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
A301.8081951-06-2721.49 MBJ86446 (105D) Power Plant - Negative 48-Volt, 10-, 20-, and 30-Ampere Supply and J86251A Regulated Rectifier Unit - Electron Tube Type
A301.808 A1956-01-011552.11 KBJ86446 (105D) Power Plant - Negative 48-Volt, 10-, 20-, and 30-Ampere Supply and J86251A Regulated Rectifier Unit - Electron Tube Type
A301.8101952-07-0121.62 MB110A Power Plant
A301.810CA A1953-12-01B69.67 KB110A Power Plant
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
A366.1661930-05-22231.83 KBMethod of Taking Decoder Equipment Out of Service - Panel Offices
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
A401.701 A1934-03-304D1.51 MBVertical Drive Shafts and Associated Apparatus
A401.930 A1959-08-011D160.50 KBAir Dryer - KS-16523, List 1
A428.0021931-09-081D529.37 KBInterrupters - Reciprocating Bar Type
A438.6751940-04-022D3.61 MBSwitches - 300, 301, 302 and 303 Types
A446.0021932-04-291D423.94 KBElevator Apparatus - Panel Cordless "B" Link
A446.0031931-06-081D1.07 MBElevator Apparatus - Panel Line Finder
A446.0051932-01-081D638.40 KBElevator Apparatus - Panel Translator
A446.0061931-07-241D799.22 KBElevator Apparatus - Panel Selector
A448.0021931-09-172D636.56 KBClutches - Helical Spring Type and Associated Racks
A449.0021930-08-071D1021.17 KBPanel Selector Commutators and Commutator Brushes
A460.0061929-10-101D147.62 KB21 and 22 Type Telegraph Relays [Section pre-dates letter prefixes, is officially 460.006]
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
A460.0221929-08-071D580.05 KB196 Type Relays
A460.0331930-10-181D212.01 KBRelays - No. 85-F
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
A468.0021929-02-051D4.21 MB200 and 206 Type Selectors and 10 and 26 Type Banks [Section pre-dates letter prefixes, is officially 468.002]
A468.0021930-10-312D2.49 MB200 and 206 Type Selectors and 10 and 26 Type Banks
A468.0041929-10-081D643.39 KBPower Driven Rotary Selectors Together with Associated Banks
A468.004 A1933-03-222D740.07 KBPower Driven Rotary Selectors Together with Associated Banks
A470.0031931-07-091D656.12 KBSequence Switches - "A" and "B" Types
A470.003 A1933-11-293D1.92 MBSequence Switches - "A" and "B" Types
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
A560.1051961-02-0141.10 MBMethods of Denying and Restoring Service on Customer Lines - Panel Offices
A702.6251963-03-011627.56 KB23A Transmission Measuring Set (J94023A) (Description)
A710.0521956-12-0110700.13 KBPatching and Testing Cord and Plug Assemblies - 2-Conductor Cords
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)