| Section
| Date
| Issue
| Size
| Title
|
| 000-000-901CA | | 1I | 5.26 MB | Numerical Index - Central Office Equipment Maintenance Practices |
| 001-510-002 | 1996-05-01 | 3 | 934.60 KB | Disposition of Assets and Materials |
| 004-007-002 | 1997-10-01 | 1 | 3.52 MB | Infrastructure Provisioning Quality Inspection Program (IPQIP) |
| 004-200-001 | 1995-07-01 | 4 | 229.55 KB | Installation Assessment Program (IAP) - Central Office Construction |
| 007-005-015 | 1991-12-01 | 6 | 508.94 KB | Handling Static-Sensitive Materials |
| 007-015-006 | 1993-02-01 | 1 | 302.50 KB | Digital Loop Carrier Provisioning |
| 007-220-001 | 1998-02-01 | 7 | 7.11 MB | COE Bar Code Methods and Procedures |
| 007-220-002 | 1998-02-01 | 5 | 4.04 MB | COE Bar Code Equipment Movement Tracking Procedures |
| 007-220-003 | 1997-05-01 | 4 | 489.26 KB | COE Bar Code Laptop Program Procedures (DOS) |
| 007-780-007 | 1999-01-01 | 5 | 121.44 KB | Central Office Equipment IP Units Process |
| 008-205-001 | 1991-01-01 | 1 | 439.07 KB | Emergency Central Office Power Down / Power Up Procedures |
| 013-000-006 | 2000-01-01 | 1 | 21.17 KB | ID Badge Policy |
| 013-000-007 | 2000-01-01 | 1 | 23.35 KB | GTE Facility Access Policy |
| 017-900-042 | 1963-08-01 | 1 | 2.79 MB | Western Electric Drawings - Symbols |
| 032-000-000 | 1969-02-01 | 2 | 131.13 KB | Numerical Index - Division 032 - Miscellaneous Equipment (Capacitors, Connectors, Jacks, Keys, Lamps, Cords, Etc.) |
| 032-201-103 | 1972-12-01 | 2 | 650.65 KB | WECo, GTE and Other Manufacturers - Two Conductor Cord Assemblies - Description |
| 032-201-105 | 1972-12-01 | 2 | 430.74 KB | WECo, GTE and Other Manufacturers - Four and Five Conductor Cord Assemblies - Description |
| 032-210-106 | 1971-06-01 | 1 | 1.14 MB | Cord Assemblies - GTE Automatic-Electric - Six Conductors - Description |
| 032-210-108 | 1972-03-01 | 1 | 4.25 MB | GTE Automatic Electric - Cord Assemblies - Eight or More Conductors - Description |
| 032-210-150 | 1977-01-01 | 7 | 2.01 MB | GTE Lenkurt Test Cord, Plug and Adapter Assemblies |
| 032-301-101 | 1965-02-01 | 1 | 580.50 KB | Plugs for Telephone Service - General - Descripition |
| 032-320-702 | 1967-11-01 | 1 | 336.37 KB | Test Jack Assemblies and Navy Type Shelf Jacks - Adjustment |
| 075-170-100 | 1989-09-01 | 5 | 163.97 KB | Cable and Support Ties - Description and Use |
| 075-630-101 | 1973-04-01 | 3 | 169.90 KB | Wire Wrapping Tools - Description and Use |
| 075-630-101 A | 1976-06-01 | 2 | 15.93 KB | Wire Wrapping Tools - Description and Use |
| 075-630-801 | 1991-10-01 | 6 | 137.19 KB | Wire Wrapping Bits Testing |
| 100-000-100 | 1991-04-01 | 2 | 121.43 KB | Test Equipment Calibration Guidelines |
| 100-201-100 | 1975-02-01 | 3 | 914.83 KB | Type 800 Hand Test Telephone |
| 100-203-100 | 1977-07-01 | 3 | 1.48 MB | Type 801 Hand Test Telephone - Description |
| 100-203-100 A | 1978-01-01 | 1 | 100.07 KB | Type 801 Hand Test Telephone - Description |
| 117-200-005 | 1991-06-01 | 2 | 476.86 KB | Safety Hats - Description, Use, and Maintenance |
| 117-200-006 | 1995-02-01 | 2 | 235.65 KB | Asbestos Work Procedures |
| 117-300-002 | 1993-04-01 | 2 | 134.01 KB | First Aid Kit - Description, Placement, and Inspection |
| 117-300-002 X1 | 1993-05-01 | 2 | 83.53 KB | First Aid Kit - Description, Placement, and Inspection - Northwest Region |
| 117-400-001 | 1997-11-01 | 3 | 591.56 KB | Hearing Protection Program |
| 117-400-002 | 1993-08-01 | 2 | 138.67 KB | Smoke-Free Policy |
| 117-400-004 | 1992-12-01 | 1 | 359.20 KB | Eye Protection - Description and Use |
| 122-000-001 | 1991-03-01 | 1 | 243.80 KB | Audit Procedures for Hazadous Materials Contractors |
| 122-009-001 | 1992-09-01 | 1 | 178.13 KB | Used Solvent Disposal |
| 122-205-001 | 1990-12-01 | 1 | 440.10 KB | Battery Removal and Disposal |
| 122-205-002 | 1993-01-01 | 1 | 282.71 KB | Lead-Acid Batteries - Spills and First Aid Procedures |
| 122-205-003 | 1991-03-01 | 1 | 1.26 MB | PCBs - Disposal of Capacitors and Light Ballasts |
| 122-205-004 | 1992-07-01 | 2 | 159.97 KB | PCBs - Emergency Procedures |
| 200-000-007 | 1992-02-01 | 1 | 161.66 KB | Minimum Alarm Configuration - New Switching Equipment |
| 200-001-000 | 1992-12-01 | 8 | 2.84 MB | Safety Precautions - Central Office |
| 200-001-004 | 1990-04-01 | 5 | 88.66 KB | Equipment Rooms - Housekeeping |
| 200-001-004 A | 1990-12-01 | 1 | 23.27 KB | Equipment Rooms - Housekeeping |
| 200-001-010 | 1993-12-01 | 6 | 134.60 KB | Electrical Tools and Test Equipment in Electronic / Digital Equipment Areas |
| 200-002-010 | 1995-07-01 | 4 | 333.71 KB | Test and Verification During Installation - General Plan |
| 200-002-700 | 1995-07-01 | 8 | 603.93 KB | COE Construction - Equipment Check / Verification and General Feature and Functional Acceptance - Test Forms |
| 200-002-724 | 1990-12-01 | 2 | 4.50 MB | Acceptance Test Procedures - GTD-5 EAX |
| 200-002-725 | 1990-10-01 | 1 | 582.53 KB | Acceptance Testing - DS-1 Span |
| 200-002-726 | 1995-11-01 | 1 | 429.93 KB | Switched 64 Clear Channel Call-Through Functional Tests |
| 200-002-730 | 1974-09-01 | 1 | 195.67 KB | Carrier Equipment - Acceptance Test Plan |
| 200-002-731 | 1974-09-01 | 1 | 260.80 KB | Radio Equipment - Acceptance Test Plan |
| 200-004-701 | 1994-01-01 | 2 | 149.05 KB | Acceptance Test - NTI / DMS |
| 200-050-101 | 1995-12-01 | 5 | 260.21 KB | Special Service Circuits - Safeguarding and Marking |
| 200-050-203 | 1976-04-01 | 2 | 29.31 KB | Central Office Equipment - Painting and Cleaning |
| 200-075-101 | 1975-02-01 | 1 | 48.11 KB | Storage Cabinet EC-21212 for Printed Wiring Card Assemblies |
| 200-910-200 | 1983-06-01 | 2 | 204.95 KB | Printed Circuit Cards - Maintenance and Modifications |
| 200-910-200 A | 1983-07-01 | 1 | 19.48 KB | Printed Circuit Cards - Maintenance and Modifications |
| 205-000-000 | 1984-01-01 | 1 | 80.76 KB | Equipment Alarms Overview |
| 205-000-003 | 1984-01-01 | 1 | 249.59 KB | Alarms for Toll Switching Equipment |
| 205-000-004 | 1984-01-01 | 1 | 171.61 KB | Alarms for Carrier and Radio Facilities |
| 205-000-005 | 1984-01-01 | 1 | 85.55 KB | Alarms for Switching Equipment Support Systems |
| 205-000-006 | 1984-01-01 | 1 | 95.18 KB | Alarms for Peripheral Equipment |
| 205-000-500 | 1989-08-01 | 6 | 189.30 KB | Power Connections - Central Office Fuse Inspection and Tightening Procedures |
| 205-001-501 | 1991-11-01 | 4R | 93.40 KB | Equipment Frames Preliminary Test and Power-Up Procedures |
| 205-001-502 | 1998-05-01 | 2 | 2.72 MB | Central Office Power Evaluation (COPE) |
| 205-002-501 | 1994-10-01 | 1 | 197.77 KB | Isolated Ground Faults - Detection and Troubleshooting - Switching and Transmission Systems |
| 205-005-040 | 1983-12-01 | 4 | 156.07 KB | Central Office and PABX Lead-Acid Batteries - General Information |
| 205-005-040 A | 1984-09-01 | 1 | 7.89 KB | Central Office and PABX Lead-Acid Batteries - General Information |
| 205-005-100 | 1992-04-01 | 5 | 786.17 KB | Battery Maintenance Safety Board - Central Office Equipment |
| 205-005-101 | 1991-01-01 | 1 | 234.54 KB | Emergency Eyewash / Chemical Burn Station - Description |
| 205-005-200 | 1997-06-01 | 8 | 1.22 MB | Batteries - Central Office and Remote Installation and Maintenance |
| 205-005-201 | 1974-09-01 | 1 | 177.32 KB | Floor-Mounted Storage Battery Cells - Enclosed Type - Installation |
| 205-005-201 A | 1986-02-01 | 2 | 11.44 KB | Floor-Mounted Storage Battery Cells - Enclosed Type - Installation |
| 205-010-501 | 1963-03-01 | 1 | 66.54 KB | Telephone Storage Batteries - Discharge Tests for Ampere-Hour Capacity |
| 205-010-502 | 1973-12-01 | 3 | 217.15 KB | Central Office and PABX Batteries - Method of Determining Reserve Capacity |
| 205-010-701 | 1966-11-01 | 2 | 63.73 KB | Central Office and PABX Lead-Acid Batteries - Single Cell Charging - Constsant Current Method |
| 205-100-200 | 1996-08-01 | 6 | 399.21 KB | Battery Charger Installation |
| 205-605-501 | 1991-12-01 | 2 | 458.43 KB | Alarms, Audible and Visual (Excluding SATT Alarms) - Testing Procedures |
| 205-605-502 | 1990-11-01 | 4 | 82.17 KB | Audible and Visual Power Equipment Alarms - Test Procedures |
| 205-605-503 | 1996-05-01 | 5 | 344.97 KB | Central Office Alarms - Functional Testing Requirements |
| 205-705-201 | 1990-12-01 | 8 | 199.28 KB | Power Plant Bus Bar Installation |
| 205-705-202 | 1975-12-01 | 1 | 899.46 KB | DC Bus Duct - Description and Installation |
| 209-331-000 | 1996-12-01 | 3 | 460.12 KB | Automatic Message Accounting - Verification Test Procedures |
| 211-331-000 | 1990-03-01 | 1 | 1.52 MB | Centralized Automatic Reporting on Trunks / Remote Automatic Measuring of Performance and Reporting on Trunks (CAROT / RAMPART) - General Administration |
| 220-000-001 | 2003-02-01 | 1 | 162.30 KB | Verizon Safe Time Window Practice |
| 220-000-002 | 1991-08-01 | 1 | 330.44 KB | SPC Daily Journal |
| 220-000-200 | 1994-12-01 | 3 | 366.99 KB | Equipment Removal Guidelines - COE |
| 220-001-001 | 1988-11-01 | 4 | 499.67 KB | Central Office Equipment - Installation Activity Procedures |
| 220-001-002 | 1993-09-01 | 2 | 291.99 KB | High Risk Activity Notice |
| 220-001-003 | 1990-09-01 | 1 | 538.35 KB | Prefielding - COE Construction |
| 220-001-004 | 1995-07-01 | 3 | 757.23 KB | COE Construction - Planning and Work Order Implementation Requirements |
| 220-001-005 | 1995-07-01 | 2 | 778.32 KB | COE Construction - Demarcation Activities |
| 220-001-006 | 1996-01-01 | 1 | 177.61 KB | Central Office Equipment Construction - Conversion / Cutover Procedures |
| 220-014-007 | 1991-09-01 | 3 | 1.32 MB | Quiescent Test Load Simulator (TLS) - Test Criteria |
| 220-100-300 | 1999-10-01 | 1 | 152.29 KB | Network Maintenance Window |
| 220-220-501 | 1991-05-01 | 1 | 241.43 KB | Printed Wiring Card Test Procedures - Spare and Returned From Repair |
| 220-227-001 | 1996-08-01 | 1 | 1.45 MB | Stored Program Control (SPC) Switch Port Applications |
| 220-227-500 | 1996-09-01 | 2 | 284.21 KB | Switching Systems Network Elements - Backup Tape Guidelines |
| 224-000-802 | 1991-04-01 | 1 | 3.25 MB | GTD-5 EAX - Solid State Line Cards - Handling, Testing, Grounding, and Maintenance Proceudres |
| 224-100-100 | 1994-08-01 | 7 | 614.76 KB | GTD-5 EAX - Power and Alarm Equipment |
| 237-050-201 | 1988-11-01 | 3 | 392.57 KB | Erection Methods - Central Office - Laying Out the Floor |
| 237-050-204 | 1989-09-01 | 5 | 1.15 MB | Central Office - Erection Methods |
| 237-050-204 A | 1989-10-01 | 1 | 8.08 KB | Central Office - Erection Methods |
| 237-050-206 | 1992-01-01 | 5 | 188.21 KB | Central Office Cable Runway - Erectio Methods |
| 237-050-207 | 1988-11-01 | 3 | 181.44 KB | Erection Methods - Central Office - Cable Grid |
| 237-200-202 | 1981-09-01 | 5 | 410.32 KB | Rolling Ladder Track and Rolling Ladders - Installation |
| 237-200-202 A | 1992-07-01 | 2 | 11.26 KB | Rolling Ladder Track and Rolling Ladders - Installation |
| 237-200-202 A | 1992-11-01 | 3 | 9.68 KB | Rolling Ladder Track and Rolling Ladders - Installation |
| 237-200-203 | 1967-01-01 | 1 | 63.58 KB | Rolling Ladders Equipped with W.E.Co. Type Brakes |
| 237-200-204 | 1971-04-01 | 1 | 108.29 KB | Ladder, Rolling - Lubrication and Inspection |
| 237-224-214 | 1989-07-01 | 2 | 234.98 KB | GTD-5 EAX - Engineering and Installation - Ground Isolation |
| 243-120-200 | 1990-06-01 | 5 | 1.32 MB | Cook Electric Protectors - Description and Installation |
| 244-010-202 | 1990-11-01 | 4 | 749.63 KB | Numbering and Lettering - Central Office Equipment - Distributing Frames |
| 244-200-100 | 1991-01-01 | 3 | 481.32 KB | Numbering and Lettering - Switching Equipmet |
| 244-200-102 | 1996-04-01 | 2 | 75.87 KB | Central Office Patch Cord Tag Instructions |
| 244-251-200 | 1990-11-01 | 5 | 412.51 KB | Numbering and Lettering - Power and Lighting |
| 244-251-200 A | 1994-08-01 | 1 | 10.00 KB | Numbering and Lettering - Power and Lighting |
| 244-261-100 | 1990-11-01 | 3 | 516.41 KB | Numbering and Lettering - Transmission Equipment |
| 256-010-201 | 1969-10-01 | 3 | 317.36 KB | Cabling Methods - Soldering |
| 256-010-201 A | 1974-03-01 | 2 | 10.07 KB | Cabling Methods - Soldering |
| 256-050-203 | 1994-01-01 | 8 | 534.09 KB | Cabling Methods - Installation Planning and Safeguards |
| 256-050-204 | 1972-05-01 | 3 | 1.08 MB | Cabling Methods - Central Office - Securing Switchboard Cable |
| 256-050-204 | 1991-12-01 | 6 | 560.11 KB | Cabling Methods - Running and Securing Switchboard Cable |
| 256-050-205 | 1993-12-01 | 5 | 93.39 KB | Cabling Methods - Butting, Stripping, and Fanning - Switchboard Cables |
| 256-050-205 A | 1994-09-01 | 1 | 16.48 KB | Cabling Methods - Butting, Stripping, and Fanning - Switchboard Cables |
| 256-050-206 | 1991-04-01 | 5 | 228.13 KB | Cabling Methods - Running and Securing Power Cable |
| 256-050-206 A | 1994-08-01 | 1 | 16.94 KB | Cabling Methods - Running and Securing Power Cable |
| 256-050-206 A | 1996-10-01 | 2 | 11.94 KB | Cabling Methods - Running and Securing Power Cable |
| 256-050-207 | 1994-03-01 | 5 | 3.21 MB | Terminating Power Cable Using Compression Connectors and Lugs |
| 256-050-207 A | 1995-12-01 | 4 | 214.50 KB | Terminating Power Cable Using Compression Connectors and Lugs |
| 256-050-208 | 1972-05-01 | 4 | 157.85 KB | Cabling Methods - Connecting Switchboard Cable (Wrap and Solder Methods) |
| 256-050-209 | 1990-03-01 | 6 | 56.20 KB | Cable Buzzing Methods |
| 256-050-211 | 1991-07-01 | 3R | 256.30 KB | Cabling Methods - Connecting Wires (Solderless Wrap Methods) |
| 256-050-214 | 1970-08-01 | 1 | 323.10 KB | Cabling Methods - Central Office - Splicing Switchboard Cable Using AMP Model VS-3 Tool |
| 256-050-216 | 1989-10-01 | 1 | 503.69 KB | Cabling Methods - Shielded and Coaxial Cables |
| 256-150-200 | 1967-07-01 | 2 | 6.02 MB | Procedures for Cross-Connecting (Jumpering) - Central Office Distributing Frames |
| 256-150-200 | 1989-06-01 | 3 | 6.57 MB | Procedures for Cross-Connecting (Jumpering) - Central Office Distributing Frames - Description |
| 256-150-200 A | 1972-01-01 | 1 | 64.75 KB | Procedures for Cross-Connecting (Jumpering) - Central Office Distributing Frames |
| 256-150-201 | 1990-11-01 | 5 | 605.49 KB | Cabling Methods - Distributing Frames |
| 256-150-202 | 1984-09-01 | 1 | 76.20 KB | Procedure for Splicing - Cross Connections - Distributing Frames |
| 256-152-200 | 1972-12-01 | 2 | 432.40 KB | Procedures for Cross-Connecting (Jumpering) - Quick-Connect Distributing Frames |
| 256-224-216 | 1991-11-01 | 4 | 433.75 KB | GTD-5 EAX - Cabling Methods |
| 256-351-200 | 1971-03-01 | 1 | 335.27 KB | Cabling Methods - Central Office - Relay Rack Equipment |
| 256-351-200 A | 1981-09-01 | 1 | 11.75 KB | Cabling Methods - Central Office - Relay Rack Equipment |
| 256-600-201 | 1993-06-01 | 2 | 117.42 KB | Cabling Methods - Forming and Dressing - Miscellaneous Wire |
| 274-100-700 | 1989-10-01 | 1 | 756.84 KB | Stromberg-Carlson DCO Acceptance Test Plan |
| 277-301-302 | 1966-11-01 | 1 | 4.75 MB | A.E.Co. Type 301 PABX Attendant's Position - Maintenance |
| 291-100-000 | 2003-02-01 | 5 | 560.26 KB | Battery Standards - Flooded Central Office Power Systems |
| 300-392-200 | 2000-05-01 | 3 | 90.74 KB | Network Provisioning Process Collocation |
| 331-220-510 | 1993-10-01 | 6 | 669.16 KB | Transmission Testing - 1004 Hertz and Gain-Slope AML Tests - Direct, Tandem-Connecting, and Intertandem Trunks |
| 331-310-510 | 1996-12-01 | 6 | 294.98 KB | Message Noise Measurement - Battery Supply Circuits in Central Offices |
| 331-365-510 | 1990-08-01 | 5 | 500.97 KB | Transmission Testing - Impulse Noise Measurements |
| 343-200-001 | 1991-04-01 | 1 | 396.16 KB | Operational Overview and Departmental Responsibilities for a Digital Switch Corporation DEX ECS1L |
| 392-342-500 | 1990-04-01 | 1 | 216.11 KB | Fiber Optics Acceptance Test Procedures |
| 440-000-010 | 1991-01-01 | 1 | 941.15 KB | CNAS Assignment of Remote Test System Access Points |
| 471-100-040 | 1968-01-01 | 1 | 603.29 KB | Line Leakage and Ringing Bridge Limitations |
| 471-150-200 | 1963-06-01 | 3 | 257.33 KB | Installation - Radio Frequency Demodulation Suppressors |
| 471-151-040 | 1967-09-01 | 1 | 2.22 MB | Electron Ringing Tubes - Application |
| 471-151-200 | 1966-10-01 | 3 | 453.43 KB | Orbit TDD-3A1 Ringer Isolation Relay - Installation |
| 471-152-200 | 1979-03-01 | 4 | 543.22 KB | Model 438L1 Ringer Isolator |
| 473-002-800 | 1970-04-01 | 2 | 760.66 KB | Telephone Sets - Modification for Second Party SATT Detection - Resistive Ground Method |
| 473-002-800 A | 1980-08-01 | 1 | 337.21 KB | Telephone Sets - Modification for Second Party SATT Detection - Resistive Ground Method |
| 473-002-801 | 1981-02-01 | 4 | 447.38 KB | SATT Detection of Second Party - Inductor Ground and Ringer Tap Methods |
| 473-010-200 | 1969-11-01 | 2 | 1.15 MB | Auxiliary Headset for Use With Handset Telephone Instrument - Installation |
| 473-211-800 | 1967-04-01 | 1 | 189.91 KB | Leich 100-Series Telephone Set - Modification for Use in 10A1, 10A2 and 16A Key Telephone Systems |
| 473-215-200 A | 1968-02-01 | 2 | 501.87 KB | Installation and Field Maintenance - A.E.Co. Type 80 Telephone |
| 473-215-202 | 1981-08-01 | 6 | 5.14 MB | Type 80E Telephone Set - Rotary Dial Version |
| 473-215-202 A | 1982-05-01 | 1 | 96.60 KB | Type 80E Telephone Set - Rotary Dial Version |
| 473-215-205 | 1977-08-01 | 2 | 677.01 KB | Type 80E Telephone Set - Four-Wire and Supervised-Line Service Versions |
| 473-220-112 | 1981-08-01 | 1 | 3.47 MB | Type 192B Telephone - Description and Installation |
| 473-220-112 A | 1982-05-01 | 1 | 101.05 KB | Type 192B Telephone - Description and Installation |
| 473-301-200 | 1981-04-01 | 2 | 3.90 MB | Type 183 Telephone Set - Installation and Field Maintenance |
| 473-301-800 | 1981-03-01 | 2 | 293.30 KB | Type 183 Telephone Set - Modification for Use in Type 10A1, 10A2, and 16A Key Telephone Systems |
| 473-302-200 | 1967-04-01 | 1 | 2.74 MB | A.E.Co. Type 83 Telephone - Installation and Field Maintenance |
| 473-302-800 | 1967-04-01 | 2 | 122.40 KB | A.E.Co. Type 83 Telephone Set - Modification for Use in 10A1, 10A2 and 16A Key Telephone Systems |
| 473-402-200 | 1963-04-01 | 1 | 1.45 MB | Installation and Field Maintenance - Type 88AT Speakerphone Adapter |
| 473-404-100 | 1970-11-01 | 2 | 13.81 MB | Telephone Set - AECo Type 95 Panel - Description |
| 473-406-210 | 1975-01-01 | 2 | 7.52 MB | 608CW and 618BW Telephone Sets |
| 473-410-200 | 1966-06-01 | 2 | 855.24 KB | A.E.Co. Type 880 Spearkerphone - Installation and Field Maintenance |
| 473-410-200 A | 1965-05-01 | 1 | 85.78 KB | Installation - A.E.Co. Type 880 Speakerphone |
| 473-410-201 | 1972-05-01 | 2 | 1.88 MB | GTE Automatic Electric Type 880B Speakerphone Telephone Set with Touch Calling - Installation and Field Maintenance |
| 473-414-200 | 1968-03-01 | 1 | 2.61 MB | Leich 900-Series Magneto Telephone Set - Description and Installation |
| 473-417-200 | 1967-12-01 | 1 | 3.44 MB | Lordel LM-625 Specialty Telephone Set Kit - Installation and Maintenance |
| 473-417-200 A | 1968-06-01 | 1 | 319.89 KB | Lordel LM-625 Specialty Telephone Set Kit - Installation and Maintenance |
| 473-422-200 | 1972-09-01 | 3 | 12.18 MB | GTE Automatic Electric Type 980 STYLELINE Rotary Dial Telephone Set - Description, Installation and Maintenance |
| 473-425-200 | 1972-07-01 | 2 | 499.22 KB | American Telecommunications Corporation Specialty Model Telephone Sets - Description, Installation and Field Maintenance |
| 473-425-200 | 1977-03-01 | 3 | 1.48 MB | Specialty Model Telephone Sets - Description, Installation and Field Maintenance |
| 473-425-201 A | 1972-11-01 | 1 | 108.43 KB | American Telecommunication Corporation Kit for Custom Telephone - Installation and Maintenance |
| 473-501-200 | 1967-09-01 | 2 | 9.69 MB | A.E.Co. Type 87A Telephone Set - Description and Installation |
| 473-501-800 | 1967-02-01 | 1 | 913.87 KB | A.E.Co. Type 87A Telephone Set - Modification to Add N.E.Co. QBX1A Buzzer |
| 473-501-801 | 1972-06-01 | 2 | 1.30 MB | GTE Automatic Electric Type 87A Telephone Set - Modification to Add Auxiliary Buzzer |
| 473-502-100 | 1969-07-01 | 1 | 1.29 MB | A.E.Co. Type 85 Telephone - Description and Operation |
| 473-502-800 | 1967-04-01 | 1 | 224.57 KB | A.E.Co. Type 85A Telephone Set - Modification for Use in 10A1, 10A2 and 16A Key Telephone Systems |
| 473-502-800 A | 1968-12-01 | 1 | 818.75 KB | A.E.Co. Type 85A Telephone Set - Modification for Use in 10A1, 10A2 and 16A Key Telephone Systems |
| 473-503-200 | 1965-08-01 | 1 | 12.26 MB | Installation - Set, Telephone, A.E.Co. Type 86 |
| 473-506-200 | 1966-05-01 | 1 | 8.07 MB | A.E.Co. Type 860A CALL COMMANDER Key Telephone - Description and Installation |
| 473-506-201 | 1969-07-01 | 1 | 12.09 MB | A.E.Co. Type 860B Key Telephone - Description and Installation |
| 473-512-100 | 1968-01-01 | 1 | 4.32 MB | A.E.Co. Type 186 Telephone Set - Description |
| 473-513-100 | 1971-05-01 | 2 | 7.07 MB | Telephone Set - GTE Automatic Electric Type 187 - Description |
| 473-513-100 | 1974-01-01 | 3 | 13.85 MB | Type 187 Telephone Set - Description, Installation, and Field Maintenance |
| 473-801-200 | 1963-05-01 | 1 | 1.51 MB | Installation - A.E.Co. Types 84 and 840 Handsets |
| 473-802-300 | 1979-03-01 | 4 | 3.06 MB | Standard Handsets - Description and Field Maintenance |
| 473-810-200 | 1972-07-01 | 3 | 2.43 MB | GTE Automatic Electric Type 33 Ringer Unit - Installation |
| 473-810-201 | 1979-11-01 | 1 | 949.13 KB | Type 33 Ringer Box - Installation |
| 473-813-200 | 1965-02-01 | 1 | 2.21 MB | Description and Installation - Bell, Loud Extension |
| 473-820-100 | 1973-12-01 | 3 | 1.20 MB | Dials, Fingerwheels, and Number Cards - Description |
| 473-820-200 | 1969-10-01 | 3 | 2.93 MB | Telephone Set Dial Fingerwheels - Removal and Installation |
| 473-820-200 A | 1973-04-01 | 1 | 38.22 KB | Telephone Set Dial Fingerwheels - Removal and Installation |
| 473-821-400 | 1978-01-01 | 4 | 911.90 KB | Auxiliary Touch Calling Adapter - Connections |
| 473-822-700 | 1969-02-01 | 2 | 672.66 KB | Adjustment - A.E.Co. Dial Speed |
| 473-822-700 A | 1970-02-01 | 1 | 33.48 KB | Adjustment - AECo Dial Speed |
| 476-000-000 | 1967-06-01 | | 331.03 KB | Numerical Index - Division 476 - Coin Telephone Sets and Associated Apparatus |
| 476-000-000 | 1965-03-01 | 4 | 34.98 KB | Numerical Index - Division 476 - Paystations |
| 476-002-200 | 1975-07-01 | 1 | 140.22 KB | Coin Telephone - Coin Level Volume Sensor |
| 476-101-100 | 1975-11-01 | 1 | 240.48 KB | Testing Coin Relays Using Model TS-501T Test Set |
| 476-200-200 | 1963-04-01 | 1 | 924.87 KB | Installation - A.E.Co. Paystations |
| 476-200-200 A | 1963-06-01 | 1 | 33.59 KB | Installation - A.E.Co. Paystations |
| 476-201-100 | 1978-08-01 | 5 | 6.27 MB | Type 120A Single-Slot Coin Telephone Set - Description and Installation |
| 476-201-100 A | 1979-03-01 | 1 | 18.36 KB | Type 120A Single-Slot Coin Telephone Set - Description and Installation |
| 476-201-100 A | 1980-11-01 | 3 | 111.99 KB | Type 120A Single-Slot Coin Telephone Set - Description and Installation |
| 476-201-101 A | 1982-08-01 | 2 | 388.83 KB | Type 120B (Single-Slot) Coin Telephone Set - Description and Installation |
| 476-202-100 | 1963-02-01 | 1 | 427.76 KB | Description - A.E.Co. Prepay Paystations |
| 476-202-101 | 1969-01-01 | 2 | 764.10 KB | A.E.Co. Prepay Coin Telephone Sets Equipped with Single-Coil Coin Relay - Description |
| 476-202-120 | 1967-05-01 | 1 | 614.49 KB | N.E.Co. Single-Coil Coin Relay - Description |
| 476-202-200 | 1969-07-01 | 1 | 129.49 KB | A.E.Co. 3-Gauge Coin Telephone Set - Installation |
| 476-202-400 | 1969-11-01 | 1 | 41.56 KB | A.E.Co. 92-N and 92-W Prepay Coin Telephone Sets - Connections |
| 476-202-401 | 1969-11-01 | 1 | 103.72 KB | A.E.Co. LPA82-Series Prepay Coin Telephone Sets - Connections |
| 476-202-402 | 1969-11-01 | 1 | 41.33 KB | A.E.Co. LPA92-Series Prepay Coin Telephone Sets - Connections |
| 476-202-403 | 1968-11-01 | 1 | 1.65 MB | A.E.Co. LPB82-Series Prepay Coin Telephone Sets - Connections |
| 476-202-403 A | 1969-04-01 | 1 | 38.94 KB | A.E.Co. LPB82-Series Prepay Coin Telephone Sets - Connections |
| 476-202-404 | 1968-08-01 | 1 | 92.29 KB | A.E.Co. LPC82-Series Prepay Coin Telephone Sets - Connections |
| 476-202-405 | 1977-05-01 | 2 | 106.05 KB | LPC72-Series Coin Telephone Sets - Connections |
| 476-202-520 | 1967-10-01 | 1 | 618.44 KB | N.E.Co. Single-Coil Coin Relay - Maintenance |
| 476-202-520 A | 1968-01-01 | 1 | 43.83 KB | N.E.Co. Single-Coil Coin Relay - Maintenance |
| 476-202-700 | 1970-08-01 | 1 | 370.38 KB | Coin Telephone Set - AECo Prepay - Maintenance |
| 476-203-100 | 1969-06-01 | 2 | 1.32 MB | A.E.Co. Semi-Postpay Coin Telephone Sets - Description |
| 476-203-200 | 1969-07-01 | 1 | 316.67 KB | A.E.Co. Semi-Postpay Coin Telephone Sets - Installation |
| 476-204-404 | 1968-12-01 | 1 | 126.20 KB | A.E.Co. LPC89-Series Coin Telephone Sets - Connections |
| 476-209-100 | 1974-07-01 | 1 | 3.35 MB | Multislot Coin Telephone Set Totalizer - Description, Operation, Installation, and Installation Tests |
| 476-507-200 | 1964-08-01 | 1 | 517.79 KB | Installation - Booth, Portable Shelfette |
| 476-509-200 | 1972-07-01 | 2 | 72.33 KB | Gladwin Industries GP4402 Pearl Booth - Installation |
| 478-100-200 | 1966-04-01 | 1 | 894.01 KB | Installation, Operation, and Field Maintenance - Electronic Secretary Model SP-2 |
| 478-120-200 | 1967-08-01 | 3 | 4.06 MB | Electronic Secretary Model AO-3 - Installation and Field Maintenance |
| 478-130-200 | 1966-05-01 | 1 | 4.50 MB | Electronic Secretary Model LP-TD-C - Installation and Field Maintenance |
| 478-131-200 | 1968-07-01 | 1 | 8.35 MB | Electronic Secretary Model RFP - Installation and Field Maintenance |
| 478-202-100 | 1978-07-01 | 4 | 3.38 MB | E-2 Magicall Automatic Dialer |
| 478-202-100 A | 1980-02-01 | 1 | 21.35 KB | E-2 Magicall Automatic Dialer |
| 478-428-110 | 1982-10-01 | 1 | 596.34 KB | PC-50B Conference Set |
| 484-400-400 | 1963-09-01 | 2 | 1.18 MB | Circuit Description - Type 10A1 Key Telephone Systems |
| 489-600-200 | 1962-09-01 | 1 | 6.10 MB | Installation - 86A Key Telephone Adapter |
| 489-606-200 | 1967-01-01 | 1 | 2.30 MB | A.E.Co. MC-8885-A Three-Line Lever Key - Description and Installation |
| 489-650-100 | 1966-06-01 | 1 | 13.15 MB | A.E.Co. Types 2A, 2B, and 2C Secretarial Answering Cabinet - Description |
| 489-650-200 | 1969-03-01 | 2 | 8.70 MB | A.E.Co. Type 2 Secretarial Answering Cabinet - Installation |
| 489-650-200 A | 1972-01-01 | 2 | 556.84 KB | A.E.Co. Type 2 Secretarial Answering Cabinet - Installation |
| 489-652-110 | 1976-10-01 | 1 | 6.89 MB | Secretarial Answering Cabinets |
| 491-300-110 | 1980-12-01 | 2 | 1.43 MB | Miniature Bridged Jacks - Phases 1 Through 6 - Description |
| 491-300-200 | 1974-10-01 | 2 | 414.13 KB | Portable Telephone Plugs and Jacks - Description and Installation |
| 491-500-100 | 1974-10-01 | 2 | 1.46 MB | Telephone and Outlet Connecting Blocks |
| 503-400-100 | 1971-04-01 | 2 | 26.41 MB | Leich PBX L55 - Description |
| 503-400-200 | 1963-08-01 | 1 | 4.99 MB | Installation - Leich L55 PBX |
| 503-400-403 | 1967-10-01 | 1 | 1.98 MB | Leich L55 PBX - Wiring Diagrams - Optional Circuits |
| 503-400-500 | 1963-08-01 | 1 | 5.26 MB | Installation Tests - Leich L55 PBX |
| 503-400-700 | 1963-08-01 | 1 | 4.42 MB | Adjustments - Leich L55 PBX |
| 503-620-400 | 1965-12-01 | 1 | 1.45 MB | Description, Circuits - 555 PBX Switchboard |
| 632-100-217 | 1991-06-01 | 3 | 1.51 MB | Cable Splicing - 3M Modular Splicing System |
| 740-200-070 | 1992-11-01 | 2 | 478.74 KB | Building Alarms - Engineering Applications |
| 741-200-500 | 1997-02-01 | 3 | 688.33 KB | Building Alarms - Functional Tests |
| 742-100-100 | 1996-03-01 | 6 | 588.06 KB | Fire Prevention and Protection |
| 742-200-070 | 1998-03-01 | 2 | 2.41 MB | Sealing Cable Openings and Penetrations - Fire Protection Measures |
| 742-205-070 | 1990-10-01 | 5 | 79.97 KB | Battery Room or Area Ventilation - Engineering Application |
| 742-205-070 A | 1996-04-01 | 1 | 11.17 KB | Battery Room or Area Ventilation - Engineering Application |
| 780-740-070 | 1990-02-01 | 4 | 1.13 MB | Central Office Equipment - Earthquake Bracing - Engineering and Installation - Application |
| 788-405-075 | 1990-08-01 | 5 | 235.08 KB | Order and Application of Central Office Equipment Lighting Fixtures |
| 795-001-070 | 1989-07-01 | 5 | 1.36 MB | Central Office Equipment - Switching Systems - Power Cabling and Fusing - Engineering Applications |
| 795-155-075 | 1966-09-01 | 1 | 189.89 KB | Standard Bus Bar Bolting Arrangements - Engineering Considerations |
| 795-205-077 | 1994-11-01 | 1 | 893.79 KB | Power System Monitor / Controller (PSMC) - AT&T ECS-6U - Engineering and Installation |
| 795-805-071 | 1994-03-01 | 9 | 2.17 MB | Central Office Grounding Systems - Engineering Applications |
| 795-805-072 | 1995-01-01 | 6 | 1.14 MB | AC Service Grounding - Engineering Applications |
| 795-805-072 A | 1995-06-01 | 1 | 13.97 KB | AC Service Grounding - Engineering Applications |
| 795-805-073 | 1998-11-01 | 7 | 6.15 MB | Central Office Grounding Transmission Equipment |
| 795-805-074 | 1989-11-01 | 4 | 833.29 KB | Inspecting Central Office Grounding and Electrical Protection |
| 795-805-075 | 1995-04-01 | 3 | 1.44 MB | Remote Electronic Serving Area Grounding Systems - Engineering Considerations |
| 795-805-076 | 1996-09-01 | 4 | 396.94 KB | NORTEL Digital Multiple System (DMS) - Switching Systems Grounding - Engineering Applications |
| 795-805-077 | 1991-05-01 | 1 | 183.43 KB | Stromberg-Carlson DCO Switching System - Grounding - Engineering Applications |
| 795-805-078 | 1996-06-01 | 4 | 261.97 KB | Engineering Guidelines for Grounding Lucent Technologies Switching Equipment in GTE Facilities |
| 795-805-078 A | 1996-09-01 | 1 | 11.10 KB | Engineering Guidelines for Grounding Lucent Technologies Switching Equipment in GTE Facilities |
| 808-210-070 | 1989-06-01 | 6 | 188.41 KB | Central Office Equipment - Control of Atmosphereic Environment or Central Office Switching Systems |
| 808-210-072 | 1987-04-01 | 3 | 299.88 KB | Environmental Control Guidelines for Storage of Electronic Equipment |
| 835-000-071 | 1991-03-01 | 1 | 1.90 MB | T1 PCM Repeatered Line - Transmission Considerations for Engineering |
| 880-100-072 | 1994-05-01 | 6 | 999.53 KB | Digital Data Service (DDS) With and Without Secondary Channel (SC) - Design and Testing Guidelines |
| 887-000-001 | 1990-07-01 | 1 | 139.18 KB | Requesting Deviations From Protection Practice Requirements |
| 887-000-007 | 1996-01-01 | 2 | 190.59 KB | Report of Damage to Telephone Plant Due to Power Faults or Lightning Activity |
| 887-000-101 | 1995-09-01 | 3 | 6.89 MB | RLH Fiber Optic Link - Description and Installation |
| 887-030-085 | 1996-12-01 | 6 | 2.15 MB | Radio Station Protection - Engineering Considerations |
| 887-030-087 | 1991-05-01 | 1 | 1.88 MB | Satellite Earth Station Protection - Engineering Considerations |
| 887-795-071 | 1995-11-01 | 1 | 3.38 MB | Electrical Protection of Workstations and Operator-Type Positions - Engineering Application |
| 887-800-030 | 1995-02-01 | 1 | 379.46 KB | Radio Frequency Interference (RFI) Mitigation Techniques |
| 887-800-045 | 1992-01-01 | 2 | 957.70 KB | Inductive Interference Measurement Using the Wilcom T132B Spectrum Analyzer |
| 900-001-003 | 1999-05-01 | 3 | 218.48 KB | Cable Numbering - Fiber |
| 938-360-011 | 1994-01-01 | 2 | 250.79 KB | TCDPG/DSC Installation, Maintenance, and Loop Prequalification Guidelines |
| 938-360-012 | 1995-02-01 | 1 | 522.57 KB | Power Pedestal - Description and Applications |
| 938-624-000 | 1989-04-01 | 3 | 968.06 KB | Optical Fiber Cable - General Outside Plant Design Considerations |
| 992-600-008 | 1983-06-01 | 1 | 286.76 KB | Repair and Return - Packing and Shipping Printed Circuit Cards |
| 992-750-005 | 1989-08-01 | 3 | 168.86 KB | Disposition of Central Office Equipment |
| 997-014-810 | 1978-04-01 | 2 | 10.74 MB | Type 80E Telephone Set - Shop Procedure |
| 997-015-800 | 1978-04-01 | 4 | 1.59 MB | Type 182A and 192A STARLITE Telephone Sets - Shop Procedure |
| 997-152-800 | 1978-06-01 | 5 | 5.26 MB | Type 980 STYLELINE Telephone Set - Shop Procedure |
| 997-153-800 | 1977-10-01 | 3 | 2.02 MB | DECO-TEL Specialty Models - Shop Procedure |
| 997-155-800 | 1974-09-01 | 1 | 212.02 KB | Emergency Telephone Set - Shop Procedure |
| 997-203-800 | 1972-09-01 | 3 | 9.65 MB | GTE Automatic Electric Type 860 Telephone Set - Shop Procedure |
| 997-203-800 A | 1974-09-01 | 1 | 275.56 KB | GTE Automatic Electric Type 860 Telephone Set - Shop Procedures |
| 997-220-801 | 1976-04-01 | 2 | 668.97 KB | Type 187 Telephone Set - Two-Wire to Four-Wire Modification |
| 997-250-800 | 1963-01-01 | 1 | 422.72 KB | Shop Procedure - Installation of A.E.Co. Anti-Stuffing Device Coin-Return Chute on A.E.Co. Paystations |
| 997-250-800 A | 1966-02-01 | 1 | 107.74 KB | Shop Procedure - Installation of A.E.Co. Anti-Stuffing Device Coin-Return Chute on A.E.Co. Paystations |
| 997-251-800 | 1966-06-01 | 1 | 415.86 KB | Procedure - Installation of Coin Gage Guards on Coin Telephones |
| 997-253-800 | 1967-10-01 | 1 | 403.78 KB | N.E.Co. Single-Coil Coin Relay - Shop Procedure - Installation |
| 997-256-500 | 1968-09-01 | 1 | 955.41 KB | A.E.Co. Local Prepay Coin Telephone (Series 89) - Shop Procedures |
| 997-256-800 | 1975-06-01 | 2 | 467.98 KB | Hookswitch Dialing Inhibitor - Modifications for Coin Telephone Use |
| 997-260-800 X1 | 1976-05-01 | 1 | 534.34 KB | Type 120A (Single-Slot) Coin Telephone Set - Rejector Mechanism - Sales and Service Centers |
| 997-300-500 | 1979-03-01 | 4 | 2.28 MB | Dials - Shop Procedure |
| 997-302-500 | 1968-09-01 | 2 | 1.68 MB | A.E.Co. Type 820 Handset - Shop Procedure |
| 997-306-500 | 1976-04-01 | 4 | 3.55 MB | Touch Calling Units - Shop Procedures |
| 997-308-500 | 1975-09-01 | 2 | 1.77 MB | Ringers - Shop Procedure |
| 997-308-500 A | 1978-06-01 | 1 | 531.39 KB | Ringers - Shop Procedure |
| 997-400-500 | 1966-06-01 | 2 | 5.08 MB | Electronic Secretary Model AO-3 - Mechanical Checks |
| 997-400-501 | 1966-06-01 | 2 | 585.46 KB | Electronic Secretary Model AO-3 - Electrical Tests |
| 997-400-501 A | 1967-04-01 | 1 | 602.73 KB | Electronic Secretary Model AO-3 - Electrical Tests |
| 997-400-800 | 1966-04-01 | 2 | 727.24 KB | Electronic Secretary Model AO-3 - Replacement Parts |
| 997-402-500 | 1966-03-01 | 1 | 269.62 KB | Shop Procedures - Mechanical Tests - Electronic Secretary Model SP-2 |
| 997-402-501 | 1966-03-01 | 1 | 401.46 KB | Shop Procedures - Electrical Tests - Electronic Secretary Model SP-2 |
| 997-402-800 | 1966-03-01 | 1 | 446.00 KB | Shop Procedures - Replacement Parts - Electronic Secretary Model SP-2 |
| 997-404-500 | 1966-05-01 | 1 | 3.20 MB | Electric Secretary Model LP-TD-C - Mechanical Tests |
| 997-404-501 | 1966-05-01 | 1 | 1.63 MB | Electronic Secretary Model LP-TD-C - Electrical Tests |
| 997-404-800 | 1967-04-01 | 1 | 1.34 MB | Shop Procedure - Replacement Parts - Electronic Secretary Model LP-TD-C |
| P356.030 | 1961-06-01 | 1 | 2.32 MB | Installation - A.E.Co., Type 86A Push Button Telephone Adapter |
| P356.221 | 1960-07-15 | 1 | 400.53 KB | Installation - Type 183 Suspension Handset |
| P356.238 | 1961-07-15 | 1 | 2.85 MB | Installation - A.E.Co., Type 86 Push Button Telephone Set |
| P356.255 | 1960-09-15 | 1 | 2.62 MB | Installation - W.E.Co. 631A1 Telephone (Call Director) |
| P356.255 A | 1963-02-01 | 3 | 163.30 KB | Installation - W.E.Co. 631A1 Telephone - Call Director |
| P356.318 | 1961-10-01 | 2 | 9.16 MB | Installation (Includes Circuit Description) - A.E.Co., 16A Dial Selective System |
| P380.680 | 1960-10-01 | 1 | 2.29 MB | Installation and Maintenance - A.E.Co., Type 31 Recorder Connector |
| P720.310 | 1962-01-01 | 1 | 1.11 MB | 1A Key Telephone Systems - Circuits and Descriptions (Individual Units) |
| P720.312 | 1962-01-01 | 1 | 1.03 MB | 1A Key Telephone Systems - Circuits and Descriptions (Strip Mounted Units) |
| P720.319 | 1961-06-15 | 1 | 455.62 KB | Circuit Description - 100 Multi-Line Key System |
| P750.706 | 1960-12-01 | 1 | 5.54 MB | Description and Use - W.E.Co. J94714-B Current Flow Test Set (35-F) |
| Sec. 23, Part 101 | 1954-05-01 | | 114.08 KB | Description of 332-Type Telephone Set for Subscribers with Impaired Hearing |
| Sec. 23, Part 102 | 1955-02-01 | | 449.95 KB | Installation of 332-Type Telephone Set for Subscribers with Impaired Hearing |
| Sec. 23, Part 106 | 1955-01-01 | | 1.04 MB | 6030A Key for Subscribers with Impaired Hearing |
| Sec. 23, Part 111 | 1956-10-01 | | 1.26 MB | Handset Telephones - Description and Use of ETDA-20 and ETWA-20 Telephone Sets for Hazardous Locations |
| Sec. 23, Part 112 | 1956-10-01 | | 405.37 KB | Installation and Maintenance of ETDA-20 and ETWA-20 Telephone Sets for Hazardous Locations |
| Sec. 23, Part 201 | 1957-10-01 | | 1.94 MB | Handset Telephones - Description and Use of 62-55 Type Prepay Paystation |
| Sec. 23, Part 202 | 1957-10-01 | | 1.71 MB | Handset Telephones - Installation and Maintenance of 62-55 Type Prepay Paystation |
| Sec. 23, Part 810 | 1957-09-01 | | 543.44 KB | Extension Ringing Relay Unit |
| Sec. 30, Part 4 | 1957-01-01 | | 128.91 KB | Conference Equipment for Use with 33A6 PABX - Description and Use |
| Sec. 30, Part 5 | 1957-01-01 | | 149.13 KB | Conference Equipment for Station Use with 33A6 PABX - Installation and Maintenance |
| Sec. 55, Part 575 | 1957-05-01 | | 150.70 KB | Dial Selective Intercommunicating Circuit - Description and Use |
| Sec. 55, Part 576 | 1957-05-01 | | 591.28 KB | Dial Selective Intercommunicating Circuit - Installation and Maintenance |
| Sec. 55, Part 660 | 1960-11-01 | 2 | 2.88 MB | Type 860A Key Telephone |
| Sec. 55, Part 1110 | 1957-12-01 | | 518.71 KB | Western Electric Equipment Units |
| Sec. 55, Part 1120 | 1959-08-01 | | 226.70 KB | 101A-B Key System - Description and Use |
| Sec. 55, Part 1121 A | 1960-10-01 | B | 117.79 KB | 101A-B Key System - Installation and Maintenance |
| Sec. 57, Part 503 | 1959-10-01 | | 605.73 KB | 551 PBX Switchboard - Circuit Description |