; App 1D Dwg 25D; App 2D Dwg 26D; App 3D Dwg 27D; App 4AC Dwg 28AC; App 5D Dwg 29D
CD-65677-014D319.32 KBPBX Systems - Test Terminal Circuit for Battery and GroundIss 4D Dwg 5D; App 1D Dwg 6D
CD-65680-0113D849.85 KBPBX Systems - No. 507A or 507B - Station Line, Trunk, Connecting, Telephone, Ringing, Buzzer and 2 Way Ringdown Tie Trunk Circuits Arranged for Use with Manual or Dial Central OfficesIss 13D Dwg 13D
CD-65718-0110B17.02 MBPBX Systems - Tie Trunk Circuit - No. 552A, 552D, 556A, 605A, 606A, 606B, 607A, 607B, 608A, 608B, 608D, 701A, 701B, 701PK, 702A, 711A, 711B, 711PK, 740E, 756A, 757A, or 800A - Outgoing Manual and Dial Selected and Dial Repeating Incoming Pulse Correcting with or without E and M Lead SupervisionIss 10B Dwg 28B
CD-65718-019AC14.13 MBPBX Systems - Tie Trunk Circuit - No. 552A, 552D, 556A, 605A, 606A, 606B, 607A, 607B, 608A, 608B, 608D, 701A, 701B, 701PK, 702A, 711A, 711B, 711PK, 740E, 756A, 757A or 800A - Outgoing Manual and Dial Selected and Dial Repeating Incoming Pulse Correcting with or without E and M Lead SupervisionIss 9AC Dwg 21AC; App 1D Dwg 22D; App 2AC Dwg 23AC; App 3D Dwg 24D; App 4B Dwg 25B
CD-65719-016D831.66 KBPBX Systems - No. 550B, 550C, 550SC, 551A, 551B, 551D, 552A, 552B, 552D, 552E, 555, 556A, 605A, 606B, 607A, 607B, or 608A - Manual Conference Circuit with Voice Repeater Arranged for a Maximum of 4 or 5 Simultaneous Connections (Man Conf)Iss 6D Dwg 6D; App 1D Dwg 7D
CD-65719-018D620.76 KBPBX Systems - No. 550B, 550C, 550SC, 551A, 551B, 551D, 552A, 552B, 552D, 552E, 555, 556A, 605A, 606B, 607A, 607B, or 608A - Manual Conference Circuit with Voice Repeater Arranged for a Maximum of 4 or 5 Simultaneous ConnectionsApp 1D Dwg 10D
CD-65729-0111A177.44 KBPBX Systems - No. 557B - Secretarial Line and Central Office Trunk CircuitsIss 11A Dwg 17A; App 1B Dwg 18B
CD-65731-0112B19.17 KBPBX Systems - No. 557B - Cord, Telephone, Dial, Auxiliary Signal, Station Line, Ringing and Battery, Fuse Alarm, Station Conference Position Splitting and Grouping CircuitsApp 6A Dwg 18A
CD-65731-0114A175.88 KBPBX Systems - No. 557B - For Telephone Answering Service Position and Station CircuitsIss 14A Dwg 21A; App 1B Dwg 22B
CD-65733-015D304.59 KBPBX Systems - No. 507A or 507B - 2 Way Automatic Tie Trunk CircuitIss 5D Dwg 5D
CD-65741-015D5.91 MBPBX Systems - No. 756A - Line, Link and Marker CircuitIss 5D Dwg 23D; App 1D Dwg 24D; App 2D Dwg 25D; App 3AC Dwg 26AC
CD-65741-019D19.20 MBPBX Systems - No. 756A - Line, Link and Marker CircuitIss 9D Dwg 46D; App 1D Dwg 47D; App 2B Dwg 48B; App 3A Dwg 49A; App 4B Dwg 50B; App 5B Dwg 51B; App 6D Dwg 52D; App 7D Dwg 53D
CD-65742-0112B1.49 MBPBX Systems - No. 756A - Dial Pulse Register CircuitIss 12B Dwg 18B; App 1B Dwg 19B; App 2B Dwg 20B; App 3B Dwg 21B; App 4D Dwg 22D; App 5AC Dwg 23AC
CD-65742-0114D4.03 MBPBX Systems - No. 756A - Dial Pulse Register CircuitIss 14D Dwg 30D; App 1D Dwg 31D; App 2D Dwg 32D
CD-65744-011932.38 KBPBX Systems - No. 756A - Traffic Register Circuit for Internal Traffic and Trouble RegistersIss 1 Dwg 1; App 1D Dwg 2D; App 2D Dwg 3D
CD-65745-015AC611.75 KBPBX Systems - No. 756A - Dial Conference Circuit Arranged for a Maximum of 5 Simultaneous ConnectionsIss 5AC Dwg 5AC; App 1D Dwg 6D
CD-65746-012B1021.88 KBPBX Systems - No. 756A - PBX Cabling DiagramIss 2B Dwg 3B; App 10D Dwg 13D; App 11B Dwg 14B; App 12D Dwg 15D; App 13B Dwg 16B; App 14D Dwg 17D; App 15B Dwg 18B; App 16B Dwg 19B; App 17B Dwg 20B; App 18D Dwg 21D; App 19AC Dwg 22AC; App 1B Dwg 4B; App 20B Dwg 23B; App 21D Dwg 24D; App 22D Dwg 25D; App 23D Dwg 26D; App 24D Dwg 27D; App 2D Dwg 5D; App 3D Dwg 6D; App 4B Dwg 7B; App 5B Dwg 8B; App 6D Dwg 9D; App 7D Dwg 10D; App 8B Dwg 11B; App 9D Dwg 12D
CD-65746-013D288.27 KBPBX Systems - No. 756A - PBX Cabling DiagramIss 3D Dwg 41D; App 10B Dwg 51B; App 11B Dwg 52B; App 12D Dwg 53D; App 1B Dwg 42B; App 2B Dwg 43B; App 3A Dwg 44A; App 4A Dwg 45A; App 5B Dwg 46B; App 6D Dwg 47D; App 7B Dwg 48B; App 8D Dwg 49D; App 9D Dwg 50D
CD-65746-014D571.80 KBPBX Systems - No. 756A - PBX Cabling DiagramIss 4D Dwg 54D; App 1D Dwg 55D; App 2D Dwg 56D
CD-65747-017D899.46 KBPBX Systems - No. 558A System, 756A, 800A, 801A, 812A PBX or Switching System No. 400 - Loudspeaker Paging Trunk CircuitIss 7D Dwg 10D; App 1D Dwg 11D; App 2D Dwg 12D
CD-65750-014B460.63 KBPBX Systems - No. 756A - Junctor CircuitIss 4B Dwg 5B; App 1B Dwg 6B; App 2D Dwg 7D; App 3D Dwg 8D
CD-65750-015D1002.47 KBPBX Systems - No. 756A - Junctor CircuitIss 5D Dwg 10D
CD-65752-0111D3.86 MBPBX Systems - No. 756A - Two Way Trunk Circuit to Central OfficeIss 11D Dwg 18D
CD-65752-0113B10.59 MBPBX Systems - No. 756A - Two-Way Trunk Circuit to Central OfficeIss 13B Dwg 35B; App 1A Dwg 36A; App 2B Dwg 37B; App 3B Dwg 38B; App 4B Dwg 39B; App 5B Dwg 40B; App 6D Dwg 41D; App 7D Dwg 42D; App 8D Dwg 43D
CD-65753-017B800.38 KBPBX Systems - No. 756A - Attendant Trunk CircuitIss 7B Dwg 11B; App 1B Dwg 12B; App 2D Dwg 13D
CD-65753-018D2.42 MBPBX Systems - No. 756A - Attendant Trunk CircuitIss 8D Dwg 18D; App 1D Dwg 19D; App 2D Dwg 20D; App 3D Dwg 21D
CD-65754-013D696.65 KBPBX Systems - No. 756A - Busy Tone Trunk CircuitIss 3D Dwg 5D; App 1D Dwg 6D; App 2D Dwg 7D
CD-65756-015D3.82 MBPBX Systems - No. 756A - Tie Trunk Circuit - Outgoing Manual and Dial Selected with 2 Second Ringing Signal - Incoming RingdownIss 5D Dwg 8D; App 1D Dwg 9D; App 2D Dwg 10D
CD-65757-015B1.23 MBPBX Systems - No. 756A - Cordless Position CircuitIss 5B Dwg 6B; App 1D Dwg 7D; App 2D Dwg 8D; App 3D Dwg 9D
CD-65757-016D3.19 MBPBX Systems - No. 756A - Cordless Position CircuitIss 6D Dwg 14D; App 1D Dwg 15D; App 2D Dwg 16D; App 3D Dwg 17D
CD-65761-0112B978.42 KBPBX Systems - No. 701B, 701PK, 711B, or 711PK - Miscellaneous Alarm CircuitIss 12B Dwg 26B; App 1D Dwg 27D
CD-65761-0216.45 MBPBX Systems - No. 701B or 711B - Miscellaneous Alarm CircuitIss 1 Dwg 1; App 1B Dwg 2B; App 2D Dwg 3D; App 3D Dwg 4D
CD-65771-017D1.40 MBPBX Systems - No. 552A, 552B, 552D, 552E, 605A, 607A, 607B, 701B, 701PK, 711B or 711PK - Ringing Leads CircuitIss 7D Dwg 11D; App 1D Dwg 12D; App 2D Dwg 13D; App 3D Dwg 14D
CD-65773-015D104.85 KBPBX Systems - No. 552A, 552D, 556A, 605A, 608A, 701B, 711B, or 740E - Battery Cut-Off CircuitIss 5D Dwg 6D
CD-65774-014D542.53 KBPBX Systems - No. 701B, 701PK, 711B or 711PK - Traffic Register Circuit - No. 607A, 607B or 608A - Switchboard Peg Count CircuitIss 4D Dwg 9D
CD-65778-014D312.95 KBPBX Systems - No. 552A, 552B, 552D, 552E, 605A, 607A, 607B, or 608A - Jack Circuit for Attendant Switchboard PositionsIss 4D Dwg 6D; App 1D Dwg 7D
CD-65779-015B817.79 KBPBX Systems - Fuse Alarm Circuit for Relay Rack or Apparatus Cabinet Mounted Equipment - Dial or Manual PBXIss 5B Dwg 7B
CD-65786-012D1.16 MBP.B.X. Systems - No. 552A, 552B, 552D or 552E - Auxiliary Signal, Battery Cut-Off, Buzzer, Fuse Alarm and Night Alarm CircuitIss 2D Dwg 2D; App 1D Dwg 3D; App 2D Dwg 4D; App 3D Dwg 5D
CD-65787-0111.36 MBPBX Systems - No. 552A, 552B, 552D, 552E, or 605A - Attendant Telephone and Dial CircuitIss 1 Dwg 1; App 1D Dwg 2D; App 2D Dwg 3D; App 3D Dwg 4D; App 6D Dwg 7D
CD-65792-015B3.75 MBPBX Systems - No. 700C, 701A, 701B, or 702A - Incoming Trunk Circuit for Inward Dialing from Step-by-Step or Crossbar Tandem Office or Distant PBX Arranged to Transfer Calls to PBX AttendantIss 5B Dwg 10B; App 1B Dwg 11B; App 2D Dwg 12D
CD-65799-0111.17 MBPBX Systems - No. 701A, 701B or 740E - Auxiliary Line Circuit for Use Between Selector Bank Multiple and Station Line Circuit to Provide for Single Digit Access to the Associated StationsIss 1 Dwg 1; App 1B Dwg 2B
CD-65816-016AC1.33 MBPBX Systems - No. 701B - Register Sender Circuit Arranged to Convert 2 out of 5 Ground Pulses to Dial PulsesIss 6AC Dwg 12AC; App 1D Dwg 13D
CD-65901-014D4.30 MBPBX Systems - No. 701A, 701B, 701PK, 702A, 711A, 711B or 711PK - Line or Trunk Finder Circuit with Associated Common Group and Subgroup Circuit for Line Finder Applications Arranged for Restricted ServiceApp 8D Dwg 17D; App 9B Dwg 18B
CD-65901-015B3.89 MBPBX Systems - No. 701A, 701B, 701PK, 702A, 711A, 711B or 711PK - Line or Trunk Finder Circuit with Associated Common Group and Subgroup Circuit for Line Finder Applications Arranged for Restricted ServiceIss 5B Dwg 19B; App 1D Dwg 20D
CD-65910-021D196.01 KBPBX Systems - No. 756A - Current Drain DataIss 1D Dwg 2D; App 1D Dwg 3D
CD-65942-013B1.15 MBPBX Systems - No. 756A - Auxiliary Relay Circuit for Direct Station Selection from StationsIss 3B Dwg 6B; App 1B Dwg 7B; App 2D Dwg 8D
CD-66010-014D972.41 KBPBX Systems - No. 701A, 701B, 711A or 711B - Second Selector CircuitIss 4D Dwg 23D
CD-66011-013D2.56 MBPBX System - No. 552A, 605A or 701A - Cord Circuit for Use in Multiple or Nonmultiple SwitchboardsIss 3D Dwg 3D; App 1D Dwg 4D; App 2D Dwg 5D
CD-66016-011931-06-1912.27 MBP.B.X. Systems - No. 605-A, 701-A, or 711-A - Ringing Leads CircuitIss 1 Dwg 1; App 1A Dwg 2A; App 2D Dwg 3D; App 3D Dwg 4D; App 4D Dwg 5D
CD-66018-011933-11-202A2.04 MBP.B.X. Systems - No. 605-A or 701-A - Night Alarm Circuit for Use in Multiple SwitchboardIss 2A Dwg 2A; App 1D Dwg 3D; App 2D Dwg 4D; App 3A Dwg 5A
CD-66019-011931-07-083D2.56 MBP.B.X. Systems - No. 605-A - Fuse and Power Alarm CircuitIss 3D Dwg 3D; App 1A Dwg 4A; App 2D Dwg 5D
CD-66020-0113.72 MBP.B.X. Systems - No. 552-D, 552-E, 605-A or 701-A - Station Line Circuit for Multiple Switchboard with or without Line RelayIss 1 Dwg 1; App 10D Dwg 11D; App 11D Dwg 12D; App 12D Dwg 13D; App 1A Dwg 2A; App 2D Dwg 3D; App 3D Dwg 4D; App 4D Dwg 5D; App 5A Dwg 6A; App 6D Dwg 7D; App 7D Dwg 8D; App 8B Dwg 9B; App 9D Dwg 10D
CD-66034-012D1.45 MBPBX Systems - No. 701A or 740E - Intercepting Trunk Circuit from Connector TerminalsIss 2D Dwg 8D; App 1D Dwg 9D; App 2D Dwg 10D; App 3D Dwg 11D; App 4D Dwg 12D; App 5D Dwg 13D; App 6D Dwg 14D; App 7D Dwg 15D; App 8D Dwg 16D
CD-66035-015D1.42 MBP.B.X. Systems - No. 701A or 740E - Trunk Circuit to P.B.X. Attendant from Selector Levels for Use on Calls to Attendant from Dial Stations or for Use with One Way Toll Diverting Trunks to Panel OfficeIss 5D Dwg 15D; App 1D Dwg 16D; App 2D Dwg 17D; App 3D Dwg 18D; App 4D Dwg 19D; App 5D Dwg 20D
CD-66036-019D626.04 KBP.B.X. Systems - No. 552A, 552D, 556A, 605A, 701A, 740E or 740AX - Battery Cut-Off CircuitIss 9D Dwg 19D; App 1D Dwg 20D; App 2D Dwg 21D
CD-66037-015D1.03 MBPBX Systems - No. 701A, 701B, 701PK, 711A, 711B, or 711PK - Test Line Circuit for Testing Connector and Selector Connector CircuitsIss 5D Dwg 18D; App 1D Dwg 19D; App 2B Dwg 20B; App 3D Dwg 21D; App 4D Dwg 22D; App 5D Dwg 23D; App 6AC Dwg 24AC; App 7D Dwg 25D
CD-66037-016D810.84 KBPBX Systems - No. 701A, 701B, 701PK, 711A, 711B, or 711PK - Test Line Circuit for Testing Connector and Selector Connector CircuitsIss 6D Dwg 26D; App 1D Dwg 27D
CD-66073-0117B503.30 KBPBX systems - No. 701A, 701B, 711A, 711B, 740A, 740B, 740C or 740E - Test Set Circuit for Testing Line Finder, Trunk Finder, Connector, Selector and Selector Connector CircuitsIss 17B Dwg 17B; App 1D Dwg 18D
CD-66129-013D1.79 MBPBX Systems - No. 605A or 701A - Attendant's Telephone and Dial CircuitIss 3D Dwg 13D
CD-66137-014D7.37 MBP.B.X. Systems - No. 606B, 701A, or 711A - Miscellaneous Alarm CircuitIss 4D Dwg 10D; App 1D Dwg 11D; App 2D Dwg 12D; App 3D Dwg 13D
CD-66142-0115D1.50 MBP.B.X. Systems - P.B.X. No. 740A, 740B or 740C - Selector Connector Circuit - Regular - Arranged for Restricted Service and for Completing Incoming Trunk CallsIss 15D Dwg 15D
CD-66144-016D583.52 KBPBX Systems - No. 701A, 701B, 711A, 711B or 740E - Connector Circuit - Rotary Hunting - One RingIss 6D Dwg 22D
CD-66144-017D2.51 MBPBX Systems - No. 701A, 701B, 701PK, 711A, 711B, 711PK, or 740E - Connector Circuit - Rotary Hunting - One RingIss 7D Dwg 23D; App 1D Dwg 24D; App 2D Dwg 25D; App 3D Dwg 26D; App 4AC Dwg 27AC; App 5AC Dwg 28AC; App 6D Dwg 29D; App 7D Dwg 30D; App 8D Dwg 31D; App 9B Dwg 32B
CD-66151-011935-01-047D799.14 KBPBX Systems - No. 750A - Trunk Circuit to Central OfficeIss 7D Dwg 7D
CD-66151-0111D93.20 KBPBX Systems - No. 750A - Trunk Circuit to Central OfficeIss 11D Dwg 11D
CD-66159-011931-12-2910D1.03 MBP.B.X. Systems - No. 750A - Line and Link CircuitIss 10D Dwg 10D
CD-66159-0116D119.47 KBP.B.X. Systems - No. 750A - Line and Link CircuitIss 16D Dwg 16D
CD-66160-011931-10-235D52.40 KBP.B.X. Systems - No. 750-A - Station CircuitIss 5D Dwg 5D
CD-66161-0114D109.32 KBP.B.X. Systems - No. 750A - Tone, Ringing and Alarm Circuits and Common Timing CircuitIss 14D Dwg 14D
CD-66197-0114D315.52 KBP.B.X. Systems - Grounding CircuitIss 14D Dwg 18D; App 1D Dwg 19D
CD-66198-0112.91 MBPBX Systems - No. 552A, 552B, 552D, 552E, 605A, or 701A - Cord CircuitIss 1 Dwg 1; App 1D Dwg 2D; App 2D Dwg 3D; App 3D Dwg 4D; App 4D Dwg 5D; App 5D Dwg 6D; App 6 Dwg 7; App 7D Dwg 8D; App 8D Dwg 9D
CD-66273-011766.15 KBPBX Systems - No. 552A, 552B, 552D, 552E or 605A - Position Grouping Key CircuitIss 1 Dwg 1; App 1D Dwg 2D; App 2D Dwg 3D; App 3D Dwg 4D; App 4D Dwg 5D; App 5D Dwg 6D
CD-66359-014B1.81 MBPBX Systems - No. 701A, 701B, 701PK, 711A, 711B, 711PK or 740E - First Selector Circuit Arranged for Restricted ServiceIss 4B Dwg 21B; App 1D Dwg 22D; App 2D Dwg 23D; App 3D Dwg 24D; App 4D Dwg 25D
CD-66360-015D1.84 MBPBX Systems - No. 701A, 701B, 701PK, 711A, 711B, 711PK or 740E - Incoming First Selector Circuit Arranged for Operation with Dial Repeating Tie Trunks or Incoming Trunks for Inward DialingIss 5D Dwg 22D; App 1D Dwg 23D; App 2D Dwg 24D; App 3AC Dwg 25AC; App 4D Dwg 26D; App 5D Dwg 27D; App 6D Dwg 28D; App 7B Dwg 29B
CD-66361-011935-02-183D185.96 KBP.B.X. Systems - No. 750A - Emergency Transfer Key CircuitIss 3D Dwg 3D
CD-66425-013D1.82 MBP.B.X. Systems - No. 552A, 552B, 552D, 552E, 605A or 701A - Attendants Telephone and Dial CircuitIss 3D Dwg 7D; App 1D Dwg 8D; App 2B Dwg 9B; App 3D Dwg 10D; App 4D Dwg 11D; App 5D Dwg 12D
CD-66437-011932-04-182D576.64 KBP.B.X. Systems - No. 750-A - Station CircuitIss 2D Dwg 2D
CD-66437-014D92.50 KBP.B.X. Systems - No. 750A - Station CircuitIss 4D Dwg 4D
CD-66438-011936-07-094D838.01 KBP.B.X. Systems - No. 750A - Tone, Ringing, Alarm and Common Timing SystemsIss 4D Dwg 4D
CD-66438-017D124.40 KBP.B.X. Systems - P.B.X. No. 750A - Tone, Ringing, Alarm and Common Timing CircuitsIss 7D Dwg 7D
CD-66462-013D828.67 KBPBX Systems - No. 552A, 552B, 552E, 556A, 605A or 608A - Manual Conference Circuit Arranged for a Maximum of 4 or 5 Simultaneous ConnectionsIss 3D Dwg 9D; App 1D Dwg 10D; App 2D Dwg 11D; App 3D Dwg 12D
CD-66503-013D341.39 KBPBX Systems - No. 755A - Trunk CircuitIss 3D Dwg 7D; App 1B Dwg 8B; App 2D Dwg 9D; App 3D Dwg 10D; App 4D Dwg 11D
CD-66504-017D466.69 KBPBX System - No. 755A - Line, Line Switch, and Call Allotter CircuitIss 7D Dwg 21D
CD-66506-015D624.33 KBPBX Systems - No. 755A - Tone, Ringing, Alarm and Common Timing CircuitIss 5D Dwg 6D; App 1D Dwg 7D; App 2D Dwg 8D; App 3D Dwg 9D; App 4D Dwg 10D; App 5B Dwg 11B; App 6D Dwg 12D; App 7D Dwg 13D
CD-66507-017D194.73 KBP.B.X. Systems - No. 755A - Station Circuit with Emergency Transfer Key and Control Key CircuitIss 7D Dwg 10D
CD-66507-0113D174.46 KBP.B.X. Systems - No. 755A - Station Circuit with Emergency Transfer Key and Control Key CircuitIss 13D Dwg 13D
CD-66574-014D781.56 KBPBX Systems - No. 552A, 552D, 605A, or 701A - Cord and Dial Circuits - Modification of Existing Circuits to Extend Trunk and Station Range and to Remove Ringing BridgeIss 4D Dwg 5D; App 1D Dwg 6D
CD-66611-012D390.29 KBPBX Systems - No. 755A - Link and Link Allotter CircuitIss 2D Dwg 7D
CD-66715-016D1.31 MBPBX Systems - No. 701B, 701PK, 711B or 711PK - Station Line Circuit - Individual or 2 Party Selective Ringing with or without Restricted ServiceIss 6D Dwg 15D; App 1D Dwg 16D; App 2D Dwg 17D; App 3D Dwg 18D; App 4D Dwg 19D
CD-66716-014D1.15 MBPBX Systems - No. 701A, 701B, 701PK or 740E - Intercepting Trunk Circuit from Vacant Selector Levels - Attendant Trunk Circuit for Use Where Tie Trunk Circuits are Connected to Station Line Circuits, Incoming Selector, or Selector Connector CircuitsIss 4D Dwg 4D; App 1D Dwg 5D; App 2D Dwg 6D; App 3D Dwg 7D; App 4D Dwg 8D; App 5D Dwg 9D
CD-66717-016D1.28 MBPBX Systems - No. 701A, 701B, 701PK or 740E - Attendant Trunk Circuit from Selector or Selector Connector LevelsIss 6D Dwg 9D; App 1D Dwg 10D; App 2D Dwg 11D; App 3D Dwg 12D; App 4D Dwg 13D; App 5D Dwg 14D
CD-66796-012D617.48 KBPBX Systems - No. 756A - Alarm, Transfer & Test CircuitIss 2D Dwg 4D
CD-66796-014B1.41 MBPBX Systems - No. 756A - Alarm, Transfer and Test CircuitIss 4B Dwg 14B; App 1D Dwg 15D; App 2D Dwg 16D
CD-66892-012A1.42 MBPBX Systems - 701A, 701B, 711A, 711B or 740E - "TOUCH-TONE" to Dial Pulse Solid State Converter Circuit - 14 DigitsIss 2A Dwg 2A; App 1B Dwg 3B; App 2A Dwg 4A; App 3B Dwg 5B
CD-66902-012D6.34 MBPBX Systems - No. 756A - Dial Conference Trunk Circuit - Station ControlledIss 2D Dwg 5D; App 1D Dwg 6D; App 2A Dwg 7A; App 3D Dwg 8D; App 4B Dwg 9B; App 5D Dwg 10D
CD-66908-012A3.42 MBPBX Systems - No. 756A - Dial Conference Trunk Circuit - Attendant ControlledIss 2A Dwg 4A; App 1B Dwg 5B; App 2B Dwg 6B; App 3B Dwg 7B; App 4D Dwg 8D
CD-66909-012D1.88 MBPBX Systems - No. 756A - Station Dial Transfer Controller CircuitIss 2D Dwg 6D; App 1B Dwg 7B; App 2D Dwg 8D
CD-66910-012D2.07 MBPBX Systems - No. 756A - Auxiliary Position Circuit for Remote Answering of Trunks and Inward Completion By Any StationIss 2D Dwg 5D; App 1D Dwg 6D
CD-66911-013D1.28 MBPBX Systems - No. 756A - Busy Verification Auxiliary Trunk CircuitIss 3D Dwg 7D; App 1D Dwg 8D
CD-66920-011165.15 KBPBX Systems - No. 756A - Feature Cabling DiagramIss 1 Dwg 1; App 1B Dwg 2B; App 2D Dwg 3D; App 3D Dwg 4D; App 4D Dwg 5D; App 5AC Dwg 6AC
CD-66920-012D93.78 KBPBX Systems - No. 756A - Feature Cabling DiagramIss 2D Dwg 15D; App 1D Dwg 16D; App 2D Dwg 17D; App 3D Dwg 18D; App 4D Dwg 19D
CD-66920-013D378.01 KBPBX Systems - No. 756A - Feature Cabling DiagramIss 3D Dwg 20D; App 1D Dwg 21D; App 2D Dwg 22D
CD-66921-012D3.92 MBPBX Systems - No. 756A - Station Dial Transfer Trunk Circuit with Add-On ConferenceIss 2D Dwg 9D; App 1B Dwg 10B; App 2D Dwg 11D; App 3D Dwg 12D
CD-67025-011463.58 KBPBX Systems - Transmission Test Line - Termination CircuitIss 1 Dwg 1; App 1D Dwg 2D; App 2B Dwg 3B
CD-69000-0126D2.89 MBStation Systems - No. 100 Key Equipment - Multiple Line - Line and Auxiliary Signal Circuit for Use with Central Office or PBX with or without Arrangement to Retire Line Signal When Line is Released at Central Office or PBX Arranged for Intercommunicating ServiceIss 26D Dwg 26D
CD-69001-0115D2.43 MBStation Systems - No. 100 Key Equipment - Multiple Line - Tie Line and Auxiliary Signal CircuitIss 15D Dwg 15D; App 1D Dwg 16D
CD-69002-0115D1.80 MBStation Systems - No. 100 Key Equipment - Telephone, Dial, and Tripping CircuitIss 15D Dwg 15D; App 1D Dwg 16D
CD-69021-011936-03-197D153.10 KBStation Systems - No. 15A Key Equipment Arranged for Remote SwitchingIss 7D Dwg 7D
CD-69037-011936-03-207D174.37 KBStation Systems - No. 23A Key Equipment Arranged for Remote SwitchingIss 7D Dwg 7D
CD-69091-0116D1.89 MBStation Systems - Key Telephone System No. 1A - Line and Signaling CircuitIss 16D Dwg 16D
CD-69091-0117D6.33 MBStation Systems - Key Telephone System No. 1A - Line and Signaling CircuitIss 17D Dwg 17D; App 2D Dwg 19D
CD-69096-017D407.21 KBStation Systems - Key Telephone System No. 1A - Key and Telephone Circuit Arranged for Pickup and Holding on One Central Office or PBX Line and Pickup on 3 Private or Intercommunicating Lines with Common Signaling KeyIss 7D Dwg 7D
CD-69104-015D321.26 KBStation Systems - Key Telephone System No. 1A - Key and Telephone Circuit for Combined Turn and Push Button Key Telephone SetsIss 5D Dwg 5D
CD-69105-013A3.68 MBStation Systems - Key Telephone System No. 1A - Private Line Circuit for an Off-Premise Extension Station Arranged to Provide for Central Office ServiceIss 3A Dwg 6A; App D6A Dwg Hdbk; App 1D Dwg 7D
CD-69105-01 Hdbk3A686.34 KBStation Systems - Key Telephone System No. 1A - Private Line Circuit for an Off Premise Extension Station Arranged to Provide for Central Office Service
CD-69110-018D2.50 MBStation Systems - Unattended Station Circuit for Transmitting External Audible Signals Back to a Calling PartyIss 8D Dwg 8D
CD-69128-016D424.79 KBStation Systems - Key Telephone System No. 1A - Key and Telephone Circuit Arranged for Pick Up, Holding, Cut-Off and SignalingIss 6D Dwg 6D
CD-69129-017D385.83 KBStation Systems - Key Telephone System No. 1A - Key and Telephone Circuit Arranged for Pickup, Cut-Off, and SignalingIss 7D Dwg 7D
CD-69131-013D1.88 MBStation Systems - Key Equipment No. 103AIss 3D Dwg 4D
CD-69132-014D330.10 KBStation Systems - Key Telephone System No. 1A - Key and Telephone Circuit with Separately Mounted Keys Arranged for Pickup, Holding, Cut-Off and SignalingIss 4D Dwg 4D
CD-69133-014D234.50 KBStation Systems - Key Telephone System No. 1A - Key and Telephone Circuit with Separately-Mounted Keys Arranged for Pickup, Cutoff, and SignalingIss 4D Dwg 4D
CD-69136-019B664.68 KBStation Systems - Key Telephone System No. 1A - Line and Signaling Circuit with Strip Mounted EquipmentIss 9B Dwg 13B
CD-69140-013D162.93 KBStation Systems - Key Telephone System No. 1A - Automatic Exclusion CircuitIss 3D Dwg 3D
CD-69155-011328.21 KBStation Systems - Key Telephone System No. 1A - Listening-In CircuitsIss 1 Dwg 1
CD-69160-0118D720.29 KBStation Systems - Equipment UnitsIss 18D Dwg 18D; App 1D Dwg 19D; App 2D Dwg 20D
CD-69165-012D248.08 KBStation Systems - Key Telephone System No. 1A - Station Circuits Using Wiring Plan Keys and Subscriber SetsIss 2D Dwg 2D
CD-69186-011472.43 KBStation Systems - Key Telephone System No. 1A - Lamp, Key and Telephone Circuit with Lamps in Telephone Set Arranged for Pickup and Holding on One Central Office or PBX Line and Pickup on 3 Private or Intercommunicating Links with Common Signaling KeyIss 1 Dwg 1
CD-69187-011492.51 KBStation Systems - Key Telephone System No. 1A - Lamp, Key and Telephone Circuit with Lamps in Telephone Set Arranged for Pick Up, Holding, Cut-Off and SignalingIss 1 Dwg 1
CD-69188-011407.64 KBStation Systems - Key Telephone System No. 1A - Lamp, Key and Telephone Circuit with Lamps in Telephone Set Arranged for Pick Up, Cut-Off and SignalingIss 1 Dwg 1
CD-69196-012D384.93 KBStation Systems - Key Telephone System No. 1A - Attendant's Telephone and Key Circuit Using 101A Key Equipment Key UnitIss 2D Dwg 2D
CD-69199-012D827.36 KB[Station Systems - Intercommunicating Facilities to a Maximum of Nine Stations on a Single Subscriber's Premises Arranged so that Each Station on the Line Can Selectively Signal the Other Stations on the Line by One-Digit Dialing Codes]Iss 2D Dwg 2D
CD-69204-012D3.58 MBStation Systems - Key Telephone System No. 2B for 2-Station Intercommunicating Service Arranged for a Loudspeaker and Distant Talking Transmitter at One StationIss 2D Dwg 2D; App 1A Dwg 3A; App 2D Dwg 4D
CD-69206-011510.08 KBStation Systems - Key Telephone Systems No. 1A or 1A1 - Key and Telephone Circuit Arranged for Pick-Up, Holding, Lamps, Exclusion, Cut-Off and SignalingIss 1 Dwg 1
CD-69207-011339.69 KBStation Systems - Key Telephone Systems No. 1A or 1A1 - Key and Telephone Circuit Arranged for Pickup, Holding, Cutoff and SignalingIss 1 Dwg 1
CD-69211-014D2.39 MBStation Systems - Civil Air Defense Warning Systems - Station Signal Indicator and Control Station Dial CircuitIss 4D Dwg 4D; App 2D Dwg 6D
CD-69225-011777.62 KBStation Systems - Station Circuits for Public Emergency ReportingIss 1 Dwg 1; App 1D Dwg 2D
CD-69226-011928.21 KBStation Systems - F-50682 Telephone Set - Private Line Station Circuit - 2-Wire or 4-Wire Arranged for Loop or Simplex RingingIss 1 Dwg 1; App 1D Dwg 2D
CD-69255-012D5.67 MBStation Systems - Speakerphone System No. 1A - Telephone and Speakerphone CircuitIss 2D Dwg 2D
CD-69286-016D2.13 MBStation Systems - Key Telephone System No. 6A - Intercommunicating Line Circuit - Two-Wire Selective SignalingIss 6D Dwg 6; App 1D Dwg 7D
CD-69360-012D193.70 KBStation Systems - Order Turret No. 4 - Attendant Key and Telephone CircuitIss 2D Dwg 2D
CD-69364-0111.26 MBStation Systems - Control Station Circuit for Use with Central Office Group Alerting SystemIss 1 Dwg 1; App 2A Dwg 3A
CD-69410-01133.12 KBStation Systems - 4-Wire Private Line Circuit Arranged for SS1 or 600/1500-Cycle Selective Signaling, 20-Cycle Signaling, Voice or DC Outgoing Signaling, or Loudspeaker Incoming SignalingApp 1D Dwg 2D
CD-69513-015B104.04 KBStation Systems - Key Telephone System No. 1A2 - CO or PBX Line CircuitApp 2B Dwg 11B; App 3B Dwg 12B; App 4B Dwg 13B
CD-69513-016B1.04 MBStation Systems - Key Telephone System No. 1A2 - CO or PBX Line CircuitIss 6B Dwg 15B
CD-69566-011709.42 KBStation System - 4-Wire Private Line - Terminating and Station CircuitIss 1 Dwg 1
CD-69604-011152.82 KBStation Systems - Key Telephone System No. 1A2 - Off Premises Line CircuitIss 1 Dwg 1
CD-69608-012A1C118.77 KBStation Systems - Key Telephone System No. 1A2 - Dial Intercommunicating and Miscellaneous PanelsIss 2A1C Dwg 4A1C
CD-69611-012D260.11 KBStation Systems - 516A Key Service Unit (433A KTU) Interconnecting Circuit and 105A Interconnecting Unit for Use Between Bell System CO and Customer-Provided Manual Switchboard or Automatic PBXIss 2D Dwg 2D
CD-69617-011345.16 KBStation Systems - Key Telephone System No. 1A2 - CO or PBX Line Circuit (Integrated Circuit Type)Iss 1 Dwg 1
CD-69624-012D232.51 KBStation Systems - Key and Telephone Circuit for Rotary and "TOUCH-TONE" Dial 10-Button Telephone Sets - 830- and 2830-Type Telephone SetsIss 2D Dwg 2D
CD-69625-011223.22 KBStation Systems - Key and Telephone Circuit for Rotary and "TOUCH-TONE" Dial 20-Button Telephone Set - 831 A1M and 2831 A1M Telephone SetsIss 1 Dwg 1
CD-69626-011101.94 KBStation Systems - Interphone Radio Transfer Arrangement for Use with FAA Small Key Systems or 112 Key EquipmentIss 1 Dwg 1
CD-69635-01198.56 KBStation Systems - Key Telephone System No. 1A2 - 584D Panel ConnectionsIss 1 Dwg 1
CD-69637-011846.99 KBStation Systems - Key Telephone Systems No. 1A, 1A1, 1A2 and 6A - 630DA, 631DA, 2630DA, 2631DA Telephone Set Circuit - 18- and 30- Button Capacity for Use with 2-Wire Lines Arranged for Dial Pulse or "TOUCH-TONE" Calling and Handset or Speakerphone OperationIss 1 Dwg 1
CD-69639-011779.68 KBStation Systems - Key Telephone Systems No. 1A, 1A1, 1A2 and 6A - 636CA, 637DA, 2636CA, 2637DA Telephone Set Circuit - 18- and 30- Button Capacity for Use with 2-Wire Lines Arranged for Handset or Headset Operation and Dial Pulse or "TOUCH-TONE" CallingIss 1 Dwg 1
CD-69641-011803.65 KBStation Systems - Key Telephone System No. 1A2, 1A1, or 6A - 682AA, 2682AA, 683AA, and 2683AA Telephone Set Circuits - 18- and 30-Button CapacityIss 1 Dwg 1
CD-69651-011319.50 KBStation Systems - Key Telephone System No. 1A2 - CO or PBX Line Circuit - 400G KTUIss 1 Dwg 1
CD-69900-011469.94 KBStation Systems - 50A Conference Set (73A Control Unit) CircuitIss 1 Dwg 1; App 1D Dwg 2D; App 2D Dwg 3D
CD-69900-022A520.85 KBStation Systems - 50A1 Conference Set (73B Control Unit) CircuitApp 1D Dwg 3D
CD-69906-011647.46 KBStation Systems - Key Telephone System No. 1A2 - "TOUCH-TONE" Adapter Circuit - Type D4Iss 1 Dwg 1; App 1D Dwg 2D; App 2B Dwg 3B; App 3D Dwg 4D
CD-6C332-021356.55 KBCommon Systems - 3B Battery Charger CircuitIss 1 Dwg 1; App 1A Dwg 2A
CD-70515-0112.18 MBTelegraph Systems - Telegraph Test Board No. 9 - Telegraph Service Boards Nos. 2 and 9B - Toll Test Boards Nos. 5, 16 and 18B - Morse Board No. 4 - Interconnection Circuit for Carrier Telegraph Between VF Telegraph Line Bd. And Voice Frequency FacilityIss 1 Dwg 1; App 1AR Dwg 2AR; App 2AR Dwg 3AR; App 3AR Dwg 4AR; App 4D Dwg 5D
CD-73094-012D2.31 MBData Systems - Station - Data Test Set No. 911NAIss 2D Dwg 2D; App 1A Dwg 3A; App 2B Dwg 4B
CD-73112-011278.25 KBData Systems - Station - EIA Test Adapter No. 911P for Use with RS-232A, B, or C Interface ConnectorsIss 1 Dwg 1
CD-7C007-013B970.57 KBCommon Systems - Metallic Facility Terminal - Power Distribution Circuit for Use with Metallic Facility Terminal BaysIss 3B Dwg 6B; App 1A Dwg 7A
CD-7C011-012A1.48 MBCommon Systems - Signaling - Tone Supply and Transfer - Fuse and Alarm - Power Converter - Carrier Group Alarm Circuit for Use with FU( ) & Auxiliary Signaling UnitsIss 2A Dwg 4A
CD-7C012-012A890.82 KBCommon Systems - Signaling - FU( ) Plus Auxiliary Signaling Circuit for Use with Type F SignalingIss 2A Dwg 4A; App 1B Dwg 5B
CD-7C018-014B1.73 MBCommon Systems - Metallic Facility Terminal - Bay WiringIss 4B Dwg 9B; App 1D Dwg 10D
CD-80223-011931-11-131220.50 KBPower Systems - Charge and Discharge Circuit - 750-A P.B.X. Power Plants Arranged for Charging Over Cable Pairs or by Copper Oxide RectifierIss 1 Dwg 1; App 1D Dwg 2D; App 2D Dwg 3D; App 3D Dwg 4D; App 4D Dwg 5D; App 5D Dwg 6D; App 6D Dwg 7D; App 7D Dwg 8D; App 8D Dwg 9D
CD-80477-011932-06-214D467.24 KBPower Systems - 750-A PBX Power Plant - Charge and Discharge Circuit with Relay for Charge ControlIss 4D Dwg 4D
CD-80477-0111D113.84 KBPower Systems - 750A PBX Power Plant - Charge and Discharge Circuit with Relay for Charge ControlIss 11D Dwg 11D
CD-80588-0110D192.32 KBPower Systems - 755A P.B.X. Plant - Charge and Discharge Circuit with Relay for Charge ControlIss 10D Dwg 10D; App 1D Dwg 11D; App 2D Dwg 12AR
CD-80606-0214.48 MBPower Systems - Regulated Tube Rectifier Ckt. - Magnitude Control - 115/230 Volts, 60 Cycles A-C - 50 Volts 8 Amps. Cont., 10 Amps. Intr. D-C - Panel Mounted - J86207JIss 1 Dwg 1; App 1D Dwg 2D; App 2D Dwg 3D; App 3D Dwg 4D; App 4B Dwg 5B; App 5D Dwg 6D; App 6D Dwg 7D; App 7D Dwg 8D; App 8D Dwg 9D; App 9D Dwg 10D
CD-80620-012AR2.43 MBPower Systems - Rectifier Circuit - Regulated - Phase Shift Control - 190-250V, 50-60 Cycles AC - Electron Tube Type 132-152V, 8 Amp DC - Semiconductor Type 132-152V, 9 Amp DC - J86207CIss 2AR Dwg 16AR; App 1B Dwg 17B
CD-80720-025D2.00 MBPower Systems - 100 Type Plants - Discharge Circuit - 10-240 Ampere 44-50 Volt - 110A PlantsIss 5D Dwg 22D; App 1AR Dwg 23AR; App 2D Dwg 24D; App 3D Dwg 25D; App 4D Dwg 26D; App 5D Dwg 27D
CD-80722-024D3.57 MBPower Systems - 100 & 700 Type Plants - Charge Circuit Using Regulated Rectifiers - 10-400 Ampere 44-50 Volt - 110A & 704C PlantsIss 4D Dwg 16D; App 1D Dwg 17D; App 2D Dwg 18D; App 3D Dwg 19D
CD-80728-0112.22 MBPower Systems - 300 Type Plants - Battery Distributing Circuit - Grouping of Frames and Racks - Decentralized Power Filters - Step by Step SystemIss 1 Dwg 1; App 1D Dwg 2D; App 2D Dwg 3D; App 3D Dwg 4D; App 4D Dwg 5D; App 5D Dwg 6D; App 6D Dwg 7D; App 7D Dwg 8D; App 8D Dwg 9D; App 9D Dwg 10D
CD-80929-018B1.11 MBPower Systems - 500 Type Plants - Power Supply Circuit - 50VA, 0.25, 0.5, 0.75, and 1.5 kVA - 20 or 22 Volt A-C Supply - 506A PlantIss 8B Dwg 11B; App 1AC Dwg I12AC; App 2AC Dwg 13AC
CD-80942-013D2.26 MBPower Systems - 400 Type Plants - Discharge Circuit - 1-25 Ampere Pos. and Neg. 130V. - Automatic Power Plant - 410A PlantIss 3D Dwg 11D; App 1B Dwg 12B; App 2D Dwg 13D; App 3D Dwg 14D; App 4D Dwg 15D; App 5D Dwg 16D; App 6D Dwg 17D
CD-80943-013D2.45 MBPower Systems - Charge Circuit - 130 Volts 1-25 Ampere - 410A PlantsIss 3D Dwg 13D; App 1D Dwg 14D; App 2B Dwg 15B; App 3B Dwg 16B; App 4 Dwg 17; App 5D Dwg 18D; App 6D Dwg 19D
CD-81126-012D1.56 MBPower Systems - Control Circuit - Frame and Aisle Lighting - Incandescent Type and Appliance OutletsIss 2D Dwg 2D; App 1D Dwg 3D; App 2D Dwg 4D; App 3D Dwg 5D; App 4B Dwg 6B
CD-81132-013D566.83 KBPower Systems - 800 Type Plants - Ringing Circuit - Superimposing and Tripping Batteries - 806E & 806F Ringing Power PlantsIss 3D Dwg 4D
CD-81134-014B2.23 MBPower Systems - 100 Type Plants - Charge and Discharge Circuit - 10, 20, & 30 Amperes - 48 Volts - 105D PlantsIss 4B Dwg 7B; App 1D Dwg 8D; App 2D Dwg 9D; App 3D Dwg 10D
CD-81138-012A1.69 MBPower Systems - Rectifier Circuit - Electron Tube Type - Automatic Regulation - 48 Volts, 8 Amperes DC - J86251AIss 2A Dwg 3A; App 1A Dwg 4A; App 2B Dwg 5B; App 3B Dwg 6B; App 4D Dwg 7D
CD-81171-011124.41 KBPower Systems - 800 Type Plants - Signaling Circuit - Howler Interrupter - KS-15547 Machine - J86726EIss 1 Dwg 1; App 1D Dwg 2D; App 2B Dwg 3B
CD-81180-012A2.75 MBPower Systems - Rectifier Circuit - Metallic Type - Automatic Regulation - 48 Volts - 30 Amperes - J86263AIss 2A Dwg 2A; App 10A Dwg 12A; App 11D Dwg 13D; App 1B Dwg 3B; App 2B Dwg 4B; App 3B Dwg 5B; App 4D Dwg 6D; App 5D Dwg 7D; App 6B Dwg 8B; App 7B Dwg 9B; App 8D Dwg 10D; App 9B Dwg 11B
CD-81225-012B4.57 MBPower Systems - 800 Type Plants - Ringing Circuit - AC-DC or Superimposed Ringings - SXS System No. 355A - 806F Ringing Power PlantIss 2B Dwg 9B; App 1D Dwg 10D
CD-81288-01168.83 KBPower Systems - Ringing Circuit - Interrupter Equipment - 756A PBX - J86464CIss 1 Dwg 1; App 1D Dwg 2D
CD-81318-017D116.95 KBPower Systems - Rectifier Circuit - Semiconductor Type - Automatic Regulation - 48 Volts 7.5 Amperes - J86281AIss 7D Dwg 13D
CD-81325-012B120.30 KBPower Systems - Ringing Circuit - Ringing & Tone Supply - 756A PBX - J86464DIss 2B Dwg 3B; App 1D Dwg 4D; App 2D Dwg 5D
CD-81326-016D79.60 KBPower Systems - Power Supply Circuit for 756A PBX - J86464Iss 6D Dwg 11D
CD-81326-022D885.34 KBPower Systems - Power Supply Circuit for 756A PBX with Battery Reserve - J86464Iss 2D Dwg 5D; App 1B Dwg 6B; App 2D Dwg 7D; App 3D Dwg 8D
CD-81328-015D436.59 KBPower Systems - Signaling Circuit - Transistor Low Tone Supply - 756A PBX - J86464GIss 5D Dwg 5D; App 1D Dwg 6D
CD-81329-016B225.28 KBPower Systems - Ringing Circuit - Transistor 20∼ Supply - 756A PBX - J86464HIss 6B Dwg 6B
CD-81329-017D590.89 KBPower Systems - Ringing Circuit - Transistor 20∼ Supply - 756A PBX & 800A PBX - J86464HIss 7D Dwg 7D; App 1D Dwg 8D
CD-81330-013D154.75 KBPower Systems - Supply Circuit - Transistor 60∼ Supply - 756A PBX - J86464JIss 3D Dwg 3D
CD-81331-015B289.65 KBPower Systems - Ringing Circuit - Transistor Transfer and Alarm for 20 and 60 Cycle Supplies - 756A PBX - J86464FIss 5B Dwg 5B
CD-81337-012D1.24 MBPower Systems - Ringing Circuit - AC-DC Ringing - 701B, 711B & 740E PBX - 806G Ringing Power Plant - J86472Iss 2D Dwg 8D; App 1D Dwg 9D; App 2D Dwg 10D
CD-81396-013A1.07 MBPower Systems - Rectifier Circuit - Semi Conductor Type - Automatic Regulation - 48 & 24 Volt, 30 Amperes - J86231AIss 3A Dwg 4A; App 1B Dwg 5B; App 2B Dwg 6B
CD-81504-014B899.10 KBPower Systems - Power Supply Circuit - DC to DC Transistor Converter - ±120 Volt or ±130 Volt Output - -48 Volt Input - 610B PlantIss 4B Dwg 15B; App 1B Dwg 16B; App 2B Dwg 17B; App 3AC Dwg 18AC
CD-81540-016B1.18 MBPower Systems - Regulated Rectifier - Semiconductor Type - 48 Volts 11 Amperes DC - 115/230 Volts 60 Cycles AC - J87211AIss 6B Dwg 13B; App 1AR Dwg 14AR; App 2AC Dwg 15AC; App 3D Dwg 16D; App 4D Dwg 17D; App 5B Dwg 18B
CD-81541-013AC976.00 KBPower Systems - Regulator Control Circuit - Semiconductor Type - J87214AIss 3AC Dwg 5AC; App 1D Dwg 6D; App 2B Dwg 7B
CD-81577-013D141.68 KBPower Systems - Power Supply Circuit - AC, DC & Ringing Supply for Switching System 400 - J86812A & BIss 3D Dwg 3D; App 1D Dwg 4D; App 2B Dwg 5B
CD-81577-015B1.07 MBPower Systems - Power Supply Circuit - AC, DC & Ringing Supply - J86812A & BIss 5B Dwg 7B; App 1D Dwg 8D; App 2B Dwg 9B; App 3D Dwg 10D; App 4D Dwg 11D; App 5D Dwg 12D; App 6D Dwg 13D
CD-81581-013D417.08 KBPower Systems - Slide No. 1 Power Supply for 757A PBX - J86808BIss 3D Dwg 9D; App 1B Dwg 10B
CD-81581-015B1.37 MBPower Systems - Slide No. 1 Power Supply for 757A PBX - J86808BIss 5B Dwg 17B; App 1D Dwg 18D; App 2D Dwg 19D; App 3B Dwg 20B; App 4D Dwg 21D; App 5D Dwg 22D
CD-81591-013AR1.61 MBPower Systems - 100 Type Plants - Charge and Discharge Circuit - Positive or Negative 48 Volts, 30 Ampere - 105E Power PlantIss 3AR Dwg 8AR; App 1AR Dwg 9AR; App 2B Dwg 10B
CD-81600-014D77.95 KBPower Systems - Power Supply Circuit - AC, DC & Ringing Supply for 756A Batteryless PBX - J86464LIss 4D Dwg 5D
CD-81600-015B608.87 KBPower Systems - Power Supply Circuit - AC, DC & Ringing Supply for 756A Batteryless PBX - J86464LIss 5B Dwg 6B; App 1B Dwg 7B; App 2D Dwg 8D; App 3D Dwg 9D
CD-81719-012AR683.93 KBPower Systems - Signaling Circuit - Dial Tone Generator for PBX - "TOUCH-TONE" CallingIss 2AR Dwg 3AR
CD-81719-014A717.95 KBPower Systems - Signaling Circuit - 404 (A, B, C, & D) & 405 (A, B, C & D) Dial Tone Generators for PBX - "TOUCH-TONE" CallingIss 4A Dwg 7A; App 1B Dwg 8B; App 2D Dwg 9D; App 3D Dwg 10D; App 4D Dwg 11D
CD-81837-013D1.91 MBPower Systems - Remote Test Voltage Supply Circuit - J87300Iss 3D Dwg 6D; App 1B Dwg 7B; App 2D Dwg 8D; App 3D Dwg 9D; App 4B Dwg 10B
CD-81920-011535.55 KBPower Systems - Power Supply Circuit - -96 Volt DC Applique for 756A PBX - J86464PIss 1 Dwg 1; App 1B Dwg 2B; App 2D Dwg 3D
CD-82447-011170.42 KBPower Systems - Charge and Discharge Circuit - 48 Volts, 600 Amps - 100 Type Plants - 151C Power PlantIss 1 Dwg 1; App 1B Dwg 2B
CD-82588-011508.60 KBPower Systems - "LINEAGE" 2000 Controller for 24 Volt or 48 Volt Power Plant - J85501AIss 1 Dwg 1; App 2A Dwg 3A; App 3AC Dwg 4AC; App 4A Dwg 5A; App 5B Dwg 6B; App 6M Dwg 7M; App 7B Dwg 8B; App 8M Dwg 9M; App 9A Dwg 10A
CD-82588-02125.01 KBPower Systems - "LINEAGE" 2000 MCS/CCS Controller for 24 Volt or 48 Volt Power Plant - J85501A-2 / J85501A-3App 1B Dwg 2B
CD-82603-012B535.23 KBPower Systems - "LINEAGE" 2000 Charge and Discharge Circuit - 24 or 48 Volts 6400 Amperes Maximum - J85500Iss 2B Dwg 4B; App 1A Dwg 5A; App 2B Dwg 6B; App 3M Dwg 7M
CD-82604-011660.20 KBPower Systems - "LINEAGE" 2000 Rectifier Circuit - Input: 208 or 240 Volts 60 Hz - Output: 24 Volts or 48 Volts 25 or 50 Amperes - J85502A&BIss 1 Dwg 1; App 1B Dwg 2B; App 2A Dwg 3A; App 3M Dwg 4M; App 4M Dwg 5M; App 6M Dwg 7M; App 7M Dwg 8M
CD-82605-011797.59 KBPower Systems - "LINEAGE" 2000 Rectifier Circuit - 208/240/480 Volt, 60 Hz, 3 Phase Input - 24 or 48 Volt, 100 or 200 Ampere Output - J85503A&BIss 1 Dwg 1; App 1A Dwg 2A; App 2B Dwg 3B; App 3A Dwg 4A; App 4M Dwg 5M; App 5M Dwg 6M; App 6M Dwg 7M; App 7A Dwg 8A
CD-82619-012B440.67 KBPower Systems - DC Power - Distributing Frame - J86334DIss 2B Dwg 2B
CD-82646-011280.17 KB"LINEAGE" XCS Controller - J85501BIss 1 Dwg 1; App 1B Dwg 2B
CD-82649-011311.38 KBPower Systems - "LINEAGE" 2000 Charge and Discharge Ckt - 24 or 48 Volts 600 Amperes Maximum - J85500CIss 1 Dwg 1; App 1B Dwg 2B; App 2B Dwg 3B; App 3B Dwg 4B
CD-82659-012A375.15 KBPower Systems - "LINEAGE" 2000 Rectifier Circuit - Input: 208 or 240 Volts, 60 Hz - Output: 24 Volts or 48 Volts 125 Amperes - J85502CIss 2A Dwg 2A
CD-83102-012AC598.09 KBPower Systems - Rectifier Circuit - 208/240 or 480 Volt, 60 Hz Input - 48 Volt, 400 Ampere Output - J85503CIss 2AC Dwg 2AC; App 1B Dwg 3B; App 2A Dwg 4A; App 3B Dwg 5B; App 4M Dwg 6M; App 5A Dwg 7A
CD-83104-011556.00 KBPower Systems - "LINEAGE" 2000 Charge and Discharge Circuit - 24 or 48 Volts, 400 Amperes MaximumIss 1 Dwg 1; App 1B Dwg 2B; App 2B Dwg 3B; App 3A Dwg 4A; App 4B Dwg 5B; App 5B Dwg 6B
CD-8G000-01127.86 KB5ESS Switching Equipment - Access Interface Unit (AIU)Iss 1 Dwg 1
CD-90122-018D1.21 MBCommon Systems - Test Terminal Circuit for Battery and Ground for Toll, Manual, Panel, Step-by-Step, Crossbar or Telegraph SystemsIss 8D Dwg 9D; App 1D Dwg 10D; App 2D Dwg 11D; App 3D Dwg 12D; App 4D Dwg 13D; App 5D Dwg 14D; App 6D Dwg 15D
CD-90469-0213D12.64 MBCommon Systems - Trunk Test Set Circuit for Use in Step-by-Step Offices in Testing Subscriber Recording Completing Trunks, Outgoing Trunks from Selector Equipment, Coin Trunk Circuits, Line and Trunk Finders, Selectors, Connectors, and Outgoing Repeaters and Rotary Out Trunk Switches and in Toll Offices for Testing 3-Wire Subscriber Recording Completing Trunks from Step-by-Step OfficesIss 13D Dwg 15D; App 1D Dwg 16D; App 2D Dwg 17D; App 3D Dwg 18D; App 4B Dwg 19B; App 5D Dwg 20D
CD-90515-0112.41 MBCommon Systems - Telephone Repeater Application Schematic - 22 Type Telephone Repeater for Use in P.B.X. or Long Subscriber Lines or Trunk CircuitsIss 1 Dwg 1; App 1D Dwg 2D; App 2AR Dwg 3AR; App 3D Dwg 4D; App 4D Dwg 5D; App 5D Dwg 6D; App 6D Dwg 7D
CD-90517-014D968.38 KBCommon Systems - Line and Balancing - Compromise and Balancing Networks for Use with Exchange Area Circuits or Attendants Telephone SetsIss 4D Dwg 15D; App 1D Dwg 16D
CD-95000-016D1.86 MBCommon Systems - Transmission Measuring - Milliwatt Distributing Ckt with 2A Sending PanelIss 6D Dwg 22D; App 1D Dwg 23D; App 2D Dwg 24D; App 3B Dwg 25B; App 4D Dwg 26D
CD-95000-0211.26 MBCommon Systems - Transmission Measuring - Milliwatt Distributing Ckt Using 2A Sending PanelIss 1 Dwg 1; App 1D Dwg 2D
CD-95015-013D1.15 MBCommon Systems - Line and Balancing - Repeating Coil and Compromise Network Ckt. For Use with Trunk and Long Line CircuitsIss 3D Dwg 8D; App 1D Dwg 9D; App 2D Dwg 10D
CD-95032-016D1.23 MBCommon Systems - Composite Signaling Circuit Type B with Type D CX Set and Reating Coils Arranged for Phantom Group or Single Physical 2 Way Signaling 2 Way Dialing Over Short Haul Cable and Open Wire Non-Repeatered CircuitsIss 6D Dwg 13D
CD-95072-0114D2.57 MBCommon Systems - Distribution Fuse, Common Aisle and Miscellaneous Individual Alarm Circuit with 24V Battery SupplyIss 14D Dwg 20D
CD-95102-022B1007.67 KBCommon Systems - Transmission Measuring - 1W Noise Amplifier Rectifier Ckt. For Measuring Noise on Transmission Circuits on a Message Weighting BasisIss 2B Dwg 5B; App 1B Dwg 6B; App 2B Dwg 7B; App 3B Dwg 8B; App 4B Dwg 9B; App 5B Dwg 10B
CD-95113-013B1.54 MBCommon Systems - "V3" Telephone Repeater - Battery Supply and Connecting Ckts for One or More VF AmplifiersIss 3B Dwg 8B
CD-95118-0115B5.24 MBCommon Systems - "N", "O" & "ON" Carrier Telephone - N1, O1, ON1 & ON2 Channel CktIss 15B Dwg 27B; App 1B Dwg 28B; App 2B Dwg 29B
CD-95121-018D3.62 MBCommon Systems - "N1" Carrier Telephone - Application Schematic for TerminalIss 8D Dwg 19D; App 1B Dwg 20B; App 2B Dwg 21B; App 3B Dwg 22B; App 4B Dwg 23B
CD-95124-018B445.41 KBCommon Systems - "N1" & "ON" Carrier Telephone - Application Schematic for "N1", "ON1" & "ON2" RepeaterIss 8B Dwg 23B; App 1B Dwg 24B
CD-95129-014D2.54 MBCommon Systems - "N1" Carrier Telephone - Low Group Transmitting Ckt.Iss 4D Dwg 7D; App 1B Dwg 8B; App 2D Dwg 9D; App 3B Dwg 10B
CD-95130-0112.44 MBCommon Systems - "N1" Carrier Telephone - High Group Receiving Ckt.Iss 1 Dwg 1; App 1A Dwg 2A; App 2A Dwg 3A; App 3A Dwg 4A; App 4B Dwg 5B; App 5AR Dwg 6AR; App 6D Dwg 7D; App 7D Dwg 8D
CD-95142-018D1.68 MBCommon Systems - Type N Carrier Telephone - Signaling - Order Wire and Alarms - Line Bridging, Cutoff Relay and Power Supply ArrangementsIss 8D Dwg 19D
CD-95143-015D2.56 MBCommon Systems - Type N Carrier Telephone - VF Alarm and Order Wire Signaling CktIss 5D Dwg 9D; App 1D Dwg 10D; App 2D Dwg 11D; App 3D Dwg 12D
CD-95144-013B4.27 MBCommon Systems - "V3" Telephone Repeater - Line and Balancing - Application Schematic for Use with Voice Frequency and Carrier Ckts.Iss 3B Dwg 8B
CD-95150-0112D3.21 MBCommon Systems - "O" & "ON" Carrier Telephone - Application Schematic - "O1", "ON1" & "ON2" Carrier Terminal - Also for Use with ON/K Carrier TerminalIss 12D Dwg 19D; App 1D Dwg 20D; App 2D Dwg 21D
CD-95151-0110B513.05 KBCommon Systems - "O" & "ON" Carrier Telephone - O1, ON1, and ON2 Twin-Channel Carrier Ckt.Iss 10B Dwg 16B
CD-95152-019B3.12 MBCommon Systems - "O" & "ON" Carrier Telephone - OB1, OC1, OD1, Group Receiving or Repeater Amplifier Ckt. And ON1 & ON2 Group Receiving Ckt.Iss 9B Dwg 12B
CD-95153-019D1.99 MBCommon Systems - "O" & "ON" Carrier Telephone - OB1, OC1, OD1, ON1 & ON2 Group Transmitting Ckt.Iss 9D Dwg 10D; App 1D Dwg 11D; App 2B Dwg 12B
CD-95154-018A1.38 MBCommon Systems - "O" and "ON" Carrier Telephone - "O1" Terminal Group Oscillator & "ON1" and "ON2" Group Oscillator CktsIss 8A Dwg 13A; App 1D Dwg 14D
CD-95158-017A1.01 MBCommon Systems - "O" and "ON" Carrier Telephone - O1 Repeater Oscillator & Misc. Oscillator & ON1 Misc. Oscillator Ckts.Iss 7A Dwg 11A; App 1D Dwg 12D
CD-95163-013A856.57 KBCommon Systems - "N1" & "O1" Carrier Telephone - Channel Test Stand Ckt. And Connecting Cord - Testing and MaintenanceIss 3A Dwg 3A; App 1B Dwg 4B
CD-95178-012D3.76 MBCommon Systems - "N1" Carrier Telephone - High-Low Repeater Ckt.Iss 2D Dwg 2D; App 1D Dwg 3D; App 2B Dwg 4B
CD-95178-013B3.67 MBCommon Systems - "N1" Carrier Telephone - High-Low Repeater CktIss 3B Dwg 5B
CD-95179-012D3.66 MBCommon Systems - "N1" Carrier Telephone - Low-High Repeater Ckt.Iss 2D Dwg 2D
CD-95198-014B571.47 KBCommon Systems - "ON" Carrier Telephone - ON1 or ON2 Combining Network & Oscillator CktIss 4B Dwg 4B
CD-95224-013B1.11 MBCommon Systems - ON1, ON2 & ON/K Carrier Telephone - Slope Network, Span Pads and Artificial Line Ckts.Iss 3B Dwg 3B
CD-95259-011195.61 KBCommon Systems - KS-16617 Amplifier Circuit - Special Purpose Amplifier for Use in MDF Loudspeaker Telephone SystemIss 1 Dwg 1; App 1D Dwg 2D
CD-95277-016B1.86 MBCommon Systems - Transmission Measuring - Milliwatt Distributing Circuit Using 71 Type Milliwatt Reference GeneratorIss 6B Dwg 11B; App 1B Dwg 12B; App 2B Dwg 13B
CD-95277-023B2.02 MBCommon Systems - Transmission Measuring - Milliwatt Distributing Circuit Using 71F Milliwatt Reference GeneratorIss 3B Dwg 6B
CD-95281-0111.55 MBCommon Systems - KS-16754 Amplifier CircuitIss 1 Dwg 1; App 1D Dwg 2D; App 2D Dwg 3D; App 3D Dwg 4D; App 4B Dwg 5B; App 5B Dwg 6B; App 6D Dwg 7D
CD-95294-012A5.79 MBCommon Systems - "N2" Carrier Telephone Compandor CktIss 2A Dwg 2A; App 10B Dwg 12B; App 11AR Dwg 13AR; App 12D Dwg 14D; App 13D Dwg 15D; App 14B Dwg 16B; App 15B Dwg 17B; App 1A Dwg 3A; App 2B Dwg 4B; App 3AC Dwg 5AC; App 4B Dwg 6B; App 5B Dwg 7B; App 6B Dwg 8B; App 7AR Dwg 9AR; App 8B Dwg 10B; App 9B Dwg 11B
CD-95460-011261.32 KBCommon Systems - Repeater Circuit Arranged for Operating on 48 Volt Filament Supply for Use at Terminating Office with Announcement Desk No. 1 or 1BIss 1 Dwg 1; App 1D Dwg 2D; App 2D Dwg 3D; App 3D Dwg 4D; App 4D Dwg 5D; App 5D Dwg 6D
CD-95703-012D255.67 KBCommon Systems - MF Keyset Circuit - Local Test Cabinet No. 3Iss 2D Dwg 3D; App 1D Dwg 4D; App 2B Dwg 5B; App 3D Dwg 6D; App 4D Dwg 7D
CD-95739-0110D1.74 MBCommon Systems - Line Concentrator Identifier Circuit Applied to Telephone Secretarial Service Originating EndIss 10D Dwg 20D
CD-95748-019D1.13 MBCommon Systems - Line Concentrator-Identifier Circuit Applied to Telephone Secretarial Service Terminating EndIss 9D Dwg 17D; App 1B Dwg 18B
CD-95867-014D2.17 MBCommon Systems - Multifrequency Signal Generator CircuitIss 4D Dwg 5D; App 1D Dwg 6D; App 2AR Dwg 7AR
CD-95867-015D272.18 KBCommon Systems - Multifrequency Signal Generator CircuitIss 5D Dwg 11D; App 1D Dwg 12D; App 2B Dwg 13B
CD-95890-014D953.72 KBCommon Systems - Outpulser Connector Circuit - Automatic Number Identification Type B and Type C - Crossbar No. 1, Panel or Step-by-Step No. 1, 350A, 355A or 35E97 OfficeIss 4D Dwg 9D; App 1D Dwg 10D; App 2B Dwg 11B; App 3D Dwg 12D; App 4B Dwg 13B
CD-95956-012B191.93 KBCommon Systems - Dual Channel Recevier Circuit - 700 and 1100 Cycles per SecondIss 2B Dwg 5B; App 1D Dwg 6D; App 2D Dwg 7D; App 3D Dwg 8D
CD-95973-012D165.51 KBCommon Systems - Subscriber Loop - Bridge Lifting CircuitIss 2D Dwg 2D
CD-96002-012D844.30 KBCommon Systems - Local Test Cabinet No. 2 - Test Set Circuit - Test Battery Supply Jack Circuit for Testing Subscriber Lines and TrunksIss 2D Dwg 2D
CD-96147-012D313.39 KBCommon Systems - Transmission Measuring - Sending Pad Circuit for VF Channel Tests at "N" or "O" Carrier Telephone TerminalIss 2D Dwg 2D
CD-96181-0110D1.50 MBCommon Systems - Local Test Cabinet No. 3 - Telephone and Test Circuit for Testing Subscriber LinesIss 10D Dwg 24D; App 1AC Dwg 25AC; App 2B Dwg 26B; App 3B Dwg 27B; App 4D Dwg 28D
CD-96190-012D486.91 KBCommon Systems - "N1" Carrier Telephone - "E" Lead Grounding Ckt. For Providing "E" Lead Ground During Carrier FailureIss 2D Dwg 2D; App 1AR Dwg 3AR
CD-96221-018D380.71 KBCommon Systems - Two-Way Trunk Circuit to Subscriber Line Circuit - Incoming Ringdown Outgoing Automatic or 2-Way Ringdown to Other Desks - Local Test Cabinet No. 3 - Key Cabinet No. 20 or 21 - Local Test Desk No. 14 or Local Test Desk No. 16 or Line Status Verifier CTG Test Board - Master Test Frame - ACD Test Frame - Chief Switchman's Desk - Sender Make Busy Frame - Test Supervisor's Private Desk - Repair Service Desk No. 2 - Cable Test Desk No. 3 - ESS No. 1 Master Control Center - Local Test Desk No. 15BIss 8D Dwg 22D
CD-96403-0111A3.03 MBTraffic Management Systems - Dial Tone Speed Register Circuit for Use in Dial OfficesIss 11A Dwg 30A
CD-96474-016AC815.76 KBCommon Systems - Test Trunk Ringing CircuitIss 6AC Dwg 18AC; App 1B Dwg 19B; App 2B Dwg 20B
CD-96555-014D535.43 KBCommon Systems - Dial Long Line Circuit - 10 or 20 PPS Repeating for Subscriber Lines, PBX Station Lines or PBX Manual Selected Trunks - Dial Central Office or PBXIss 4D Dwg 13D; App 1D Dwg 14D; App 2A Dwg 15A; App 3D Dwg 16D; App 4D Dwg 17D
CD-97047-016D1.43 MBCommon Systems - V4 Telephone Repeater - Battery Supply and Connecting Circuits for Two or More VF AmplifiersIss 6D Dwg 17D
CD-97102-013D185.81 KBCommon Systems - 15 Amp Decentralized Filter Circuit for Talking or Filament Battery Supply Arranged for Mounting from the SuperstructureIss 3D Dwg 14D; App 1D Dwg 15D; App 2D Dwg 16D
CD-97753-014D1.64 MBCommon Systems - 13A Announcement System Circuit for Recording and Reproducing Dial Facilities Management AnnouncementsIss 4D Dwg 8D
CD-97798-013B787.38 KBCommon Systems - 14A Announcement System CircuitIss 3B Dwg 8B
CD-98100-017B3.71 MBCommon Systems - Transmission Test Line or Test Trunk Circuit - Crossbar, Manual, Panel, Step-by-Step, PBX, or Toll OfficesIss 7B Dwg 19B; App 1A Dwg 20A; App 2D Dwg 21D; App 3A Dwg 22A
CD-98148-014B593.97 KBCommon Systems - "TOUCH-TONE" Calling Receiving Circuit Type A3Iss 4B Dwg 15B; App 1D Dwg 16D; App 2B Dwg 17B; App 3D Dwg 18D
CD-99303-015A711.39 KBCommon Systems - 400A Tone Generator CircuitIss 5A Dwg 12A; App 1B Dwg 13B; App 2A Dwg 14A; App 3B Dwg 15B; App 4D Dwg 16D; App 5D Dwg 17D; App 6D Dwg 18D; App 7D Dwg 19D
CD-99328-014D308.99 KBCommon Systems - Signal Generator for Supplying Frequencies to Keysets Arranged to Pulse 2/6 and 4x4 FrequenciesIss 4D Dwg 8D; App 1D Dwg 9D
CD-99331-0111.30 MBCommon Systems - 60A Control Unit CircuitIss 1 Dwg 1; App 1A Dwg 2A; App 2B Dwg 3B; App 3D Dwg 4D; App 4D Dwg 5D; App 5D Dwg 6D; App 6AC Dwg 7AC; App 7D Dwg 8D; App 8D Dwg 9D
CD-99331-014B409.43 KBCommon Systems - J99329A Control Unit (60A) CircuitIss 4B Dwg 16B
BT-2070171925-08-041615.20 KBPanel Machine Switching System - Coin Circuit for Incoming Trunks - To be Used in Offices Where Multiple Banks Require Break Down ProtectionIss 1 Dwg 18
BT-2071971942-04-302821.84 KBPanel System - Starting Circuit for Use with Panel Line Finder - Battery Grounded at EndIss 2 Dwg 26
CD-20738931D1.25 MBPanel Systems - Final Circuit with Marginal Relay Test CircuitIss 31D Dwg 31D
CD-2075501937-10-0813D1.78 MBPanel System - Incoming From Manual Key Indicator System With 4 Party Semi-Selective RingingIss 13D Dwg 13D; App 14D Dwg 14D; App 15AR Dwg 15AR
BT-2078671930-04-023480.97 KBMiscellaneous Tone and Interrupter Circuits - Panel SystemIss 3 Dwg 23
BT-2079591939-05-0111.19 MBPanel System - Final Circuit with Marginal Relay Test Circuit - Arranged for Routine Testing of Subscriber LinesIss 1 Dwg 14; App 1 Dwg 15
BT-2262531938-01-112110.74 KBPanel System - Emergency Alarm Circuit - Trouble Desk - Main Alarm Board or Floor Alarm BoardIss 2 Dwg 13
BT-2263091938-04-151441.26 KBPanel System - Selector Time AlarmIss 1 Dwg 17
BT-2263491938-03-113515.24 KBPanel System - Motor Stop and Frame Busy Circuits - For Use with Main and Floor Alarm BoardsIss 3 Dwg 21D; App 1 Dwg 22
BT-2263781937-11-1913.27 MBPanel System - District Selector - For Coin Lines, with Message Register - If Specified, Battery Ground at End - For Panel LinefinderIss 1 Dwg 25; App 1 Dwg 31
BT-2263791938-01-111721.47 KBPanel System - Line Finder Time Alarm Circuit - Panel Line Finder - Battery Grounded at One EndIss 1 Dwg 17; App 1 Dwg 18
CD-22646736AC1.42 MBPanel Systems - Trunk Test Cord - Trouble DeskIss 36AC Dwg 36AC
BT-2266171941-10-072856.01 KBPanel Systems - 2-Party Message Line and Trip Circuit - Panel Line Finder - Battery Grounded at EndIss 2 Dwg 19
BT-2268861938-01-1122.37 MBPanel System - Inter-Office Incoming - From Key Indicator System - From Mechanical with 900 Ohm - 1300 Ohm Fundaments or Full Mechanical TandemIss 2 Dwg 23; App 1 Dwg 24
BT-2269091938-04-071633.38 KBPanel System - Line and Trip Circuit, Panel Line Finder - Ind. Message, Coin, and Flat Rate LinesIss 1 Dwg 18
BT-2393751925-06-231416.29 KBPanel Machine Switching System - Permanent Signal Trunk Group - Overflow Meter CircuitIss 1 Dwg 4
CD-23938235D7.31 MBPanel System - Automatic Test of Final SelectorsIss 35D Dwg 35D
BT-2394131937-12-312516.80 KBPanel Machine Switching System - Dialing Set for Subscribers District SelectorsIss 2 Dwg 13
BT-2394441931-08-242629.30 KBPanel System - Trunk Line - Two-Way to Final Multiple, Line Switch - Line Finder or Manual Switchboard - To DesksIss 2 Dwg 12
CD-23944414D73.62 KBPanel Systems - Trunk Line - 2-Way to Final Multiple, Line Switch - Line Finder or Manual Switchboard to DesksIss 14D Dwg 14D
BT-2395151929-03-2132.01 MBSubscribers' District Selectors - Line Finder Type - Panel SystemIss 3 Dwg 19
BT-2395151942-09-02510.84 MBPanel System - Automatic Test of Subscribers District Selector - Line Finder TypeIss 5 Dwg 35; App 1 Dwg 37; App 2 Dwg 39; App 3 Dwg 40; App 4 Dwg 41; App 5 Dwg 46
CD-23951555D7.23 MBPanel System - Automatic Test of Subscribers District Selector - Line Finder TypeIss 55D Dwg 55D; App 1AR Dwg 56AR; App 2AC Dwg 57AC
BT-2395891925-01-3111.20 MBThree Wire Dialing Incoming Selector Circuit - Incoming from "A" Swbd.Iss 1 Dwg 12
CD-2396551937-10-0812D1.91 MBPanel System - Two-Wire Incoming Selector from Toll Key Indicator System - Direct, Two and Four Party Semi-SelectiveIss 12D Dwg 12D; App 13D Dwg 13D; App 14D Dwg 14D; App 15AR Dwg 15AR
CD-23966443D1.16 MBPanel System - Final Circuit With Time Measure Release on Permanent SignalsIss 43D Dwg 43D
BT-2396651946-09-2441.76 MBPanel System - Final Circuit - With Time Measure Release On Permanent Signal and for Routine Testing of Subscriber's LinesIss 4 Dwg 31
CD-23966538D1.45 MBPanel Systems - Final Circuit With Time Measure Release On Permanent Signal and for Routine Testing of Subscriber's LinesIss 38D Dwg 38D
CD-23981033D5.14 MBPanel Systems - Automatic Test of Incoming SelectorsIss 33D Dwg 33D
CD-2398441937-03-3123D6.26 MBPanel System - Selector Test Circuit for Testing Office Incoming and Final SelectorsIss 23D Dwg 23D; App 24D Dwg 24D
BT-2400711941-06-0634.11 MBPanel System - Selector Circuit - District and Panel Line Finder for Non-Coin LinesIss 3 Dwg 38; App 1 Dwg 39
BT-2400751942-04-1313.80 MBPanel System - Selector Circuit District for Coin Lines with Message Register if Specified for Panel Line FinderIss 1 Dwg 27; App 1 Dwg 29; App 2 Dwg 30
BT-2402061938-03-293430.00 KBPanel System - Link and Selector Time Alarm Circuit - Using Interrupter and RelaysIss 3 Dwg 10
BT-2402931932-06-1511002.45 KBPanel System - Starting Circuit - For Use with Panel Line Finder - With Trip Circuit Lockout FeatureIss 1 Dwg 12
CD-3571709D442.81 KBToll Systems - Toll Test Board No. 5 - Two-Way Ringdown Trunk or Dial Trunk Circuit to Offices for Use Where Trunks are MultipledIss 9D Dwg 9D
BT-3580381940-06-2621.07 MBPanel System - Local Test Desk No. 12-B - Telephone Circuit Arranged for Loud Speaker Trunk CircuitIss 2 Dwg 10
BT-3593731938-04-203767.84 KBPanel System - Local Test Desk No. 12-B - Test Circuit - Supplementary Test FeaturesIss 3 Dwg 7; App 1 Dwg 10; App 2 Dwg 11
BT-4311401921-03-034709.39 KBIndividual Line Circuit - Schematic for Full Mechanical Switching SystemIss 4 Dwg 4
BT-4311411920-03-027285.29 KBMake Busy Circuit - Relay Call Indicator Trunk - Full Mechanical Switching SystemIss 7 Dwg 7
BT-4311511921-07-098450.16 KBCoin Collect Circuit - For Long Distance Incoming Cordless Trunks - Arranged for Offices Requiring Breakdown Protection - For Final or Line Switch Multiple Banks - Full Mechanical Switching SystemIss 8 Dwg 8
BT-4311531921-10-20121.06 MBTelephone Circuit - Trunk Supervisor - For Use with Long Distance Cordless Trunk Positions - Arranged for Audible and Visual Signal - Full Mechanical Power Driven SystemIss 12 Dwg 12
BT-4311561922-02-1851.71 MBFinal Circuit - With Marginal Relay Test - Full Mechanical Switching SystemIss 5 Dwg 6; App 1 Dwg 6
BT-4311801920-04-091180.99 KBSignal Circuit - Message Register - Full Mechanical Switching SystemIss 1 Dwg 1
BT-4311811921-02-085149.06 KBSignal Circuit - Coin Collect - Full Mechanical Switching SystemIss 5 Dwg 5
BT-4311821920-04-154256.33 KBSignal Circuit - Flashing Re-Call - Full Mechanical Switching SystemIss 4 Dwg 4
BT-4311831921-02-083262.33 KBSignal Circuit - Dialing and Dial Tone to Operator - Full Mechanical Switching SystemIss 3 Dwg 3
BT-4311841921-04-2881.03 MBCord Circuit - Zero and Intercepting - Arranged for Flashing Recall and for Dialing - On Line - For Use on M.R. and C.C. Lines - Full Mechanical Switching SystemIss 8 Dwg 8
BT-4311931922-04-2921.58 MBTrunk Circuit - Schematic for Through Wire Local Incoming from Full Mechanical Switching SystemIss 2 Dwg 2; App 1 Dwg 3
BT-4311991926-04-264669.88 KBSelector Circuit - Incoming From Manual Key Indicator - Panel Machine Switching SystemIss 4 Dwg 16
BT-4312041920-03-013482.14 KBLine Circuit - Blank Incoming - For Use as Intercepted Line - Full Mechanical Switching SystemIss 3 Dwg 3
BT-4312171920-03-011227.62 KBLine Circuit - Intercepting - Arranged For Use As Blank Final Line - Or Lines for Deined Service - Full Mechanical Switching SystemIss 1 Dwg 1
BT-4312201921-04-082425.59 KBTwo Way - Arranged for Cross-Connection - To Miscellaneous Answering Jack and Lamp At Special "A" Board - Full Mechanical Switching SystemIss 2 Dwg 2
BT-4312251922-02-1842.00 MBFinal Selector Circuit - With Marginal Test - Arranged for Routine Subscriber's Line Testing - Full Mechanical Switching SystemIss 4 Dwg 4; App 1 Dwg 5
BT-4312421921-04-272330.38 KBTelephone Circuit - Without Incoming Call Circuit and Checking Multiple - Arranged to Trip Machine Ringing - Full Mechanical Switching SystemIss 2 Dwg 2
BT-4312491921-10-2021.12 MBTrunk Circuit - Incoming From Central Test Desk - Full Mechanical Switching SystemIss 2 Dwg 2
BT-4312511923-05-2961.41 MBFinal Selector Circuit - Panel Machine Switching SystemIss 6 Dwg 17
BT-4312621920-04-027179.99 KBSignal Circuit - Interrupted Flash - Selector Frames - Full Mechanical Power Driven SystemIss 7 Dwg 7
BT-4312781923-07-274459.77 KBSignal Circuit Register - Overflow and Peg Count, Panel Machine Switching SystemIss 4 Dwg 25
BT-4313001920-03-011265.64 KBLine Circuit - Test to Last Position Toll or Local Switchboard or Head of Toll Switchboard - Arranged for Cross Connection in Rear of Section - Relays on Relay Rack - Local Test Desk - Full Mechanical Power Driven SystemIss 1 Dwg 1
BT-4313011920-04-074493.10 KBTelephone Circuit - With Repeatering Coil Monitoring Feature - Arranged for Transfer Key - Local Test Desk - Full Mechanical Power Driven SystemIss 4 Dwg 4
BT-4313031920-03-033275.75 KBSignal Circuit - Auxiliary - Audible Signal - Local Test Desk - Full Mechanical Power Driven SystemIss 3 Dwg 3
BT-4313041920-04-212358.69 KBRinging Circuit - For Secondary Testing Cord Circuit - Local Test Desk - Full Mechanical Power Driven SystemIss 2 Dwg 2
BT-4313071920-05-27102.07 MBCord Circuit - Testing - Primary and Secondary - Local Test Desk - Full Mechanical Power Driven SystemIss 10 Dwg 10
BT-4313081920-04-093826.68 KBTrunk Circuits - Incoming Key End - Arranged for Cross Connecting in Rear of Desk - Local Test Desk - Full Mechanical Power Driven SystemIss 3 Dwg 3
BT-4313101921-03-083379.96 KBLine Circuit - Tests to Special "A" Switchboard Zero Position and Sender Monitor - Arranged for Cross Connection in Rear of Section - Relays on Relay Rack - Local Test Desk - Full Mechanical Power Driven SystemIss 3 Dwg 3
BT-4313111921-03-012250.32 KBSignal Circuit - Buzzer and Sounder Equipment - Local Test Desk - Full Mechanical Power Driven SystemIss 2 Dwg 2
BT-4313121920-07-082651.99 KBWheatstone Bridge Circuit - Local Test Desk - Full Mechanical Power Driven SystemIss 2 Dwg 2
BT-4313231921-07-053515.78 KBLine Circuit - Blank Incoming - For Use as Intercepted Line - Full Mechanical Power Driven SystemIss 3 Dwg 3
BT-4313281919-11-181111.22 KBLine Circuit - Various Answering Jack Arrangements - Special "A" Switchboard - Full Mechanical Power Driven SystemIss 1 Dwg 1