| Section
| Date
| Issue
| Size
| Title
|
| 216-000-000 | 1984-06-01 | 24 | 650.63 KB | Numerical Index - Division 216 - No. 1 Crossbar Offices |
| 216-020-610PT A | 1979-12-01 | A | 126.84 KB | Line Load Control - Operating Methods - No. 1 Crossbar Offices |
| 216-102-301 | 1960-09-01 | 4 | 464.10 KB | Trouble Indicator Records - No. 1 Crossbar Offices |
| 216-106-301 | 1958-03-01 | 2 | 543.05 KB | Originating and Terminating Load Control - No. 1 Crossbar Offices |
| 216-107-301PN X1 | 1970-05-01 | A | 228.51 KB | Procedure in Case of Subscriber Cable Failure Using the Permanent Signal Identification Circuit (SD-95817) - No. 1 Crossbar Offices |
| 216-110-301 | 1950-07-01 | 1 | 302.14 KB | Procedure for Making Cutover Preparation Tests During Installation Load Test - No. 1 Crossbar Offices |
| 216-112-501 | 1965-12-01 | 5 | 910.57 KB | Line Cross-Connections, Class-of-Service, Message Register, ANI Line Verification, and Message Timing - Tests - No. 1 Crossbar Offices |
| 216-112-501PN A | 1973-07-01 | A | 69.22 KB | Line Cross-Connection, Class of Service, Message Register Tests and ANI Line Verification Tests - No. 1 Crossbar Offices |
| 216-112-501PN A | 1960-06-01 | B | 559.89 KB | Line Cross-Connection, Class of Service, Message Register Tests and ANI Line Verification Tests - No. 1 Crossbar Offices |
| 216-112-501PT X1 | 1970-01-01 | C | 243.33 KB | Line Message Register Tests and Register Assignments - No. 1 Crossbar Offices |
| 216-112-900PT A | 1980-08-01 | A | 30.41 KB | Vitel 2900 B Local Message Metering System - Cross-Connection and Line Identification Tests - No. 1 Crossbbar |
| 216-200-301 | 1961-01-01 | 5 | 269.48 KB | Method of Denying and Restoring Service on Customer Lines - No. 1 Crossbar Offices |
| 216-200-301PT A | 1977-03-01 | A | 24.77 KB | Methods of Denying and Restoring Service on Customer Lines - No. 1 Crossbar Offices |
| 216-201-501 | 1971-12-01 | 4 | 756.81 KB | Subscriber Lines and Outgoing Trunks - Voltmeter Tests Using OGT Test Frame SD-25177-01 - No. 1 Crossbar Offices |
| 216-205-501 | 1962-11-01 | 2 | 80.00 KB | Line Circuit - Terminating Service Only For Use With Dial Selected PBX Trunks - Tests - No. 1 Crossbar Offices |
| 216-208-502 | 1954-09-01 | 1 | 186.67 KB | Auxiliary Line Circuit Arranged for Manual Terminating Service Per SD-25138-01 and SD-25140-01 - Tests - No. 1 Crossbar Offices |
| 216-208-504 | 1953-06-01 | 1 | 157.29 KB | Auxiliary Line Circuits Serving More Than One Office in the Same Building - Tests - No. 1 Crossbar Offices |
| 216-209-501 | 1963-04-01 | 6 | 1.24 MB | Line Link and Controller - Tests - No. 1 Crossbar Offices |
| 216-210-502 | 1962-11-01 | 5 | 609.66 KB | Line Choice Connector Circuits - Tests - No. 1 Crossbar Offices |
| 216-230-501 | 1962-11-01 | 5 | 2.17 MB | Subscriber District Junctors - Tests Using District Junctor Test Circuit - No. 1 Crossbar Offices |
| 216-230-501 A | 1967-12-01 | 1 | 1.08 MB | Subscriber District Junctors - Tests Using District Junctor Test Circuit - No. 1 Crossbar Offices |
| 216-230-503 | 1962-11-01 | 3 | 109.18 KB | District Junctors - Interrupter Checking Circuit Alarms - Tests - No. 1 Crossbar Offices |
| 216-230-900PT | 1976-05-01 | A | 114.84 KB | Subscriber District Junctors - Tests Using District Junctor Test Circuit - No. 1 Crossbar Offices Equipped With Vitel 2900B Local Message Metering System |
| 216-231-501 | 1958-10-01 | 4 | 422.25 KB | District Link and Connector Circuits - Tests - No. 1 Crossbar Offices |
| 216-232-501 | 1948-09-01 | 1 | 111.70 KB | Permanent Signal Overflow Alarms - Tests - No. 1 Crossbar Offices |
| 216-233-501 | 1952-11-01 | 3 | 495.64 KB | Coin Supervisory Circuits - Tests Using District Junctor Test Circuit - No. 1 Crossbar Offices |
| 216-233-502 | 1952-10-01 | 3 | 311.19 KB | Coin Supervisory Circuits - Miscellaneous Tests - No. 1 Crossbar Offices |
| 216-233-503 | 1954-04-01 | 3 | 310.65 KB | Coin Supervisory Link Controller - Tests - No. 1 Crossbar Offices |
| 216-233-900PT | 1972-05-01 | A | 596.56 KB | Coin Supervisory Circuit - Tests Using CMC 734 Test Set - No. 1 Crossbar Offices |
| 216-240-501 | 1962-11-01 | 5 | 512.32 KB | Office Link and Connector Circuits - No. 1 Crossbar Offices |
| 216-240-501 A | 1977-04-01 | 1 | 27.27 KB | Office Link and Connector Circuits - Tests - No. 1 Crossbar Offices |
| 216-246-501 | 1959-09-01 | 4 | 285.92 KB | Number Group Connector - Tests - No. 1 Crossbar Offices |
| 216-251-501 | 1977-05-01 | 13 | 40.27 MB | Subscriber, Auxiliary, and "A" Switchboard Keypulsing Senders - Tests Using Originating Sender Test Frame SD-25221-01 - No. 1 Crossbar Offices |
| 216-251-900PT | 1977-05-01 | A | 1.07 MB | American Telecommunications Corporation Model 204 TonePulse Converter - No. 1 Crossbar Offices and Step-by-Step Systems |
| 216-251-900PT X1 | 1977-07-01 | A | 83.83 KB | American Telecommunications Corporation Model 204 TonePulse Converter - Acceptance Tests - No. 1 Crossbar Offices |
| 216-251-901PT | 1978-03-01 | A | 699.58 KB | American Telecommunications Corporation Model 205 TonePulse Converter - No. 1 Crossbar Systems |
| 216-252-501 | 1971-06-01 | 4 | 8.29 MB | Subscriber Sender Link and Controller SD-25004-01 - Tests - No. 1 Crossbar Offices |
| 216-252-502 | 1971-05-01 | 3 | 13.79 MB | Subscriber Sender Link and Controller SD-25554-01 - Operation Tests - No. 1 Crossbar Offices |
| 216-258-503 | 1962-11-01 | 2 | 1017.73 KB | Code Compressor Connector - Tests - No. 1 Crossbar Offices |
| 216-258-507 | 1963-02-01 | 1 | 493.75 KB | Miscellaneous Circuit - Recycle Frame - Tests - No. 1 Crossbar Offices |
| 216-261-501 | 1978-01-01 | 11 | 1.43 MB | Originating Marker Tests Using Originating Trouble Indicator - No. 1 Crossbar Offices |
| 216-261-502 | 1971-12-01 | 5 | 269.35 KB | Originating Marker - Miscellaneous Tests - No. 1 Crossbar Offices |
| 216-261-503 | 1966-02-01 | 1 | 105.62 KB | Originating Marker - Route and Rate Cross-Connections Tests Using Route and Rate Verification Test Circuit SD-27720-01 - No. 1 Crossbar Offices |
| 216-261-900PT | 1973-10-01 | A | 289.18 KB | Route Verification Tests Using Route Verification Unit PJ25012 - No. 1 Crossbar Offices |
| 216-261-900PT A | 1974-07-01 | A | 46.34 KB | Route Verification Tests Using Route Verification Unit PJ25012 - No. 1 Crossbar Offices |
| 216-261-901PT | 1976-05-01 | A | 335.04 KB | Originating Marker Tests Using Originating Trouble Indicator - No. 1 Crossbar Offices Equipped with Vitel 2900B Local Message Metering System |
| 216-262-501 | 1972-04-01 | 1 | 117.45 KB | Dynamic Overload Control Circuit SD-27970-01 - Tests - No. 1 Crossbar Offices |
| 216-263-501 | 1972-07-01 | 5 | 535.92 KB | Originating Marker Connectors - Manual Test - No. 1 Crossbar Offices |
| 216-271-501 | 1971-12-01 | 4 | 1.51 MB | Subscriber Recording-Completing Trunks and Special Service Trunks - Tests Using Outgoing Trunk Test Frame SD-25177-01 - No. 1 Crossbar Offices |
| 216-272-501 | 1979-10-01 | 8 | 367.88 KB | Permanent Signal Holding Trunks SD-25126-01 and SD-25425-01 - Tests Using Outgoing Trunk Test Frame SD-25177-01 - No. 1 Crossbar Offices |
| 216-272-502 | 1979-07-01 | 4 | 335.77 KB | Permanent Signal Holding Trunk SD-25418-01 - Tests - No. 1 Crossbar Offices |
| 216-272-503 | 1965-11-01 | 1 | 315.27 KB | Permanent Signal Holding Trunk SD-55870-01 - Tests - No. 1 Crossbar Offices |
| 216-272-504 | 1978-04-01 | 2 | 403.68 KB | Permanent Signal Holding Trunk SD-95554-01 and Concentrating Circuit SD-25766-01 - Tests - No. 1 Crossbar Offices |
| 216-273-501 | 1972-02-01 | 5 | 190.78 KB | Vacant Code Trunks - Tests - No. 1 Crossbar Offices |
| 216-276-501 | 1978-10-01 | 4 | 802.14 KB | Outgoing Trunks - Tests Using Outgoing Trunk Test Frame SD-25177-01 - No. 1 Crossbar Offices |
| 216-276-501PT X1 | 1981-11-01 | A | 352.52 KB | Outgoing Trunks - Tests Using Outgoing Trunk Test Frame SD-25177-01 - No. 1 Crossbar Offices |
| 216-277-501 | 1962-11-01 | 5 | 213.78 KB | Trunk Circuits Using Automatic Incoming Test Circuit SD-25161-01 - No. 1 Crossbar Offices |
| 216-278-501 | 1964-09-01 | 3 | 54.01 KB | Continuity and Polarity Test of Outgoing Trunks at Outgoing Trunk Test Frame Using Test Circuit SD-96370-01 - No. 1 Crossbar Offices |
| 216-301-501 | 1978-10-01 | 6 | 821.32 KB | Full Selector Terminating Senders - Tests Using Terminating Sender Test Circuit SD-25159-01 - No. 1 Crossbar Offices |
| 216-301-502 | 1939-10-01 | 2 | 236.56 KB | Full Selector Terminating Senders - Tests Using Outgoing Trunk Test Circuit SD-25177-01 and Test Selection Circuit SD-25437-01 - No. 1 Crossbar Offices |
| 216-303-501 | 1968-09-01 | 3 | 459.54 KB | Multifrequency Terminating Sender and Associated Receiver - Tests Using Automatic Terminating Sender Test Circuit SD-25159-01 - No. 1 Crossbar Offices |
| 216-305-501 | 1980-07-01 | 5 | 735.29 KB | Dial Pulse Terminating Senders - Tests Using Terminating Sender Test Circuit SD-25159-01 - No. 1 Crossbar Offices |
| 216-307-501 | 1960-02-01 | 5 | 794.53 KB | Terminating Sender Link and Controller - Tests - No. 1 Crossbar Offices |
| 216-331-501 | 1978-04-01 | 10 | 1.54 MB | Terminating Marker and Terminating Marker Applique - Tests Using Terminating Trouble Indicator SD-25284-01 - No. 1 Crossbar Offices |
| 216-331-502 | 1972-02-01 | 6 | 541.50 KB | Terminating Marker SD-25283-01 and Terminating Marker Applique SD-27765-01 - Miscellaneous Tests - No. 1 Crossbar Offices |
| 216-340-501 | 1960-02-01 | 4 | 691.50 KB | Terminating Marker Connectors - Tests - No. 1 Crossbar Offices |
| 216-361-501 | 1959-11-01 | 4 | 700.41 KB | Incoming Link and Connector Circuits - Tests - No. 1 Crossbar Offices |
| 216-365-501 | 1975-07-01 | 3 | 73.05 KB | Incoming Trunk Frame Alarms - Tests - No. 1 Crossbar Offices |
| 216-370-501 | 1962-11-01 | 2 | 102.06 KB | Incoming Selector and Incoming Trunk Circuits From Toll Switchboards - Coin Control Tests - No. 1 Crossbar Offices |
| 216-372-501 | 1962-11-01 | 4 | 378.67 KB | Incoming Trunks Using Outgoing Trunk Test Frame SD-25177-01 - No. 1 Crossbar Offices |
| 216-381-501 | 1968-02-01 | 1 | 837.24 KB | Incoming Trunk Tests Using Test Set SD-25187-01 (J24751A) - No. 1 Crossbar Offices |
| 216-383-501 | 1962-11-01 | 2 | 51.57 KB | Continuity and Polarity Test of Outgoing Trunks at Outgoing Trunk Test Frame Using Test Circuit SD-96370-01 - No. 1 Crossbar Offices |
| 216-383-503 | 1962-11-01 | 3 | 611.51 KB | Outgoing Trunks Using Outgoing Trunk Test Frame SD-25177-01 - No. 1 Crossbar Offices |
| 216-388-501 | 1971-07-01 | 1 | 182.50 KB | Direct Inward Dialing Line Circuits SD-27752-01 and SD-27753-01 - Tests Using DID Test Circuit SD-27766-01 - No. 1 Crossbar Offices |
| 216-397-501 | 1971-10-01 | 2 | 196.08 KB | AIS Line Circuits SD-27750-01 and SD-27751-01 and MF Outgoing Sender SD-27761-01 - Tests Using Outgoing Trunk Test Frame SD-25177-01 - No. 1 Crossbar Offices |
| 216-401-301 | 1953-11-01 | 1 | 409.43 KB | Taking Equipment Out of Service - Major Units of Equipment - No. 1 Crossbar Offices |
| 216-403-301 | 1950-11-01 | 2 | 368.40 KB | Taking Equipment Out of Service - Subscriber Line Link Frame - No. 1 Crossbar Offices |
| 216-405-301 | 1950-07-01 | 2 | 364.94 KB | Taking Equipment Out of Service - District Junctor Frame - No. 1 Crossbar Offices |
| 216-407-301 | 1937-06-01 | 1 | 141.55 KB | Taking Equipment Out of Service - District Link Frame - No. 1 Crossbar Offices |
| 216-409-301 | 1937-07-01 | 1 | 195.58 KB | Taking Equipment Out of Service - District Coin Control Circuit - Coin Control Link and Control Frame - Key Pulsing "A" Sender Link and Control Frame - No. 1 Crossbar Offices |
| 216-410-301 | 1941-04-01 | 2 | 265.60 KB | Office Link Frame - Taking Equipment Out of Service - No. 1 Crossbar Offices |
| 216-412-301 | 1978-10-01 | 5 | 260.15 KB | Alarm Sending and Transfer Circuits - Taking Equipment Out of Service - No. 1 Crossbar Offices |
| 216-413-301 | 1938-04-01 | 1 | 157.01 KB | Taking Equipment Out of Service - Number Group Connector Circuit - No. 1 Crossbar Offices |
| 216-415-301 | 1951-09-01 | 1 | 71.62 KB | Taking Equipment Out of Service - Subscriber and Key Pulsing Senders - No. 1 Crossbar Offices |
| 216-417-301 | 1951-09-01 | 2 | 374.79 KB | Taking Equipment Out of Service - Subscriber Sender Link and Controller Circuits - No. 1 Crossbar Offices |
| 216-419-301 | 1937-06-01 | 1 | 91.50 KB | Taking Equipment Out of Service - Originating Marker Connector Frame - No. 1 Crossbar Offices |
| 216-421-301 | 1946-04-01 | 2 | 271.78 KB | Taking Equipment Out of Service - Terminating Sender Link and Controller Circuit - Terminating, "B", Dial Pulsing and MF Key Pulsing Senders - No. 1 Crossbar Offices |
| 216-423-301 | 1937-06-01 | 1 | 111.89 KB | Taking Equipment Out of Service - Terminating Marker and Terminating Marker Connector Frames - No. 1 Crossbar Offices |
| 216-425-301 | 1937-09-01 | 1 | 458.63 KB | Taking Equipment Out of Service - Incoming Trunk Frame - No. 1 Crossbar Offices |
| 216-427-301 | 1937-09-01 | 1 | 179.60 KB | Taking Equipment Out of Service - Incoming Link Frame - No. 1 Crossbar Offices |
| 216-429-301 | 1938-04-01 | 1 | 165.63 KB | Taking Equipment Out of Service - Line Choice Connector Circuit Per SD-25275-01 - No. 1 Crossbar Offices |
| 216-433-301 | 1973-05-01 | 5 | 2.52 MB | Taking Equipment Out of Service - Interrupter Frame - No. 1 Crossbar Offices |
| 216-435-301 | 1952-01-01 | 1 | 285.76 KB | Taking Equipment Out of Service - Translators - No. 1 Crossbar Offices Arranged for AMA |
| 216-437-301 | 1964-04-01 | 2 | 230.55 KB | Taking Equipment Out of Service - Transverters - No. 1 Crossbar Offices Arranged for AMA |
| 216-439-301 | 1950-11-01 | 1 | 157.57 KB | Taking Equipment Out of Service - Transverter Connectors - No. 1 Crossbar Offices Arranged for AMA |
| 216-441-301 | 1951-01-01 | 1 | 155.78 KB | Taking Equipment Out of Service - Call Identity Indexers - No. 1 Crossbar Offices Arranged for AMA |
| 216-443-301 | 1953-02-01 | 2 | 564.08 KB | Taking Equipment Out of Service - Recorder and Recorder Connector Circuits - No. 1 Crossbar Offices Arranged for AMA |
| 216-501-301 | 1958-06-01 | 3 | 505.46 KB | Line Load Control - Operating Methods - No. 1 Crossbar Offices |
| 216-501-301PN A | 1965-01-01 | A | 21.01 KB | Line Load Control - Operating Methods - No. 1 Crossbar Offices |
| 216-508-301 | 1962-11-01 | 4 | 1.21 MB | Fuse Alarm Routine - No. 1 Crossbar Offices |
| 216-509-301 | 1962-11-01 | 3 | 460.50 KB | Motor Stop Alarm Routine - No. 1 Crossbar Offices |
| 216-510-301 | 1937-06-01 | 1 | 1.46 MB | Subscriber Line Link Frame Alarm Routine - No. 1 Crossbar Offices |
| 216-511-301 | 1962-11-01 | 3 | 868.24 KB | District Link, Trunk Link and Office Link Frames Alarm Routine - No. 1 Crossbar Offices |
| 216-512-301 | 1962-11-01 | 3 | 521.59 KB | Interrupter Checking Circuit Alarm Routine - District Junctors and Tandem Trunks - No. 1 Crossbar Offices |
| 216-513-301 | 1937-08-01 | 1 | 915.03 KB | Coin Control Circuit Time Alarm Routine - No. 1 Crossbar Offices |
| 216-514-301 | 1938-05-01 | 1 | 494.98 KB | Subscribers Sender Load Alarm Routine - No. 1 Crossbar Offices |
| 216-516-301 | 1937-06-01 | 1 | 1.61 MB | Subscriber Sender Link Frame Alarm Routine - No. 1 Crossbar Offices |
| 216-518-301 | 1945-08-01 | 1 | 3.11 MB | Subscriber Sender Link and Controller - Trouble Indicator Routine for Handling Alarms and Displays - No. 1 Crossbar Offices |
| 216-520-301 | 1937-08-01 | 1 | 1.30 MB | Key Pulsing "A" Sender Link and Control Frame - Coin Control Link and Control Frame Alarm Routine - No. 1 Crossbar Offices |
| 216-524-301 | 1937-08-01 | 1 | 769.78 KB | Originating Marker Connector Time Alarm Routine - No. 1 Crossbar Offices |
| 216-526-301 | 1937-06-01 | 1 | 3.93 MB | Originating Trouble Indicator Alarm Routine - No. 1 Crossbar Offices |
| 216-530-301 | 1937-06-01 | 1 | 541.21 KB | Permanent Signal Overflow Alarm Routine - No. 1 Crossbar Offices Not Arranged for AMA |
| 216-532-301 | 1948-11-01 | 2 | 714.65 KB | Incoming Trunk Frame Alarm Routine - No. 1 Crossbar Offices |
| 216-534-301 | 1937-07-01 | 1 | 837.57 KB | Incoming Link and Connector Frame - Line Choice Connector Frame - Number Group Connector Frame Alarm Routine - No. 1 Crossbar Offices |
| 216-536-301 | 1940-01-01 | 2 | 766.76 KB | Terminating Sender Time Alarm Routine - No. 1 Crossbar Offices |
| 216-538-301 | 1937-06-01 | 1 | 601.56 KB | Terminating Sender Link Frame Alarm Routine - No. 1 Crossbar Offices |
| 216-540-301 | 1937-12-01 | 1 | 705.18 KB | Terminating Marker Alarm Routine - No. 1 Crossbar Offices |
| 216-542-301 | 1937-08-01 | 1 | 1019.29 KB | Terminating Marker Connector Alarm Routine - No. 1 Crossbar Offices |
| 216-544-301 | 1938-04-01 | 1 | 2.68 MB | Terminating Trouble Indicator Alarm Routine - No. 1 Crossbar Offices |
| 216-552-301 | 1937-06-01 | 1 | 1.36 MB | Originating Marker Alarm Routine - No. 1 Crossbar Offices |
| 216-555-301 | 1962-11-01 | 2 | 590.58 KB | Dial Tone Speed Register Circuit and Dial Tone Speed Indicating Circuit Alarm Routine - No. 1 Crossbar Offices |
| 216-570-301 | 1945-03-01 | 3 | 1.77 MB | Originating Sender Supervisory Signals - Method of Handling - No. 1 Crossbar Offices |
| 216-572-302 | 1961-01-01 | 3 | 5.66 MB | Permanent Signal Holding Trunks - Method of Handling Permanent Signals - No. 1 Crossbar Offices With or Without Automatic Number Identification |
| 216-575-301 | 1945-04-01 | 1 | 1.46 MB | Coin Supervisory Signals - Method of Handling When Served by a DSA Board in Another Building - No. 1 Crossbar Offices |
| 216-600-305 | 1977-09-01 | 1 | 748.09 KB | Code Compressor Trouble Indicator - Automatic Trouble Analysis - Trouble Reference Guide - No. 1 Crossbar System |
| 216-600-306 | 1977-09-01 | 1 | 263.71 KB | Stuck Sender Trunk Identification - Automatic Trouble Analysis - Trouble Reference Guide - No. 1 Crossbar System |
| 216-601-300 | 1943-06-01 | 3 | 722.02 KB | Analyzing, Locating and Clearing Trouble Conditions - No. 1 Crossbar Offices |
| 216-601-301 | 1953-05-01 | 2 | 2.31 MB | Analyzing, Locating and Clearing Trouble Conditions - Index for Sections Covering Trouble Conditions - No. 1 Crossbar Offices |
| 216-603-301 | 1944-11-01 | 1 | 2.32 MB | Crosses or False Grounds on Subscriber Line Link Frame - LR Relay - No. 1 Crossbar Offices |
| 216-605-301 | 1944-04-01 | 2 | 1.44 MB | Line Link Double Connections on Originating Calls - No Alarm Indications - No. 1 Crossbar Dial Offices |
| 216-607-301 | 1941-10-01 | 1 | 235.69 KB | Falsely Grounded District Junctor DC Lead - No. 1 Crossbar Offices |
| 216-609-301 | 1941-10-01 | 1 | 883.50 KB | Open Subscriber Sender of Relay Shunt Circuit - No. 1 Crossbar Offices |
| 216-610-101 | 1977-04-01 | 1 | 4.81 MB | Stuck Sender Trunk Identification (SSTI) Feature - Description, Operation, and Trouble Locating - No. 1 Crossbar Offices |
| 216-611-301 | 1941-10-01 | 1 | 359.81 KB | Crossed Contact of Subscriber Sender Link GP Relay - No. 1 Crossbar Offices |
| 216-613-301 | 1941-10-01 | 1 | 246.33 KB | Falsely Grounded Subscriber Sender Link DC Lead - No. 1 Crossbar Offices |
| 216-615-301 | 1955-10-01 | 2 | 443.86 KB | Failure of Subscriber Sender Link Controller to Start or Time Out - No. 1 Crossbar Offices |
| 216-617-301 | 1944-12-01 | 1 | 342.61 KB | False Operation of Subscriber Sender Link C Relay - No. 1 Crossbar Offices |
| 216-619-301 | 1944-12-01 | 1 | 202.03 KB | Failure of a Subscriber Sender Link G Relay to Close the OG Lead - No. 1 Crossbar Offices |
| 216-623-301 | 1944-12-01 | 1 | 211.41 KB | False Trouble Release From Originating Marker Due to Crossed Contacts on the DT1 Relay - No. 1 Crossbar Offices |
| 216-625-301 | 1966-04-01 | 2 | 232.28 KB | Crossed Originating Marker Multiple SL Leads - No. 1 Crossbar Offices |
| 216-627-301 | 1944-12-01 | 2 | 293.34 KB | Premature Release of Originating Marker - No. 1 Crossbar Offices |
| 216-629-301 | 1941-10-01 | 1 | 312.33 KB | False Continuity of Originating Marker Connector DC Lead - No. 1 Crossbar Offices |
| 216-631-301 | 1973-03-01 | 2 | 829.44 KB | Originating Marker Receiving Lead Permanently Closed - Originating Marker Connector - No. 1 Crossbar Offices |
| 216-633-301 | 1943-10-01 | 1 | 380.36 KB | Open Transmitting Lead Between Originating Marker and Sender - No. 1 Crossbar Offices |
| 216-634-901PN | 1966-11-01 | B | 606.80 KB | Open B Leg of Channel - No. 1 Crossbar Dial Offices |
| 216-634-901PT | 1963-01-01 | A | 201.42 KB | Open B Leg of Channel - No. 1 Crossbar Offices |
| 216-634-902PN | 1966-11-01 | B | 374.60 KB | Open Battery Supply to Originating Marker CH- Relays - No. 1 Crossbar Dial Offices |
| 216-635-301 | 1943-06-01 | 1 | 948.74 KB | Office Frame ST Lead Crossed with Battery - No. 1 Crossbar Offices |
| 216-637-301 | 1941-10-01 | 1 | 798.81 KB | Crossed Contacts of Office Link Frames SS Relays - No. 1 Crossbar Offices |
| 216-639-301 | 1941-10-01 | 1 | 754.51 KB | Failure of Office Link and Connector MP Relay - No. 1 Crossbar Offices |
| 216-641-301 | 1941-10-01 | 1 | 916.52 KB | Falsely Grounded Terminating Sender FC Lead - No. 1 Crossbar Offices |
| 216-643-301 | 1947-02-01 | 3 | 707.67 KB | Terminating Sender Link Alarms Due to False Ground on the SM Lead - No. 1 Crossbar Offices |
| 216-644-301 | 1942-09-01 | 2 | 934.63 KB | Falsely Grounded Terminating Sender Link FC Lead - No. 1 Crossbar Offices |
| 216-645-301 | 1948-10-01 | 1 | 846.18 KB | Falsely Grounded Terminating Sender D Lead - No. 1 Crossbar Offices |
| 216-647-301 | 1941-10-01 | 1 | 337.50 KB | Failure of Terminating Marker Short Time Out - No. 1 Crossbar Offices |
| 216-649-301 | 1941-10-01 | 1 | 872.09 KB | Terminating Marker Continuity Failure - Operating Path of Incoming Link and Connector RS Relay and Terminating Marker MKO Relay - No. 1 Crossbar Offices |
| 216-651-301 | 1941-10-01 | 1 | 345.90 KB | Terminating Marker FCG Trouble in Common Equipment - No. 1 Crossbar Offices |
| 216-653-301 | 1944-09-01 | 1 | 466.07 KB | Terminating Marker Receiving Lead Permanently Closed - Terminating Marker Connector - No. 1 Crossbar Offices |
| 216-655-301 | 1944-07-01 | 1 | 469.11 KB | Falsely Grounded Terminating Marker - RL or TRL Lead - No. 1 Crossbar Offices |
| 216-655-302 | 1965-10-01 | 1 | 320.79 KB | Crossed Contacts on Terminating Marker - OH or EH Relay - No. 1 Crossbar Offices |
| 216-657-301 | 1941-10-01 | 1 | 375.04 KB | Audible Ringing Without Ringing Subscriber - No Incoming Link Cross Point Trouble - No. 1 Crossbar Offices |
| 216-659-301 | 1942-09-01 | 2 | 948.90 KB | Falsely Grounded Incoming Trunk FC Lead - No. 1 Crossbar Offices |
| 216-661-301 | 1948-10-01 | 1 | 933.19 KB | Falsely Grounded Incoming Link Primary Hold Magnet Operating Lead in Common Equipment of an Incoming Link Frame - No. 1 Crossbar Offices |
| 216-667-301 | 1941-10-01 | 1 | 971.06 KB | Falsely Grounded Number Group RF or TF Terminal - No. 1 Crossbar Offices |
| 216-667-302 | 1941-10-01 | 1 | 918.04 KB | Crossed Number Group RF or TF Terminal - No. 1 Crossbar Offices |
| 216-667-303 | 1944-07-01 | 2 | 824.14 KB | Falsely Grounded Number Group Connector JF Lead - No. 1 Crossbar Offices |
| 216-667-304 | 1944-07-01 | 2 | 959.01 KB | Falsely Operated Number Group Connector MCB or MCC Relay - No. 1 Crossbar Offices |
| 216-667-305 | 1941-10-01 | 1 | 804.86 KB | Failure of Number Group Connector HB Relay - No. 1 Crossbar Offices |
| 216-667-306 | 1941-10-01 | 1 | 824.52 KB | Falsely Operated Number Group Connector TB Relay - No. 1 Crossbar Offices |
| 216-667-307 | 1941-10-01 | 1 | 790.08 KB | Falsely Grounded Number Group Connector C Lead - No. 1 Crossbar Offices |
| 216-667-308 | 1941-10-01 | 1 | 963.46 KB | Crossed Number Group Connector Common NS Lead and Individual NC Lead - No. 1 Crossbar Offices |
| 216-667-309 | 1944-11-01 | 1 | 957.09 KB | Crossed or Falsely Grounded Number Group Connector NS Leads - No. 1 Crossbar Offices |
| 216-667-310 | 1945-04-01 | 1 | 1.01 MB | Crossed Number Group Connector NF Leads - No. 1 Crossbar Offices |
| 216-667-311 | 1971-10-01 | 1 | 949.79 KB | Number Group Connector Block Relay Frame - Line Link Pulsing Diodes Open or Shorted - No. 1 Crossbar Offices |
| 216-669-301 | 1941-10-01 | 1 | 258.90 KB | False PBX Trunk Busy Condition - No. 1 Crossbar Offices |
| 216-671-301 | 1962-11-01 | 3 | 896.95 KB | False Routing of Calls to Intercept - No. 1 Crossbar Offices |
| 216-673-901 | 1953-07-01 | 1 | 107.68 KB | Crossed or Falsely Grounded Line Choice Connector TK Lead - No. 1 Crossbar Offices |
| 216-701-301 | 1961-02-01 | 1 | 62.40 KB | Wire Types - No. 1 Crossbar Offices |
| 216-703-301 | 1962-11-01 | 3 | 500.38 KB | Subscriber Line, Line Link and Controller and Subscriber Sender Link and Controller - Cross Connections - No. 1 Crossbar Offices |
| 216-705-301 | 1942-05-01 | 1 | 207.42 KB | Subscriber Line Overflow Register - Cross Connections - No. 1 Crossbar Offices |
| 216-705-501 | 1939-08-01 | 1 | 101.83 KB | Subscriber Line Overflow Register Circuit - Tests - No. 1 Crossbar Offices |
| 216-707-301 | 1943-10-01 | 1 | 89.42 KB | Key Pulsing Sender Link Controller and Coin Supervisory Link Controller - Cross Connections - No. 1 Crossbar Offices |
| 216-709-301 | 1939-01-01 | 1 | 145.37 KB | Originating Sender Test Frame - Cross Connections - No. 1 Crossbar Offices |
| 216-711-301 | 1972-06-01 | 7 | 5.64 MB | Originating Marker and 3-Digit Translator - Cross-Connections - No. 1 Crossbar Offices |
| 216-711-301 A | 1963-12-01 | 1 | 298.31 KB | Originating Marker and 3-Digit Translator - Cross Connections - No. 1 Crossbar Offices |
| 216-711-301PT X1 | 1972-03-01 | B | 39.42 KB | Originating Marker and 3-Digit Translator - Cross-Connections - No. 1 Crossbar Offices |
| 216-712-801 | 1962-11-01 | 3 | 358.77 KB | Cross-Connection Methods - Markers, Test Frames and Traffic Register Distributing Frames - No. 1 Crossbar Offices |
| 216-715-301 | 1968-08-01 | 4 | 285.64 KB | Terminating Sender Link and Controller SD-25028-01 and SD-25459-01 - Cross-Connections - No. 1 Crossbar Offices |
| 216-717-301 | 1956-04-01 | 3 | 1.42 MB | Terminating Marker - Cross Connections - No. 1 Crossbar Offices |
| 216-717-301 A | 1976-10-01 | 3 | 199.77 KB | Terminating Marker - Cross-Connections - No. 1 Crossbar Offices |
| 216-718-101 | 1938-04-01 | 1 | 462.26 KB | Number Group and Block Relay Frame and Line Distributing Frame - Cross Connections - No. 1 Crossbar Offices |
| 216-719-301 | 1971-12-01 | 5 | 1.64 MB | Block Relay Frame and Line Distributing Frame - Cross-Connections - No. 1 Crossbar Offices |
| 216-719-301 A | 1964-03-01 | 1-3 | 191.71 KB | Block Relay Frame and Line Distributing Frame - Cross Connections - No. 1 Crossbar Offices |
| 216-719-301 A | 1970-10-01 | 1-4 | 494.33 KB | Block Relay Frame and Line Distributing Frame - Cross-Connections - No. 1 Crossbar Offices |
| 216-719-801 | 1962-11-01 | 3 | 723.22 KB | Line Distributing Frame and Block Relay Frames - Cross Connections - No. 1 Crossbar Offices |
| 216-720-101 | 1979-12-01 | 3 | 1.66 MB | Incoming Trunk Test Frame SD-25161-01 - Description and Operation - No. 1 Crossbar Offices |
| 216-720-301 | 1976-07-01 | 9 | 1.52 MB | Incoming Trunk Test and Connector Frames SD-25161-01 - Cross-Connections - No. 1 Crossbar Offices |
| 216-720-301PT A | 1966-12-01 | B | 38.50 KB | Incoming Trunk Test and Connector Frames SD-25161-01 - Cross-Connections - No. 1 Crossbar Offices |
| 216-720-801 | 1962-12-01 | 6 | 989.93 KB | Incoming Trunk Test and Connector Frames SD-25161-01 - Cross Connections - No. 1 Crossbar Offices |
| 216-722-501 | 1965-01-01 | 6 | 554.27 KB | Dial Tone Speed Register and Dial Tone Speed Indicating Circuits - Tests - No. 1 Crossbar Offices |
| 216-730-501 | 1954-05-01 | 2 | 147.10 KB | Verification Request and Intercept Trunks - Tests Using Outgoing Trunk Test Frame SD-25177-01 - No. 1 Crossbar Offices |
| 216-732-501 | 1950-09-01 | 2 | 652.70 KB | Plugging-Up Line Circuits - Tests - No. 1 Crossbar Offices |
| 216-736-900PT | 1978-01-01 | A | 559.58 KB | Incoming Verification No-Test Trunk SD-25420-01 - Tests Using Test Set SD-25187-01 (J24751A) - No. 1 Crossbar Offices |
| 216-736-901PT | 1978-02-01 | A | 730.17 KB | Incoming Verification No-Test Trunk SD-25420-01 - Tests Using The 312A Portable Test Set - No. 1 Crossbar Offices |
| 216-742-501 | 1968-06-01 | 6 | 632.42 KB | Switchboard Cord and Operator Telephone Circuit - Tests - No. 1 Crossbar Offices |
| 216-750-501 | 1973-09-01 | 8 | 1.38 MB | Fuse Alarms - Tests - No. 1 Crossbar Offices |
| 216-751-501 | 1967-10-01 | 4 | 74.12 KB | Motor Stop Alarm - Tests - No. 1 Crossbar Offices |
| 216-752-501 | 1957-11-01 | 2 | 316.48 KB | Line Load Control - Tests - No. 1 Crossbar Offices |
| 216-753-501 | 1952-06-01 | 2 | 369.70 KB | Originating and Terminating Sender Load Control - Tests - No. 1 Crossbar Offices |
| 216-753-501 A | 1964-07-01 | 1 | 67.45 KB | Originating and Terminating Sender Load Control - Tests - No. 1 Crossbar Offices |
| 216-754-501 | 1973-03-01 | 6 | 524.06 KB | Revertive Pulse Interrupter Terminating Senders - Tests - No. 1 Crossbar Offices |
| 216-755-501 | 1951-03-01 | 1 | 562.39 KB | Simulated Heavy Traffic Load Test - No. 1 Crossbar Offices |
| 216-759-501 | 1937-09-01 | 1 | 531.77 KB | Call-Through Tests - No. 1 Crossbar Offices |
| 216-761-501 | 1953-07-01 | 1 | 412.26 KB | Ringing Interrupter and Alarm Circuit - Tests - No. 1 Crossbar Offices |
| 216-763-501 | 1978-04-01 | 7 | 728.92 KB | Plant Registers - Tests - No. 1 Crossbar Offices |
| 216-765-501 | 1978-05-01 | 11 | 2.06 MB | Traffic Registers Tests - No. 1 Crossbar Offices |
| 216-767-501 | 1954-03-01 | 1 | 181.82 KB | Subscriber Sender Supervisory Meter Circuit - Tests - No. 1 Crossbar Offices |
| 216-769-501 | 1972-06-01 | 5 | 1.38 MB | Trunk Transmission Tests - No. 1 Crossbar Offices Provided with Manual Outgoing Trunk Test Frame SD-25177-01 |
| 216-769-503 | 1981-07-01 | 1 | 645.00 KB | Trunk Transmission Tests - Circuits Terminated at Commercial ACD Using OGT Test Frame SD-25177-01 - No. 1 Crossbar Offices |
| 216-771-501 | 1978-11-01 | 7 | 960.22 KB | Alarm Sending and Transfer Circuits - Tests - No. 1 Crossbar Offices |
| 216-780-101 | 1983-12-01 | 2 | 646.26 KB | Remote Office Test Line (ROTL) SD-28607-01 - Descriptive Information - No. 1 Crossbar Offices |
| 216-781-501 | 1957-02-01 | 1 | 261.23 KB | District Junctor Test Circuit - Tests - No. 1 Crossbar Offices |
| 216-783-501 | 1975-06-01 | 3 | 506.14 KB | Originating and Auxiliary Sender and Transverter Test Frame - Tests - No. 1 Crossbar Offices |
| 216-783-501 A | 1977-04-01 | 1 | 33.63 KB | Originating and Auxiliary Sender and Transverter Test Frame - Tests - No. 1 Crossbar Offices |
| 216-784-501 | 1963-04-01 | 3 | 266.10 KB | Automatic Incoming Trunk Test Circuit SD-25161-01 - Tests - No. 1 Crossbar Offices |
| 216-786-501 | 1962-11-01 | 3 | 498.02 KB | Line Insulation Test Frame - Maintenance and Calibration Tests - No. 1 Crossbar Offices |
| 216-786-501PN X1 | 1970-05-01 | A | 186.52 KB | Line Insulation Test Frames Modified to Measure Noise on Subscriber Lines - No. 1 Crossbar Switching Systems (GA6123) |
| 216-787-501PT A | | A | 36.78 KB | Transverter Trouble Indicator - Miscellaneous Tests - No. 1 Crossbar Office |
| 216-788-501 | 1978-11-01 | 4 | 391.92 KB | Terminating Sender Test Circuit SD-25159-01 - Tests - No. 1 Crossbar Offices |
| 216-789-501 | 1976-10-01 | 6 | 224.19 KB | Originating Trouble Indicator - Tests - No. 1 Crossbar Offices |
| 216-791-501 | 1978-01-01 | 5 | 360.09 KB | Terminating Trouble Indicator - Tests - No. 1 Crossbar Offices |
| 216-800-302 | 1962-11-01 | 3 | 546.21 KB | Central Office Automatic Message Accounting Equipment - Precautions to Limit Stoppages in No. 1 Accounting Center - No. 1 Crossbar Offices |
| 216-800-303 | 1962-11-01 | 2 | 125.42 KB | Charge Irregularities on Crossbar Tandem CAMA Calls - Method of Handling Complaints and Requests - No. 1 Crossbar Offices |
| 216-800-304 | 1962-11-01 | 3 | 552.10 KB | Method of Handling Interdepartmental AMA Trouble Reports - No. 1 Crossbar Offices |
| 216-801-502 | 1977-02-01 | 4 | 772.72 KB | Transverter - Miscellaneous Tests - No. 1 Crossbar Offices |
| 216-803-501 | 1972-08-01 | 4 | 668.42 KB | Transverter Connectors SD-25804-01 - Miscellaneous Tests - No. 1 Crossbar Offices |
| 216-804-501 | 1962-03-01 | 1 | 198.35 KB | Auxiliary Transverter Link - Miscellaneous Tests - No. 1 Crossbar Offices |
| 216-805-501PT A | 1961-04-01 | A | 86.50 KB | Translators - Tests Using Sender Test Frame - No. 1 Crossbar Offices |
| 216-805-502 | 1971-03-01 | 1 | 303.74 KB | AMA Translator - Tests Using Line Verification Test Circuit SD-27154-01 - No. 1 Crossbar Offices |
| 216-807-501 | 1973-07-01 | 4 | 4.00 MB | Recorder and Recorder Connector Circuits SD-25872-01 - Tests - No. 1 Crossbar Offices |
| 216-809-501 | 1962-11-01 | 2 | 193.01 KB | Call Identity Indexer Circuit SD-25621-01 - Tests - No. 1 Crossbar Offices |
| 216-811-501 | 1972-07-01 | 3 | 142.41 KB | Call Count Process Control - Storage and Register Circuit - Tests - No. 1 Crossbar Offices |
| 216-813-301 | 1968-04-01 | 3R | 1.94 MB | Master Timing Circuit SD-25633-01 - Methods of Handling Alarms - No. 1 Crossbar Offices |
| 216-813-302 | 1962-11-01 | 2 | 895.05 KB | Master Timing Circuit SD-25633-01 - Talking [sic] Equipment Out of Service - No. 1 Crossbar Offices |
| 216-813-303 | 1962-11-01 | 2 | 155.19 KB | Master Timing Circuit SD-25633-01 - Daylight Saving Time and Leap Year Changes - No. 1 Crossbar Offices |
| 216-813-501 | 1973-09-01 | 6 | 1.79 MB | Master Timing Circuit SD-25633-01 - Tests - No. 1 Crossbar Offices |
| 216-815-501 | 1966-01-01 | 1 | 175.26 KB | ANI Outgoing Trunks - Tests Using Trunk Test Circuit SD-27587-01 - No. 1 Crossbar Offices with AMA |
| 216-816-900PT | 1976-03-01 | A | 1.25 MB | Vitel 2900B Local Message Metering System Tests - No. 1 Crossbar Offices |
| 216-816-901PT | 1979-03-01 | A | 1.03 MB | Vitel 2950 Service Observing System - Routine Maintenance Tests - No. 1 Crossbar |
| 216-901-302 | 1965-10-01 | 3R | 453.89 KB | Automatic Number Identification - Analysis of Trouble Tickets - No. 1 Crossbar Office |
| 216-903-501 | 1978-01-01 | 6 | 417.74 KB | Automatic Number Identification Trouble Ticketer Circuit - Tests Using Outpulser-Identifier Test Circuit SD-95815-01 and Automatic Trunk Test Circuit SD-95889-01 - No. 1 Crossbar Offices |
| 216-905-501 | 1965-09-01 | 3 | 506.16 KB | Automatic Number Identification Outpulser Circuit - Operation Tests - No. 1 Crossbar Offices |
| 216-905-501 A | 1966-05-01 | 1 | 195.27 KB | Automatic Number Identification Outpulser Circuit - Operation Tests - No. 1 Crossbar Offices |
| 216-905-502 | 1965-08-01 | 4 | 510.41 KB | Outpulser Circuits - Miscellaneous Tests - No. 1 Crossbar Offices Arranged for ANI-Type B |
| 216-906-501 | 1962-11-01 | 3 | 458.10 KB | Automatic Number Identification Outpulser Connector Circuit - Tests - No. 1 Crossbar Offices |
| 216-907-501 | 1965-08-01 | 3R | 452.86 KB | Automatic Number Identification Identifier Circuit - Tests - No. 1 Crossbar Offices |
| 216-908-501 | 1962-11-01 | 2 | 131.10 KB | Automatic Number Identification Oscillator Circuits - Functional Tests - No. 1 Crossbar Offices |
| 216-910-501 | 1980-06-01 | 6 | 232.05 KB | Automatic Number Identification Outgoing Trunks - Tests Using Automatic Trunk Test Circuit SD-95889-01 - No. 1 Crossbar Offices |
| 216-910-502 | 1966-12-01 | 4 | 640.35 KB | Automatic Trunk Test Circuit SD-95889-01 For Testing ANI Trunks - Miscellaneous Tests - No. 1 Crossbar Offices |
| 216-911-801 | 1975-06-01 | 7 | 5.05 MB | Number Network Frame - 313A and 313B Panels - Piece-Part Data and Replacement Procedures - No. 1 Crossbar Offices Arranged for ANI-Type B |
| 216-913-501 | 1962-11-01 | 2 | 313.62 KB | Automatic Number Identification Outpulser-Identifier Test Circuit - Miscellaneous Tests - No. 1 Crossbar Offices |