Division A: Central Office Maintenance

Section Date Issue Size Title
A128.8191954-01-015614.40 KBChecking List - BSP MP Items Covering Sequence Charts, Operational Sketches, and Associated Reference Material - No. 4A or 4M Toll Switching System
A128.8201950-04-211149.39 KBChecking List - Toll Switchboard No. 3C or 3CL - BSP MP Items Covering Sequence Charts, Operational Sketches, and Associated Reference Material
A199.850PT1961-04-01A6.09 MBCentral Office Maintenance Telephone Directory
A204.5081961-11-0121.07 MBLine Concentrator No. 1A - Preinstallation Tests and Tests and Inspections At Time Of Installation
A217.1221958-05-017380.84 KBSelector Operation Test Using Dial Hand Test Set or No. 40C Test Set - Nos. 1 and 350A Step-by-Step Offices and Nos. 355A and 35-E-97 Community Dial Offices
A218.2201958-05-017380.84 KBSelector Operation Test Using Dial Hand Test Set or No. 40C Test Set - Nos. 1 and 350A Step-by-Step Offices and Nos. 355A and 35-E-97 Community Dial Offices
A252.0011958-05-017380.84 KBSelector Operation Test Using Dial Hand Test Set or No. 40C Test Set - Nos. 1 and 350A Step-by-Step Offices and Nos. 355A and 35-E-97 Community Dial Offices
A301.0251962-02-0131.93 MBLine Concentrator No. 1A - KS-15917, List 3 Battery Supply
A301.9161959-08-013324.38 KBKS-16001 Dehydrator and Associated Waveguide Alarms
A301.9171959-08-011232.67 KBKS-16153 Dehydrator and Associated Waveguide Alarms
A304.5431961-09-012632.33 KBLine Concentrator No. 1A - Cutover Procedures and Addition and Deletion of Individual Lines
A304.5441962-02-012434.27 KBLine Concentrator No. 1A - Trouble Analysis
A309.493PT1959-04-15A279.26 KBCoin Box Burglar Alarms
A309.514.18SW A1964-04-01B548.74 KBWork Units - Toll Testing-Telegraph-Program-Video and Overseas Radio - Form E-4418
A399.006PT1958-11-01A2.76 MBPrivate Line Service - Installation and Maintenance - Program Circuits
A399.006PT A1961-10-01B244.67 KBPrivate Line Service - Installation and Maintenance - Program Circuits
A401.9301959-08-011D160.50 KBAir Dryer - KS-16523, List 1
A438.6751940-04-022D3.61 MBSwitches - 300, 301, 302 and 303 Types
A460.014 A1958-05-012D235.97 KBRelays - 111 (Part of 163), 121, 122, 125, 149, 162, 178, and 179 Types
A460.015 A1960-02-011D72.47 KBRelays - 114, 124, 126, 174, and 198 Types
A460.0401958-01-017D4.37 MBRelays - 221, 222, 223, 224, 225, 247, 248, 251, and 252 Types
A460.055.11958-03-016D140.71 KBRelays - 275, 276, 291, 292, and 301 Types - General
A461.0051958-09-017D1.29 MBRelays - J Type
A461.0101959-01-014D5.35 MBRelays - Y Type
A493.1581951-06-0112.42 MBWestern Electric Electron (Vacuum) Tube Test Data - KS-15560 L1 Hickok Tube Tester
A501.9161959-01-013632.10 KBReplacement Parts and Procedures - KS-16001 Dehydrator
A501.9291958-03-011480.67 KBReplacement Parts and Procedures - Air Dryer KS-16432, List 1
A508.1061959-11-0141.38 MBElevator Apparatus - Panel Cordless "B" Link - Piece-Part Data and Replacement Procedures
A508.1071959-11-0141.96 MBElevator Apparatus - Panel Call Distributing "B" Link - Piece-Part Data and Replacement Procedures
A508.1081959-11-0141.32 MBElevator Apparatus - Sender Tandem Link - Piece-Part Data and Replacement Procedures
A509.9551949-06-132177.74 KBReplacement Parts and Procedures for Day-Brite Fluorescent Units for Frame and Aisle Lighting
A509.9561958-03-011177.96 KBPiece-Part Data and Replacement Procedures - KS-15673 Fluorescent Lighting Fixtures - Frame and Aisle Lighting
A509.9601960-06-011120.46 KBKS-15912, L1 Fluorescent Lighting Fixtures - Piece-Part Data and Replacement Procedures
A702.6251963-03-011627.56 KB23A Transmission Measuring Set (J94023A) (Description)
A804.901.001959-08-0117.27 MBGfeller Subscriber Line Concentrator 49-9-2 - General Description
A804.901.011959-08-0118.96 MBGfeller Subscriber Line Concentrator 49-9-2 - Detailed Circuit Operation
A804.901.021959-08-01118.00 MBGfeller Subscriber Line Concentrator 49-2-2 - Schematics
A804.901.041959-09-0113.80 MBGfeller Subscriber Line Concentrator 49-9-2 - Initial Preparation and Line-Up
A804.901.051960-03-0112.36 MBGfeller Subscriber Line Concentrator - Power Supply
A804.901.061959-09-0111.52 MBGfeller Subscriber Line Concentrator 49-9-2 - Apparatus Requirements and Adjusting Procedures
A804.901.071959-09-011567.38 KBGfeller Subscriber Line Concentrator 49-9-2 - Piece-Part Data, Replacement Procedures and Component Data
A807.0711961-01-01320.20 MBP1 Carrier Telephone System - Identification, General Description, and Use
A899.471PT1960-01-01B2.59 MBTransistorized Voice Frequency Amplifiers - 447A, 449A, 450, 457A (Altec)