000-000-001 Plant Series Issue 171 January 1967 AT&Tco Standard MASTER ALPHABETICAL DIDEX

BELL SYSTEM PRACTICES SECTION 000-000-001 Plant Series Issue 171 January 1967 AT&TCo Standard MASTER ALPHABETICAL DIDEX

ALL DIVISIONS AUTOTRANSFORMERS, 1. GENERAL Transmission Data ...•...... • 304 Other ...... •...... •...... 028 1.01 This section provides an alphabetically arranged list of the subjects covered in all divisions of the Plant Series of Bell System Prac B tices. BACKBOARDS 463 A BANKS, Panel Multipie, Al DIGITAL DATA TRANSMISSION SYSTEM 314 Cleaning ...... •. 069 ABBREVIATIONS, Requirements and Piece-Part Data ...... 026 General ...••...... •...... · · · · · · · · • · · · · · · • 005 Step-by-Step Switch, 620 Outside Plant •...... · · · · · · · · · · · 069 400 Cleaning ...... · · · · · · · · Radio Log •...... · · · · · · · · · · · · · • · · • · · · · · · · • Requirements and Piece-Part Data ...... 030 ACCOUNTING CENTER NO. 1, BASIC TRANSMISSION DATA ...... •• 304 General Description ...... •. ··· ·· ···· 968 BATTERIES, Other ...... · · · · · · · · · · · · · · · · · · · · · · · 213 Associated With Power Plants and ADMINISTRATIVE INFORMATION, Power Supplies ...... •..•.•..•..•...... 167 Central Office ...... · · · · · · · · · · · · · 201 Other •••.....•...... •...... •..•...•... 157 Customer Equipment ...... •.... · · · · · · · · 469 BATTERY FEEDERS, Plant Assignment Customer Equipment ...... • 460 Customer ...... · · • · . · · • · · · · · • • 680 Distributing Frames (Central Office) ...... 069 Trunk Plant and Special Services .•...... 682 400 BELL SYSTEM PRACTICES Radio ...... •. General Plan ...... •. · · · 000 AIR DRYERS .....•.... · •. · · • • · · · · • · • · · · · • · · · · · · 161 000 406 Ordering Information ...... ••...... · AIR-GROUND RADIO ...... · · • · · · · · · · · · • · • • · · "BELLBOY" ALARM CONTROL SYSTEMS, Central Office Equipment ...... 201 General Description ...... ····· 951 General Description ...... 975 Other ...... · •·· · · · · · · · · · · · • · · · · · · 201 Radio Equipment ...... •...... 407 ALERTING SYSTEMS, Records and Forms ...... •...... • 400 Description ...... •... · · ·. · · · · · · · • 981 BELLS, Other ...... •.• 480 Station Application •••.....•..•.••••...•... 501 ·~ ALPHABETICAL INDEXES, see INDEXES Other •...... •...•...... •. 028 ALTERNATORS AND ENGINE ALTERNATORS ··•·••··••• 155 BLOCKING, APPARATUS ...... •...•..•.•..... 069 AMA TAPE REEL ...... •.... · · • • · · · · • · · · · · • · · · · 034 BLOCKWIRE ..•...... ••...... •.•..••..•....•.. 462 AMPLIFIERS BONDING ...... •..•••••....•..•••...... 638 Apparatus •.••...•••..•..••••••••.•.•.•• · • • · 024 BOOTHS ..•.....•.•....•.•••....••....•...... 508 General Information •.•.•••••••.•..•..•.••.. 981 BRIDGES, Program 12C and 14C , ••..•••••.•• • • • • • • • • · • • 320 Composite Set ..•.••...... •..•..... 103 314 ANALOGUE DATA TRANSMISSION SYSTEMS ...... •• Impedance .....•...... •.....•.•...... 103 514 ANNOUNCEMENT SETS •....•••..••••.•.. · · · · · · • · · · BROADBAND RESTORATION ...... 371 ANNOUNCEMENT SYSTEMS, BRUSHES, Apparatus ...... •...... •...... •.• 034 Commutator ...... •...... •... 026 Central Office Equipment .....•...... 201 Multiple • • . • ...... • . • ...... 026 General Description ••.•.••.•.•••..••••.•••. 951 BUILDINGS Station Control Apparatus- SA & 9A •••••... 514 Engineering • . . . . • • . . • . • • • . . • ...... • • • . • . . . • 760 ANSWERING SETS AND SYSTEMS .•..•••.•...•••.••. 514 Operation ••.•••.••.••••.•••.•..•••.•.••.••. 770 ANTENNAS ...... •.•..••..•.... , .... •. • •.•. 402 BUZZERS, APPARATUS BLANKS •...•••...••••• , , •.••••.••.•. 501 Station Application .•...... •...... •...... 501 APPARATUS MOUNTINGS .•.•.••••..••••..•.••••.•. 463 Other ...... •...... •....•...•..•.... 028 ATTACHMENTS .(Wire) .••••.••.••••••••.•.•.••••. 462 ATTENUATION DATA - CABLE AND OPEN WIRE •••...... •....••.•.•...•...•• • • 304 ATTENUATORS c Radio ..•.••...... •...... • .•. • ...... 104. Other .....••...•.•.•...... •.•.•.••.•.•. 103 CABINETS (Equipment, Station Systems) ....•... 463 AUTOMATIC CALL DISTRIBUTING SYSTEMS - See CABLE, CALL DISTRIBUTING SYSTEMS Aerial ...... •....•..•.....•.•.•••.•.. 627 AUTOMATIC DATA TEST CIRCUITS ...... •. 205 Biock •..•...•...... ••••.•.••••••.... 627 AUTOMATIC DIALERS .....•...•...... 512 Buried •...... •.•....•.•..••...•.•••...... 629 AUTOMATIC NUMBER IDENTIFICATION Cable and Open Wire Testing and Trouble I (General Descriptive) ...... 951 Location Procedures ...... 330 AUTOMATIC PROTECTION SWITCHING Coaxial, Office - Splicing and Terminating . 069 (Microwave Radio), Completion Tests- Exchange-Area Cables .... 330 "One-for-Five" (TD-2) ...... • ...... • . . . . . 410 Electrical Testing and Identification •..... 634 lOOA ("Two-for-Ten" - TD-3) .•...... 411 General ...... ••.••.•.••• ·••••••••.••••••.. 626 AUTOMATIC TRANSMISSION MEASURING House 627 SYSTEM (ATMS) ....•...... ••..••...•.•.....•.• 103 Page 1 Prioted in U.S.A. SECTION 000-000-001 Pl •...... •.....•...... •...•...•.••. 363 Inside Wiring ...... 461 7F Test Set •...... •...... •....•••.••.• 363 Pressure Systems ••...... •.•.•...• 637 Tl Type Splice Closures ...••..•...•...... •...... 633 Compatibility Information .•...... •.... 179 Splicinp; ...... •...... •...... 632 Outside Plant ...•....•..•.....••..•...•.. 632 Submarine .•••.•.•••••••••••••••••.•••.••••• 630 Other ....•.•....•.•..••..•••.....••..••• 365 Switchboard - Cabling, Wiring, Skinning, Wire Line Entrance Links .....•..•...••..... 357 Connecting ..•...•.•••...... •..••• 069 CARTONS, SHIPPING ....•....•.••.•••.•••...••.• 500 Underground •••..•.•••.•.••••••••. , • • • • • • • . . 628 CENTRALIZED MANUAL CONTROL SYSTEM •.••••.•.•.. 310 CABLE AND OPEN WIRE PLANT- MAINTENANCE ...... 660 CHANNEL BANKS- (J, K and L Type Carrier) •.•. 356 CABLE PROGRAM SYSTEM .....••.•••.•.••.•.•••... 320 CHANNELS FOR FEDERAL AVIATION AGENCY, AIRLINES CABLE PRESSURE LEAK DETECTOR CIRCUIT, AND OTHER AGENCIES ...... • . • • . . . • • • . • • • • . • . . . 310 AUTOMATIC ...... •..•.....•...... ••...•.••..• 102 CHANNELS FOR POLLING TELEVISION RECEIVERS • . . . 310 CABLE PROTECTION ALARMS ...... •...... 201 CIRCUIT BREAKERS .....•..•..•..••..•...... 026 CABLE TEST DESKS . . . . . • ...... 662 CIRCUIT JUNCTION CABLE TRANSMISSION DATA ...... •...... •....•• 304 LOSS DATA .•...... ••...... •...... •.• 304 CABLING- (Customer Equipment) ...... •.•.•.•.• 461 CIRCUIT ORDER AND TRUNK ORDER TESTING ...... •. 660 CALCULAGRAPHS ...... •.....•...••...... •..•. 030 CIVIL AIR DEFENSE WARNING SYSTEMS (CADW), CALL ANNOUNCER MACHINES ..••...... ••.. 161 Bells and Lights (Customer Equipment) ....•. 480 CALL DIRECTOR • . . . . . • • ...... • . • . • • • • . • • . • • . • • • 502 General Description ...... •..... 951 CALL DISTRIBUTING SYSTEMS (Customer Equipment), Other ...... 201 General Description ...... •.. 981 CLASSES OF PROGRAM SERVICE .•.•....••••••••••• 320 No. lS ...... •....•....•...•••.•....••.••. ; . 475 CLEANING, APPARATUS •...... •...•..•.•...... •• o69 No. 2A and 3A •••••••.•••••••••••••••••••••• 476 CLEANING CABINET ...... •..•..•...•. 034 CALL TIMING SWITCH . . • ...... • . • 030 CLEANING FLUIDS . . . • ...... • • ...... • . . . • 065 CAMERAS ...•...•.•...•...•.....•...... •..... 030 CLEANING, GENERAL ...... •...... •• 069 CAPACITORS, CLOCKS ...•...... •.•...... 030 Station Application ••••..•••••.•...•••••••• 501 CLOSED CffiCUIT TV •••••••••••••••••••••••••••• 641 Other ...... ••...... •••••.•••...••••• 032 CLOSURES, CABLE •.•..•••.•...... •...•••.••• 633 CARD CODING (659-TYPE) TOOL .....••.....••.••. 034 COASTAL HARBOR RADIO • ...... • . . . . . • . . . . • 403 CARD TRANSLATOR, 1-TYPE, COAXIAL CABLE TELEVISION TRANSMISSION Maintenance ••...•.•...... •.•..•• 034 SYSTEMS - RF TYPE . . . • ...... • ...... 318 Tests ...... •...... •...... •...••.....• 212 COAXIAL CABLE TRANSMISSION CARRIER AND PILOT SUPPLY- (J, K and DATA ..•...... •...... •.....••..•• 304 L Type Carrier) . • . • . . • . • • • . . . . . • . . . . • • . • • • • • 356 CODE CALLING SYSTEMS- (Customer Equipment) .. 473 CARRIER APPARATUS, (Outside Plant) ..•..••.••. 640 COIL CASES, GENERAL ...... • • • . • • • • . • • • . . . . 626 CARRIER FREQUENCY COIN COLLECTORS, LOSS DATA ...... • . . . . • . . . . . • ...... • . • • 304 Common Battery .•.•.••....••.•.•••.•••...•.• 506 CARRIER FREQUENCY TRANSMISSION MEASURING Local Battery and Magneto •.•••••.•••••..••• 510 SETS •...•...... •....••••...••.••.••...•.• 103 COIN CONTROL, CARRIER PROGRAM SYSTEMS ..•.....•••••••.•••••. 320 Inband method (General Descriptive) ...••.•. 951 CARRIER SYSTEMS, CO IN RELAYS • • • . . • • • . . . . • . • . . . . • • . • • • . • . • . • • • . 5o6 Broad Band Carrier, Common Equipment COMMAND CONFERENCE SYSTEMS - (Customer Components ...... • ...... • . . . • . . . . • . • . • 356 Equipment) •..•.•••...... •.•..•.....• 480 Carrier and Pilot Supply ...... •...•.••. 356 COMMAND POST ALERTING NETWORK (COPAN) ...... • 310 Channe 1 Banks . • ...... • ...... • 356 COMMON LANGUAGE • • . • . • . • ...... • ...... 005 Group Connecting Circuits ..••...... •..... 356 COMPATIBILITY INFORMATION, SIGNALING AND Line-up of Groups in Tandem ...... •. 356 TRANSMISSION SYSTEMS • . . • ...... 179 Noise ~nd Modulation Tests ...... •...•.... 356 COMPENSATING RESISTANCE - REVERTIVE AND Patching Bays ...... •...... •. 356 PCI PULSING • . • ...... • . . . . . • ...... 201 Submaster and Master Group Equipment ..... 356 COMMUNITY DIAL OFFICES See STEP-BY-STEP OFFICES Supe~roup Connector ...... •...... •...... 356 COMMUTATOR BRUSHES ...... •....•.•.•••...•..... 026 Terminal Equipment Components ...... •.... 356 COMMUTATORS ...... • ...... • . . . 026 Terminating Arrangements ...... 356 COMPENSATORS ...... • . . . • ...... • ...... • . . 026 C,H and Miscellaneous Types ...•....•...... 352 COMPLAINTS, ENGINEERING ..•.••.•...... •.•....• 010 J Type ...... 354 COMPRESSORS AND COMPRESSOR-DEHYDRATORS •••.•.• 161 K Type ...•.....•...... •...... 355 COMPUTATION AIDS, TRANSMISSION ...... •.•• 304 Ll Type ....•...•..•...... •....•.•...... 358 CONCENTRATORS (General Descriptive) ...... • 951 L3 Type ...... •.•.....•.....•...... 359 Maintenance Center, CONCENTRATORS, LINE ...... •.••..••.• 067 CONCENTRATORS, (Outside Plant) .•..••.•.•....• 639 "I Ll and L3 Type ...... • . . . . • ...... • . . . . 360 I N, Nl, N2, N3, 0 AND ON TYPES CONCENTRATOR SYSTEMS - (Customer Equipment) 067 CONDENSED SECTIONS, see Particular Division Carrier Group Alarm .•..••..••.•....•..... 362 CONDITION BLUE, ETC - RESTRICTIONS Deviation Regulator ...... •.• 362 OF PLANT ACTIVITIES .•...... , 010 Junctions ...... •...... •.•...... 362 CONDUIT, ON/K Systems - Repeatered High-Frequency Line ...... ••...... •...•... 362 Customer Premises ..•...••.•.••....•••••..•. 461 Outside Plant ...... ••.•..•..•...... •.•..•.. 622 ON/Radi~ Systems - Radio Multiplex Points. 362 Repeaters ...... •...•.•...... • 362 CONFERENCE SET . • • • • • • • . . • • • • • • • . • • . . . • • . . . . . • 512 CONNECTlNG . . • ...... • . . 069 Signal Receiver Unit •.•.•...... •...... 362 Terminal Equipment . . . • . . • ...... • . . 362 CONNECTING BLOCKS ...... •.•••.••...•••...... 461 P Type CONNECTORS ...... • ...... • ...... 032 General Description ••••. :...... • • • . . . • 970 CONNECTORS (Outside Plant) ...•..•....•...... 636 CONNECTORS, SOLDERLESS, POWER •...... •.....• 069 Page 2 SECTION 000-000-001 CONSOLES, Selector ....•...... •..•••••.••..•.••.•••• 504 Telephone •...... •••...... ••••.•.••. 504 DATA SETS CONSTRUCTION EQUIPMENT (Outside Plant), General Information •..•..••..•.....•.•....• 590 Application ...••..•...•...... •...•...... 649 100 Series and Associated Services ....••.•• 591 Maintenance ...... •...... 720 200 Series and Associated Services .•.•.••.• 592 CONTACTORS ...... 026 300 Series and Associated Services ...... •• 593 CONTACTS, APPARATUS - CLEANING, 400 Series and Associated Services .•••.•••• 594 RECONDITIONING AND REPLACING ...... 069 600 Series and Associated Services •••..•••• 596 CONTROL PANELS •..•..•...... •...... •.•. 026 Transmission Tests •.•.•....•..•...... •• 314 CONTROL UNIT 60A ...... 103 DATASPEE.D ...... ••.•.....•.•.....•.••.. • · • 592 CONTROLLERS, DATA SYSTEMS, Control Units ...... 024 Auxiliary Equipment •••••.•..•.•..•• 590 and 598 Engine Control Circuits ...... •... , ••.•.•.• 024 Digital and A~logue Transmission ..•..•.... 314 Master Controllers ...... •..•.. ,,. 024 General Description ..•...•.••.•.••.•••.• ·• · 972 Voltage Controllers ...... , ...... 024 Selective Calling Systems 8Al and 8Bl ...... 581 CONVERSION TO UNIFORM NUMBERING PLAN ...... 000 DATA TEST CENTER, · · · · · · · · · · · · · · · · · · · · · · · · · · · · 668 CONVERTERS DATA TEST CIRCUITS, AUTOMATIC Station - TTY •..•...... •.••.•.•... 570 Maintenance ...... 205 Other ...... •...... 161 DATA TEST SETS, COPAN NETWORK ...... •...... ••..... 310 Pulse Measuring ••.•...••••..•.•••.•.•.•.... 103 CORD REELS, 911A, B and C •...... •... 103 Station Application .....••...... •.•...•. 501 Other ••....•.•.•..•...••.••.••••.••.•••.•.• 107 Other ...... •...... •••....••.•.• 032 DATA UNITS ..••...... •... · • · · · • · · • · • · · · · · • 590 CORDS, DEDICATED PLANT Station Application ...... •...... 501 Assignment Records ...... 680 Other ...... •...... •.....••..•.•.• 032 Outside Plant ...•.....•.••....•...... 642 COUNTERCELLS ...... 157 Station Application •...... •....•...... •.. 462 COUNTERS ...... •...... 030 DEFINITIONS ...... •...... ·. · ... ·. 005 CRASH ALARM SYSTEMS- (Customer Equipment) .•• 480 DEHYDRATORS . . • • . . . . . • . • . . . • ...... • . . . . . 161 CREDITING CHARGES ON TEST CALLS ...... •..... 010 DELAY MEASURING SETS . . • • ...... • . . . . • ...... 103 CROSSBAR OFFICES DESIGNAT!ON CARDS ...... •...... 030 No. 1 DESIGNATION STRIPS (Stations) .....••...•..•.. 501 Equipment Design Requirements ...... 816 DESKS, PLANT, TRAFFIC AND SERVICE OBSERVING General Description •...... •..••...... 957 General Description .••.•.•....•...... •..•.• 953 Other •...•...... •.•..•..•...... • 216 Other ....•. , ...•.•...... •...... •..•...•.. 210 No. 5 DETECTORS (Radio).,., ..•....•....•....•.•.••.. 104 Equipment Design Requirements .•...... •• 819 DEVIATION REGULATOR N AND ON2 CARRIER SYSTEMS . 362 General Description •••••...... ••••....•.• 958 DIALERS, AUTOMATIC •..•.....•..•...•..•••••... 512 Other ...... ••....• , ..•.•..••.. 218 DIAL TONE SPEED REGISTER AND SPEED Tandem INDICATING CIRCUIT Equipment Design Requirements ...... 817 Description ...... ·. . . 951 General Description .•...... , . • . • • . . • • • • . • 960 Other ...... · · · · · 252 Other .•.•....•.•.•.•.•..•.•....••••...•.. 220 DIALS, DIAL ADAPTORS AND MOUNTINGS, Toll Switching, No. 4A and 4M, Station • ...... • . . . . . • ...... • • . . . • . • • • • • • . • 501 Equipment Design Requirements ...... 818 Other ...•...... ••...... •.••....•..•.•.... 028 General Description ...... •••....•.. , • • . • 964 DIGITAL AND ANALOGUE DATA TRANSMISSION SYSTEMS, Other ...... ••.••••• ~ •. , ..••. , • . . . 212 Al Digital Data Transmission System ...... 314 CROSS CONNECTIONS, DISTRIBUTING FRAME ..•...•. 069 Data Line Switching Network ...... 314 CROSS REFERENCE LISTS A Series to Plant Series ...... •.. 200 Data Systems - Common Circuits, Equipment ... and Procedures • • ...... • ...... • ...... 314 B Series to Plant Series ••••••• 0. 0 0 •• 0 •••• 000 Data Systems on Direct Distance Dialing Series to Plant Series •••• 0 ._...... c 000 (DDD) Network • : . •.•...... •....•...... 314 E Series to Plant Series 0 ••• 0 0 ••• 0 ••••• 0 •• 300 Data Systems on Private Lines ...•...... 314 • 0 0. 0 • 0 0 •• ; ••••••• 000 F Series to Plant Series Dial TWX on Direct Distance Dialing (DDD) G Series to Plant Series 0. 0 ...... 0 •• 0 0. 0 0 •• 000 Network . . . . . • ...... • ...... • . . . . . • . . . 314 H Series to Plant Series ...... 000 Sage Data Transmission Systems ...... 314 ·- J Series to Plant Series •••••••• 0 •••••••••• 000 Telephotography ...... • ...... 314 M Series to Plant Series •• 0 ••• 0. 0 •••• 0. 0 •• 000 Wide Band Data Systems ...... •...... 314 P Series to Plant Series ..•...•...... •.•.. 000 DIODES, R Series to Plant Series ..•....•....••..... 400 Station Application ...... •....•.•....• 501 AA Series to Plant Series ...... 800 Other •...... •.•..••••.. 032 950 Series to Plant Series ...... 000 DIRECT DISTANCE DIALING CROSSTALK DATA AND COUPLINGS ••••••••••••••••• 304 Equipment (General Descriptive) .••..••.•••• 951 CROSSTALK MEASURING TEST SET ...••..•..•.•••.. 103 Notes on DDD .•.•.•.•....•••....•.•...•.••.. 010 CUSTOMER-OWNED EXCLOSURES, DIRECTORY, TELEPHONE, STATION COMPONENTS FOR ...... •...... •...... • 501 1 Alcove . , ...... •...... ••.•...... ••.••.•. 508 CUSTOMER TROUBLE REPORTS ...... 660 Hangers, Fasteners, Binders ...... •••••...•• 508 Tables, Cabinets, Shelves ...... ••.••.•.•... 508 D DISPATCHING SERVICE- (Customer Equipment) ... 473 DATA, DISTRIBUTING FRAMES, Auxiliary Sets ...... 598 Description, Maintenance and Protection .... 201 Selective Calling Systems 8Al and 8Bl ....•. 581 Terminating Crossconnections ...... 069 Units •..•...•.•...... •.....••..••.••.•..• 590 • Trolley Type Appliance Outlets ...... 065 Page 3 SECTION 000-000-001 EQUIPMENT CABINETS (Station Systems) ...•...•. 463 DISTRIBUTORS ...... · · · · · · · · · · · · · · · • · · · · · · 034 DRAWINGS, EQUIPMENT DESIGN REQUIREMENTS, General Information ....•...... •...... •• 005 Cross Reference Lists ...... •..•...••• 800 Handbook Size, Checking List •...... •• 460 No. 1 Crossbar Systems ...... •...... 816 DRIVE-UP PUBLIC TELEPHONE .•.•••••.•.•...... 508 No. 4 Type Toll Switching Systems ...... 818 DRIVES, PANEL AND MOTOR •.•...... •.•...... 159 No.5 Crossbar Systems ...... 819 DROP WffiiNG ••.••.••.....•.• • ·. • • · • • · · · · · · · · · • 462 Step-By-Step Systems .•....•..•...... •• 814 Tandem Crossbar Systems ...... 817 DROPS ...... · · · · · · · · · · · · · · · · · · · · · · 032 DRY CELLS ...... · · · · · · · · · · · · · 157 EQUIPMENT ENGINEERING (SEE EQUIPMENT DESIGN DUSTING ...... · · · · · · · · · · · · 069 REQUIREMENTS) DYNAMOTORS ..•...... •.... · · · • • • · · • · · 159 EQUIPMENT TRANSMISSION DATA ...... •...... • 304 EXCHANGE AREA CABLES, Completion Tests ...... •..•...•...... 330 Transmission Data •..... ·.•....••...... • 304 EXHAUSTER SETS ...... • ...... 161

E EC EMERGENCY RADIO •....•...... •...... •..• 403 ECHO SUPPRESSORS ...•...•.•.... · · · • · • · · · · • · · · • 332 ECHO SUPPRESSOR TEST SET ....•.•..•.•••.••.••• 103 ED EMERGENCY RADIO ...... · • · · 403 F EDGE SORT CARDS ...... · · · · · · · • • • · · · · · · · 010 FANS, ELECTRICAL INDICATING INSTRUMENTS Booth .•...••..••••....•...••.••...... ••• 508 Catalogue Information ...... •••..••... 084 Other ...... •.••.•...... •.....•••...... •. 161 Common Us~ge - Maintenance, Selection and FARM INTERPHONE ...... • • • • • . • • . . . • . • 512 Use ...... •.. · · · • · · · • · · · · • · • · · · · · · · · • · • 100 FASTENERS . . • . . . • . • • • • • • . • • • . • • . • . . . • . . • . • • • • . 080 Switching Systems and Power - Maintenance, FAULT LOCATION, Selection and Use ...... •...•..•...•.• · · · · 102 Exchange Cable Pairs ••....•.•...... 330 ELECTRICAL TEST EQUIPMENT, (Outside Plant) •.. 106 FEDERAL AVIATION AGENCY ...••.•..••.•.••••..•. 310 ELECTROLYSIS, (Outside Plant) ....•....•.....• 635 FEDERAL MICROWAVE RADIO ...... •.•.•.... 408 ELECTRON TUBES FEDERAL TELECOMMUNICATIONS SERVICE (FTS) ..... 310 General Information ...... •.•.•.•.. ·· ··• 024 FEEDERS, Station Application ....••..•...•••...•••..• 501 Battery- (Customer Equipment) ...•...... •. 460 Test Sets and Test Data •.....•...•.••..•..• 100 Ringing- (Customer Equipment) .....••.•...• 460 ELECTRONIC SWITCHING SYSTEMS (ESS) FILAMENT SUPPLIES • . • ...... • . . • . 169 No. 1 FILTERS (Station Application), Description ...... •..•.•.... 966 Battery Supply ...... •..••••••••....•.... 518 Other ...... •...... •. 231 Radio Frequency (Due to Dialing) •.••..••.•. 501 No. 2 FINGERWHEEL (Dial) ...... •.••...... •...... 501 Description ...... •.•...•...... •• 966 FIRE FIGHTING ...... • ...... 010 Other ...... •...... ••...... ••....••.• 232 FffiST AID .....•...•...... •••••.....•.••...... 010 No. 101 FITTINGS, FLOOR DUCT AND WffiEMOLD .....•...... 461 Description ...... •..•..•.. 966 FIXTURES • . . • . . • ...... • . . . • . • ...... • 06 5 Other ...... •...... •.... 240 FM TERMINAL TEST SETS .•...... 104 ELEVATOR APPARATUS - PANEL SWITCHING SYSTEM 026 FOREIGN EXCHANGE SERVICE ....•.•...••.••.•.•.• 310 ELEVATOR TELEPHONE SET ....••.•.•..•••••.••.•• 502 FOUR-WffiE SWITCHING PLAN USING NO. 5 CROSSBAR EMERGENt"'£ ALARM SYSTEMS - General Description .•..•.••••••.•.•.•.•.•.. 958 CENTRAL OFFICE ...... 201 Other ...•...... •...•...••...... ••...•.... 310 EMERGENCY CONDITIONS - RESTRICTIONS OF FREQUENCY ALLOCATIONS .•...... •...... • 304 PLANT ACTIVITIES ...... • . . . 010 FREQUENCY ANALYZERS EMERGENCY LINE OR TRUNK TRANSFER CIRCUITS .... 201 Radio ...•...... 104 EMERGENCY POINT-TO-POINT RADIO, EC AND Other ...... •...... ••. 103 ED SYSTEMS ...... • • . . . . . • ...... • . 403 FREQUENCY SHIFT PULSING NO. 5 CROSSBAR OFFICES EMERGENCY REPORTING SYSTEMS, General Description ...... •..•.... 958 Central Office Equipment ...... 067 Other .....•...... •..•...... •.... , 218 Customer Equipment ...... 473 FRICTION PADS, KS-8035 ENGINE ALTERNATORS .••...... •.•.••.•...• 155 Key ..••...•.•••••...... •...... •... 512 ENGINE FUEL .•....•...... •...... •.. 065 Telephone Set ·, . . • . . . . • . . . . • . • . . • . . . • . • • . . . . 502 ENGINEERING, FTS (Federal Telecommunications Service) ..... 310 Radio .•..•...... ••...... 940 FURNITURE .•...... •.....•...... •..• 065 ENGINEERING COMPLAINT PROCEDURES ..•...... ••. 010 FUSES AND MOUNTINGS ...... ••...... 026 ENGINES AND ENGINE SETS .••....•....•.•...... 159 EQUALIZA~ON OF PROGRAM AND WIRED MUSIC CIRCUITS . . . . . • . . . . • • . • • • • • • • . • . . • . • . • • . • . • • • 320 EQUALIZERS, Envelope Delay Characteristics .•..•.•...... 314 Program Circuits ...... •.•.••.....•....••.•• 320 Page 4 SECTION 000-000-001

G IMTS (Improved Mobile Telephone Service) - MJ SYSTEM .••.•.•.....•.•..•..•..•.••.••.•..• 405 GAUGES, INDEXES, Catalogue Information .•...•••.•.....•.....• 084 Alphabetical, Common usage - Maintenance, Selection and Building Engineering and Operation •.••.•. 760 Use ..•...••.•....•. • • · · • · • · · • · · · · · · • · · · • · • 085 Customer Equipment ...•••.•.•.•••...•..... 460 GENERAL EQUIPMENT REQUIREMENTS (SEE EQUIPMENT No. 5 Crossbar •..•.•....•...•••.•...•••.. 218 DESIGN REQUIREMENTS) Gauges- Catalogue Information .•.••..•.•• 084 GENERAL INFORMATION, All Divisions ..••...... 000 Master •.•.•.....••..••...... •....•.•.•... 000 GENERAL INFORMATION (Customer Equipment) ..•.• 460 Outside Plant .•...... •...•.•.•.• 620 GENERAL INFORMATION (Divisions 020 to 179) ... 020 Plant Assignment ...... •.. 680 000 GENERAL PLAN, Plant Series ...... •.•... ~adio ...... • 400 GENERATORS, Station Equipment ••.••••••••••••••••••••• 460 Charging •.•..•••...••.••••••••••••••••••••• 155 Step-by-S.tep and Community Dial •••.•.•••• 226 Milliwatt Reference •••••...••.•.•••.••.•••• 103 Supplemental Information -Central Office . 201 Motor ••.••.••..•..••••••••••••••••••••••••. 155 Test Center Operation ...... 660 Ringing •••.•••.•....•...••••.••.•.•••••.••• 155 Tools- Catalogue Information •.•••••.•.•• 074 Signal Code, Radio ... , ....•.••.•..•.•..•.•..••.....••. 104 Numerical (Station Equipment) •••••••••.•• 460 Other •...... •••..••.•...... •..... • • •. • · 103 Numerical, GFELLER LINE CONCENTRATOR •••••••••••••••••••• 067 Division, see Particular Division GLOVES, INSULATING Master .••••.••....••••.. , ...•••....•••••. 000 Outside Plant ....•...... •...... •... 081 INDUCTIVE NOISE, STATION EQUIPMENT ••••••••••• 500 Other ...... •.•....•••..•.•. • .. • · • • · · · · · · 075 INFORMATION DESKS (Central Office) 620 GOGGLES ••..••••.••.•..••.•••••.•• · • • • • • • · • • • • General Description .....•....•.•.•.•.•••••. 953 GONGS, Other ...... ••.•..•..•...••.•.•..••••.• 210 Station Application •••••••.•••••••••••••••• 501 INFORMATION DESK (Customer Equipment) ...... 475 Other ••...•••••••.•••••••••.••••.••••••.••. 028 INSERTION LOSS DATA ••.•..•...... •.•....•... 304 GOVERNMENT SERVICES (Customer Equipment) •.... 480 INSULATING CONTACTS- METHOD ...... •.....•. 069 GREASES ...... •..... •. · · · • · • • • · · • • • · • 065 INTERCOMPANY SERVICES GROUND RODS ...... ••..•••...••.•. • • • • • • • • · • 638 COORDINATION (ISC) PLAN ....•••.....•...... •• 010 GROUNDING REQUIREMENTS, INTERPHONE SYSTEMS ...... •...... •.•••...... 512 Autotrailers •...••..•.•.•...•••••••.••••••• 462 INTERRUPTERS, Booths •.•..•••.•.••••..••••••••.•••••..••.• 508 Station Systems ...••.•••••••••••••••.•••.•• 518 Portable Electric Power Tools •.•.•..•.•..•. 080 Other .....••.•.•..•..•••••• , ••• , •••••• , , , , • 163 Power Plants ••.••...... ••.••...•••..••..••• 167 INVERTERS, Protector and Signaling Grounds ••.•••.••••• 638 For Telephone Answering Sets ••••••••••••••• 514 Sign, Illuminated •••••••••••••••••.••••.••• 508 Other •....••••.••.•••••••••.•••••••••..•••• 161 GROUP ALTERING SYSTEM, ISC PLAN ••...... , ....•...... •.• 010 Customer Equipment ...•.•...... 480 Other ...... 310 GROUP CONNECTING CIRCUITS - (J, K and L Type Carrier) ...... ••..••...... 356 J JACKS, Station •.•••.•••....••..••..••••••••••••.•• 461 H Other •••••••.•.•...•..••••..•...... •••.••• 032 Cleaning ..•.•...••....•..•.....•...... •• 069 HANDLING, JCSAN NETWORK ...... • . • . . . . . • • . . • . • . • . . . . • • 310 • Disconnected Station Apparatus .•..•...••.•• 500 JOINT CHIEF OF STAFF ALERTING NETWORK (JCSAN) 310 Wire and Cable (Station) ...... 461 JUNCTIONS HANDSET CORDS •.•.•••••••••..•••.•..••••. , •.•. 501 Type 0 and ON Carrier Systems .••..•..•....• 362 HANDSETS .....•..•.....•. ,· ..•.••...••..•••..•• 501 JUNCTION LOSS DATA . . . . . • . • ...... • . . . • . . . . . • • 304 HAND TELEPHONE SETS .• • • • • • • . • • • • • • • • • • . • . . . . • 510 HEADBANDS AND PADS , ••. , • , •.•.•. , , •••••••••••• 028 HEAD TELEPHONE SETS ••..••••• , • • . • . • • . • • . . . . • . 028 HEATER BASE, KS-14782 •.•••.•••••...••.••••.•• 514 HIGH SEAS RADIO ...... • 403 HOME INTERPHONE •.•••.•••••.•.•.• , . , , • • . • • . • . . 512 .. HOME-TO-SCHOOL INTERCOMMUNICATING SYSTEM • • • • • 512 K HORNS, AUXILIARY SIGNAL ••.••••...•.•.••.•.••. 463 KEY EQUIPMENT, llOA Portable ...... •...... •.•... 314 KEY EQUIPMENT, STATION ...... 512 KEY SERVICE UNITS .• .• .. • • • • • • . . • • • • • • • • . • . • • • 518 I KEY TELEPHONE SYSTEMS • • • • • • • . • • • • • • • • • • • • • • • . 518 IMPAIRED HEARING TELEPHONE APPARATUS ....•.•.• 500 KEY TELEPHONE UNITS •...•.•..••.•.•.••..••.••• 518 IMPAIRED SPEECH TELEPHONE APPARATUS •••..••... 502 KEYS, IMPEDANCE DATA - CABLE, OPEN WIRE Station Equipment ..••••..•.••••.••••••. , , •• 512 AND EQUIPMENT .• ...... • 304 Other •...••...... •...•..•...•.••.•.••••..• 032 IMPEDANCE MATCHING DEVICES (Radio) ..•...... 104 Page 5 SECTION 000-000-001 MICROFILM SYSTEMS ...... •.•..•.•.•.•.•...... 006 L MICROWAVE RADIO - see RADIO MILLIWATT DISTRIBUTING SYSTEMS •....•.•••....• 103 LADDERS AND LADDER SEATS (Central Office), MILLIWATT REFERENCE GENERATORS .•••••••....•.• 103 Maintenance ...... • . . . . . • 065 MOBILE RADIO, Safety Precautions ...... •...... •...... 010 Manual ...... 404 .J LAMP CAPS, MJ (IMTS) ...... 405 Method of Placing ...... •... 032 MODULAR STATION APPARATUS ••••••.••••••••••••• 512 ~MPS, MONITORING ARRANGEMENTS FOR PROGRAM SYSTEMS . , 320 Booth •.•.••.••••.••••.••••••••••.•••.•••••• 508 MOTOR VEHICLES ..••.••.••..•.••• , , ..••. , •••••• 720 Message Waiting ••.•.•••.•••..••••••••••.••. 502 MOTOROLA MICROWAVE RADIO .•••••••••••••••.•••• 408 Resistance, MOTORS •• , ... , , .•....•••..•••... , , . , , , .••••••. 159 Station Application •..•••.•.•.•••.•.•••.• 518 MOUNTING CORDS •.••.•.•.•• , , ••••• , • , • , , • , , • , , , 501 Other •.••.••••••.•.•••..••••.•••••••••••• 032 MOUNTJNGS (Station E4uipment), Switchboard • • • • • • • • • . . • • • . . • • • • • • • • • • . • . • • • 032 Apparatus ••....•••••..••••.•••••••••••••• , • 463 LETTERING AND NUMBERING ...... •...... •.•... 069 Dial ••••••..•••.•••.••. ; •••••.••••• , ••••••• 501 LIGHTJNG FIXTURES, Drive-up, Walk-up (Coin Collector) ••••.•••• 508 Booth .•...•••••.. , • • • • • • • • • • . • • . • • • . . • . • • • • 508 Key •.•.•.••••.•.••••••••••••••••••••••••••• 512 Other ••...•••••••..••.••••••.•••••..•••.••• 065 MULTIPLE WIRE TRANSMISSION DATA ...... 304 LJNE CONCENTRATORS • . . • • . • • • • • • . • • . • . • • • • . • • • • 06"( MULTISTATION SYSTEMS ....••••..•...•...•.•••• , 310 LJNE CONCENTRATORS (Outside Plant) •.•..•.•••. 639 LINE SWITCHING SERVICE (DATA SYSTEMS) ••.•..•. 591 N LINE-UP OF GROUPS IN TANDEM- (J, K and L Type Carrier) . • • . . . . • . • • • . • . • . • . • . . • . • • . • . 356 NETWORKS, LOUDSPEAKER CONFERENCE SERVICE .•••.•••••••.•• 512 Line Building Out ...... •• 332 LOUDSPEAKER SETS .••••..••..••.••...•••..•• , •. 463 Terminating ...... •... 103 LUBRICANTS . . • ...... • . . . • . . • . . . . • • . • • 065 Test ...... •...•...... •..... 103 NIGHTLIGHT TELEPHONE SETS ••.••••••••••••••••• 502 NOISE AND MODULATION TESTS - (J, K and M L Type Carrier) • . • • • . . • . . . . • • • . . • . . . . • . • . • . • 356 NOISE MEASUREMENTS, Off-Premises Station Lines ••.•..••••..••••• 331 MAGNETIC REPERTORY DIALER ···••••••••••••••••• 512 PBX Central Office Trunks • • • • • • • • • • • • • • • • • • 331 MAINTENANCE CENTER Tie Trunks . • . . • • • • • • • . . • . . • . • . . • • • • • . • . • • • • 331 Ll and L3 Type Carrier . . . • . • ...... • . • . . • . . 360 Two-Wire Subscriber Loops .•••••••••••••••.• 331 N, 0, and ON Type Carrier ...... ••.•..•.. 361 NOISE MEASURING SETS ••••.•...•. , . . . . . • • ...... 103 TD-2 Microwave Radio ...... 410 NON-WESTERN ELECTRIC MICROWAVE RADIO ..••....• 408 TH Microwave Radio ••.••••••••••••••••.••••• 412 NUMBER CARDS AND STRIPS .••••.•••••.••.••••••. 501 MANHOLES· . . . . . • • • . • • . • . • • . . . . . • . • . . . . • . • • . . . . . 622 NUMBERING AND LETTERING ...... ••...... •..••. 069 MANUAL MOBILE RADIO .•...... •...... •.••.• 404 NUMBERING MACHJNE (Number Card) •.•••••••••.•. 080 MARITIME RADIO, NUMER~CAL JNDEXES, see INDEXES Coastal Harbor .•....•...... •.•..••..•.....• 403 High Seas •.•...•...... •....••.•••.•..••.• , 403 0 Overseas ...... •..•...•..••..•..•...•. , 403 VHF Maritime .•....•...... •••.•••..•.••• 404 OILS ...... •...... 065 MASTER ALPHABETICAL INDEX, Plant Series ....•. 000 OFF-THE AIR TV PICK-UP ...... 408 MASTER NUMERICAL INDEX, Plant Series ...... •.. 000 OSCILLATORS MATERIALS, Radio ...•...... •...... •...... •.. 104 Customer Equipment ...... •...... •.•...•• 080 Other .•.••..•.•..••...•...... •.....•... 103 Outside Plant ...... •...... •.•..... 081 OSCILLOSCOPES Power ...... •.•.•••••.. 065 Radio ••..••..••..•••....•••...... •...... • 104 MECHANIC4L PROTECTION (Wire and Cable) ..•••.• 461 Video ...... •...... 103 MESSAGE WAITJNG LAMPS ..••••...... •..••••..•• 502 Other ...... •...... 100 MESSAGE WAITING SERVICE (Customer Equipment) . 473 OPEN WIRE PROGRAM SYSTEM •••..••..••••.•.••••. 320 METER PANELS (Cable Pressure Systems) •...... 637 OPEN WIRE TRANSMISSION DATA ...... 304 METERS OPERATOR CHAIRS ...... •.•.•.•• 065 Catalogue Information .•..••...... •...... • 084 OPERATOR TRAINING EQUIPMENT ...... 201 Common Usage - Maintenance, Selection and ORDER TURRETS- (Customer Equipment) ••....•.• 475 Use ...... •.••...•. 100 ORDER WIRE SYSTE!IJS, Power ...... •...... 102 General Description ...... 951 Radio ...... •...... 104 Other ...... 201 Switching Systems ...... •...... 102 ORDERJNG INFORMATION- BSP's ..•••••.•••••••.• 000 './ METHODS, OUTDOOR WAVEGUIDE ...... , • . . . . 402 General (Includes First Aid, Rescue, Fire OUTSIDE PLANT, GENERAL ...... •.....•.•••.•... 620 Fighting, Safety Precautions, Restriction OUTWARD STATION REMOVAL PROCEDURES ...... 680 of Plant Activities, Radiation, Miscel OVERSEAS RADIO ...... 403 laeous Records and Reports, DDD Notes, p ISC Pl~, Engineering Complaints) ...... 010 Miscellaneous PACKAGJNG AND HANDLING (Station Apparatus) 500 (Includes Blocking and Insulating; Cabling, PADS, Wiring, Skinning and Connecting; Cleaning, Friction, KS-8035 ...•.•••••••••••••.•••.••. 502 Treating, and Reconditioning Apparatus and Headband ••••....•.••..•••.•.•••••••••••••.• 028 Equipment) ...... 069 PANEL OFFICES, Equipment Design Requirements ...... • 815 Page 6 Other ...... 215 PARTY LINE INTERFERENCE, PREVENTION OF •.••••• 502 SECTION 000-000-001 PASSIVE RADIO REFLECTORS ...... 402 PATCHING BAYS- Carrier Systems ...•.••...•... 356 PRIVATE SERVICE SYSTEMS, PBX SWITCHED LONG HAUL TIE LINES ••••.••...•.• 310 General Description ...... •...... 982 PBX - See Private Branch Exchange Test Center Operation ...... • 660 PERFORATORS, . Other ...... 480 Cleaning ...... 069 PROGRAM DOCUMENTATION STANDARDS, EDP ••...••.• 007 Maintenance ...... 034 PROGRAM TRANSMISSION SYSTEMS AND SERVICES 320 PERSONAL SIGNALING SYSTEM NO. lA ("BELLBOY") PROTECTION, Central Office Equipment ...... 201 Electrical (Outside Plant and Station General Description ...... 975 Equipment) ...•...... ••...... •..•..... 638 Radio Equipment ...... •...... • 407 Mechanical (Station Wire and Cable) .....••. 461 Records and Forms ...... 400 Other Customer Equipment ...... •...... • 465 PHOTO PROCESSORS ...... •.... 030 PROTECTION SWITCHING TEST SETS •••.••.•....•.• 104 PILOT FILTER SET, J68858 ...... 103 PROTECTORS AND.MOUNTINGS ...•...... •...... •. 638 PILOT WIRE REGULATORS ..•....•.•...... •..•...• 332 PLANS Q '; Cable Trouble Analysis ...... 660 Construe tion ...... 680 QUADDED CABLE TRANSMISSION DATA ...... 304 Customer Trouble Report Analysis ...... 660 First Attempt Verbal Trouble Reporting .... . 660 R Private Services Analysis ...... 660 Private Services Results Measurement ...... 660 RACEWAYS AND CONDUIT (Customer Equipment) .... 461 Teletypewriter Station Trouble Analysis ... . 570 RADIATION ...... , ••....••.•• , , .. 010 Toll Service Results ...... · · · . · 660 RADIO, PLANT ASSIGNMENT Administration ...... 400 Customer ...... · ... · 680 Air-Ground ...... • . • ...... 406 Trunk Plant and Special Services ...... 682 Alphabetical Index ...... 400 PLUGS, Antennas ...... 402 Station Application ..•.••••.••..••.•.•...•• 461 BELLBOY 407 Other •...•.•...•••.••.• _..•••••••••••.• •. • · • 032 Coastal H~~b~~.: ::: :: :: : : : :: ::: :: :::::: ::::: 403 Cleaning ...... 069 Common Systems ...... 413 POLE CHANGERS .•...... •..•...•...... • · ·• · 163 EC and ED Emergency Point-To-Point ...... 403 POLE LINES ...... •...•...... · . . 621 Engineering . . . • ...... 940 POTENTIOMETERS ...... · · · . . 028 Federal Microwave ...... 408 POWER CABLE AND CORD ASSEMBLIES (Booths) ..... 508 High Seas ...... 403 POWER CORD PLUG RETAINER ...... •..•.. 167 Manual Mobile ...... 404 POWER- MISCELLANEOUS CIRCUITS AND EQUIPMENT·. 171 MJ Mobile ...... •...... •....•.....•..... 405 POWER PLANT MATERIAL ...... •...... 065 Motorola Microwave ...... 408 POWER PLANTS AND POWER SUPPLY ••...••..•.•...• 167 Non-Western Electric Microwave ..•...•.....• 408 POWER RELAY SETS ...... •..•...•...... •..• 463 Overseas ...... 403 PRESSURE SYSTEMS, RCA Microwave ...... •...... •...... 408 Cable ...... •.• 637 Records and Forms ...... 400 PREWIRING (High Rise Apartments) ...... •..•... 461 Reflectors, Passive ...... 402 PRIMARY ALERTING SYSTEM (SAC) ...•...... •..... 310 REL Microwave ...... 408 PRINTERS, TAPE ...... • 030 Test Equipment .•...... •...... • 104 PRIVATE BRANCH EXCHANGES, TD-2 Microwave ...... 410 Common Information TD-3 Microwave ...... • . . . . . 411 All PBXs ...... • • . • . . . . • . . . . . • • . . . • . . • . . . 534 TE Microwave •.••..•.•.•.•.••...••..•.•....• 409 500 and 600 Series • . . • • • . . • . . • • • . . • . . • • • • . 534 TH Microwave ...•...... ••.•.•....•• 412 700 Series ...... ••..•..•..••..• ·, . . • • . • • • • 540 TJ Microwave ...... ••...•..•...... •••••...•. 409 General Descriptive TL and TL-2 Microwave •...... 409 All PBXs • ...... • • ...... • • • . • • . . . . . • . • 981 'IM-1 Microwave ...... •..• 409 Specific Information Transmission Lines .....•.•...... •...•.•.•. 402 500 Series (except 508 and 520) •.••..•.... 536 TV Off-The-Air ...... , ..•..... , ...... 408 508A- (Dispatching Service) •.••...... •. 473 VHF Maritime •••• 0 ••• 0 ••• 0 •••••••••• 0. 0 0 •• 0. 404 520-Type- (Emergency Reporting System) ... 473 Waveguide, Outdoor ...•...... 402 600 Series . : ...... • . • ...... • • . . • . • . • . • 538 RADIO FREQUENCY SUPPRESSION FILTERS 700C ..•...... •..•••...... •..•.•...... • 541 (Station) ...... •...... 501 70l..,Type . . . . • . . • ...... • . . . . . • . • • . • • . . • . . . 542 RADIO MULTIPLEX POINTS 702A •..•...... •...••..•...••.••.•.•.•....• 543 ON/Radio Systems ...... •...... •...•... 362 710C .•...... •...... •.... 541 RADIO PROGRAM CIRCUITS ...... • 320 711-Type . • . • • . . . . . • ...... • . • . • ...... 542 RANGE CHARTS (Private Branch Exchange) ...••. 534 740-Type ...... •...... •...... 546 RAPIDIAL .... , •...... •...... , ....•..•.•... , 512 750A ...... 548 RCA MICROWAVE RADIO ...... , .... , ...... •... , 408 755A ...... •...... •. 550 READERS ...... • ...... • . . . . • . . . . • . . . . . • 0 34 756A ...... •..... 551 RECEIVERS, , 757A ...... ••.•...•...... • 551 Bone Conduction ...... •.•....•.•.••••.•... 501 758A, B and C ...... 551 Data Set 594 Door Answ~~i~g· ..•...... •...... ' ..... · 512

761A ..•..•...... 551 ••••••• 0 ••••••••• •••••••••••• 800 Series ...... 553 Dual Channel ...... 179 PRIVATE LINE CONFERENCE CIRCUITS ...... 201 Head Set 028 PRIVATE LINE TELEGRAPH SYSTEMS AND SERVICES .. 312 Mu 1 t ifreq~~~~y· ..•.... ' ... ' ..•...• • ... ' . ' ... ' 179 •• 0 •••• 0 0 ••••• 0 0 0 ••••••••• 0 •• PRIVATE LINE TELEPHONE SYSTEMS AND SERVICES •. 310 Station ...... •.•...... •.....••••.•.. 501 PRIVATE LINE TELETYPEWRITER SERVICES •...... 571 Page 7

l_ SECTION 000-000-001

RECONDITIONING APPARATUS •••...•.....•.•.•.... 069 SELECTIVE CALLING SYSTEMS RECORDED TELEPHONE DICTATION TRUNK - lA High Speed • • • . • . . . • . • • . • • . • . • • • • • • • • • • • • 592 (Customer Equipment) SAl and 8Bl, Data ...... 581 General Descriptive •...... •.•..•...... •. , 981 83B3 .•....••....•.•...•...•.....•...... ••• 581 Equipment ••...... •...... •...... •...... • 473 SELECTIVE CONTROL SYSTEM ....•.•.....•.•.•.... 310 RECORDER CONNECTORS .....•...•...•...... • 463 SELECTIVE SIGNALING SYSTEMS, RECORDER COUPLERS ...•.••.•.•.•.....•..•...... 463 General Description ...... 982 RECORDERS AND RECORDER-REPRODUCERS Other ...... 480 General Description ...... 951 SELECTOR CONSOLES • ...... • . . • . . • ...... • . . . . • 504 Other ...... 034 SELECTORS .....•...... , . . • . . . . • ...... 026 RECORDERS - TRAFFIC AND CONCENTRATOR SERVICE CENTER TESTS, TRUNK USAGE, Type N, 0, and ON Carrier ...... •...... • 361 General Description ...... 951 SERVICE OBSERVING DESKS Other ...... • ...... 201 & 252 General Description ...•....•.•..••....••••. 953 RECORDS AND FORMS-RADIO ...... •...... 400 Other •..•...... •.....•...•.•....•••.•.....• 210 RECTIFIERS . . . . . • ...... • ...... • ...... 169 SERVICEBOARDS, TELEGRAPH ...... • 666 REFLECTION LOSS DATA ...... •...... • 304 SHELVES, BOOTH AND DIRECTORY •.....•.•.••.••.. 508 REFLECTORS, PASSIVE RADIO ...... •...... 402 SIGNAL GENERATORS (Radio) •••...••....••...... 104 REGENERATIVE REPEATERS ...... •...•• 034 SIGNALING AND CONTROL SYSTEMS, REGENERATORS ...... • . . • ...... • . . . . • • 034 Description ...... 981 REGISTERS ...... 030 Other ...... 480 REGULATORS, SIGNALING EQUIPMENT AND SYSTEMS Speed ...... 024 Compatibility Information ...... 179 Vol ta~e . • ...... • . . . . . 024 Equipment ...... • ...... • ...... • . 179 RELAYS, General Description ...... •...... •. 975 Coin •...... •...... ••.••....•..•.•• 506 SIGNALS ...... •...... •...... •. 032 Other ...•...... 040 SIGNS, PUBLIC TELEPHONE •...... •.....•...• 508 REL MICROWAVE RADIO ...... 408 SINGING POINT TEST SET .....•....••••.•...•••. 103 REPEATERS SINGLE SIDEBAND PROGRAM SYSTEMS •..••..•••••.• 320 Test Sets SKINNING CROSS CONNECTION WIRE ...... 069 2G .....•...... •.•.....•••...•...... • 103 SOCKETS . . . . • . • • • . . . . • • ...... 032 12F, E Repeater ..•..••...•..••..•.•..•..•• 103 SOLDERED CONNECTIONS, MAKING AND Type N, 0 and ON Carrier Systems REMOVING . . • . . . • . • ...... 069 Repeatered High-Frequency Line .•.•..•.•... 362 SOUNDERS .....••...... •...... •. 028 Voice Frequency SPEAKERPHONE SYSTEMS ...... •.••.....• 512 Compatibility Information ...... •...... •.. 179 SPECIAL MULTISTATION SYSTEMS •.....•...... •• 310 22 and 44 Type . . . . • • . . . . . • . • . . . . . • • . • • . • . . 332 SPECIAL SAFEGUARDING MEASURES (SSM) ...•...... 460 E Type ...... •..•...•..•.•.•....•.•.. • 332 SPECIAL SERVICE PROTECTION (SSP) ....•.....••. 460 v Type .•....••.••.•....•••.••••.•.•.••••.• 332 SPECIAL SERVICES - Customers' Premises Line Building Out Networks •.•.•....••..... 332 (General Descriptive) ...... 981 REQUIREMENTS, GENERAL - (Divisions 020 to SPECIFICATIONS ...... 005 179) •...... •...... •...... ••.••.•... 020 SPEED REDUCTION UNITS • . • • ...... • ...... • . • . . 161 REQUIREMENT TABLES ...... · 005 SPLICING RESCUE PROCEDURES . • . . • ...... • . • . . . . . • • 010 Cable ••.•...•...... •....•.....•..••.•. 632 RESISTORS ...... · · . · · · · • · 032 Tl Carrier .•...•...... •...... •. 365 RESTRICTION OF PLANT ACTIVITIES DURING EVENTS STAMPING (Lettering and Numbering) ...... 069 OF NATIONAL INTEREST, WELFARE OR EMERGENCY . 010 STANDING ORDERS FOR BSP's ...•.•...•••.....•.• 000 RETURN LOSS DATA ...... •...... •....• 304 STARTERS ...... • ...... 026 RETURN LOSS TEST SET ...... •....••..•••.••••. 103 STATION APPARATUS AND EQUIPMENT INTENDED RHEOSTA'I!: ...... 028 SOLELY FOR SPECIALLY-ENGINEERED LINE3 - RINGERS ...... 028 NOT FOR GENERAL TELEPHONE USE ...... • 529 RINGING FEEDERS- (Customer Equipment) ..•.... 460 STEP-BY-STEP OFFICES RINGING MACHINES ...... •..• 163 General Description ...... ••..••.•. 955 RODS, TRIP ...... •...•...... 026 Equipment Design Requirements ...... 814 RURAL DISTRIBUTION WIRE TRANSMISSION DATA 304 Equipment Common to More Than One Type ·-...-/· Step-by-Step or Community Dial Office ..... 226 s General and Testing Information Applying to Intertoll Dialing, CAMA, AMA and ANI ...••. 227 SAC- PRIMARY ALERTING SYSTEM ...... 310 T~sting Information Applying to Specific SAFETY PRECAUTIONS (Covering Radio, TV and Step-by-Step and Community Dial Offices ..• 225 Carrier Equipment, Cathode Ray Tubes, Flor STORED PROGRAM CONTROL . . . . . • . . . • ...... 254 escent Lamps, Ladders and Ladder Seats) ..... 010 STRATEGIC Affi COMMAND PRIMARY ALERTING SYSTEM. 310 SAGE (Station Equipment) •.•...... •. 480 SUBMASTER AND MASTER GROUP EQUIPMENT - SAGE DATA TRANSMISSION SYSTEMS .•...... •.. 314 ( L Type Carrier) ...... • . . • ...... 356 SCAN (Switched Circuit Automatic Network) .... 310 SUBSCRIBER SETS, SCHOOL-TO;HOME INTERCOMMUNICATING SYSTEM ..... 512 Common Battery Station Sets ...... •...• 502 SECRETARIAL SERVICE - (Customer Equipment) Common Battery Coin Collectors ...... •..... 506 Concentrator Equipment ...... •.. 067 Local Battery Station and Coin Sets ....•... 508 Concentrator-Identifier System (General SUPERGROUP CONNECTOR- (Ll Type Carrier) ..•.. 356 Descriptive) ...... 951 SUPERVISOR CHAIRS ...•...... 065 Switchboard Equipment .....•...•...... 536 SUPPLEMENTAL INFORMATION- CENTRAL OFFICES ... 201 Page 8 SECTION 000-000-001

SUPPLIES Controls .•..•••.••.••..•.•••..•••••.••••••• 742 Panel Distribution ••.•••••...••••..•.•.•••••••..• 744 Equipment Design Requirements .•....•.•.•• 815 Functions- Miscellaneous ••.••.••••.....•.• 746 Other ...... •...... •..•...... •..•• 215 General Information •.••••••••••.••••.•••••• 740 Step-by-Step and Community Dial Material Returns •••.•.•....•.•••.•••.••..•• 745 Equipment Design Requirements ...... •• 814 Ordering •.••••...•••••••..••.••••.•.••.•••• 743 General Description .• . .• .. . . • • • • • • • • • • . • 955 Supporting Functions •••••...••••..•....•.•• 741 Equipment Common to More Than One Type SWEEP TESTING, step-by-Step or Community Dial Office ••• 226 Exchange Cable Pairs ...... •.•.....•.... 330 General and Testing Information Applying SWITCHBOARD EQUIPMENT, MISCELLANEOUS, to Intertoll Dialing, CAMA, AMA, ANI CENTRAL OFFICE ...... 201 and Common Control ..•.....•...... •... 227 SWITCH PANELS .•...... • 030 Testing Information Applying to Specific SWITCHED CIRCUIT AUTOMATIC NETWORK (SCAN) •.•. 310 Step-by-Step and Community Dial Offices . 225 SWITCHED SERVICES NETWORKS ..•.••.•....•.•.••. 310 Tandem Crossbar -1 SWITCHES, General Description ...•...... •...•.....•. 960 Magnetic .•....•.•..••..•....•.•••••..•••••• 026 Equipment Design Requirements .....•...... 817 Other •.••.•....•.••.•.•.•....•.••..•.....•. 030 Other ...... •.....•...... ••.... 220 SWITCHING EQUIPMENT FOR PROGRAM SYSTEMS 320 SYMBOLS (Schematic) ..•...... •...... •.•..•.•.• 005 SWITCHING SYSTEMS Automatic Protection (Radio) - See Automatic Protection Switching Crossbar Tandem T Equipment Design Requirements .••...•...... 817 General Description ..••.....•...... 960 Other ...•....•...... •.•.•....•.• •. • · · · · · · · 220 TAPE PRINTERS ...... , 030 Electronic Switching Systems, TAPE REELS AND REELER ...... •.....•. 034 No. 1, TD-2 MICROWAVE RADIO ...... •.•...••...... •. 410 General Description ...... 966 TD-3 MICROWAVE RADIO ...... 411 Other ...... •.••....•...... • • • · • · · • · 231 TE MICROWAVE RADIO .... , •.• , , ....••. ..., , . • . • . 409 No. 2, TELEGRAPH SYSTEMS ..• . . • . • . • • . . . • . . • • • . . . • . • . 312 General Description ...... •...... 966 TELEGRAPH TESTBOARDS, - See TESTBOARDS Other ...... •...... •.•... 232 -TELEGRAPH TEST SETS ••• , . , .••..• , .... , ..• , ..•. 103 No. 101, TELEPHONE ANSWERING SETS ..•...•.•.•....•...•. 514 General Description ...... 966 TELEPHONE ANSWERING SYSTEMS, Other ....•.•..•..•....•....•...... •. 240 General Description .• ...... • ...... 981 No. 1 Accounting Center, Other ...... •..•...•.•... 473 General Description •.•....•...•.....•..•. 968 TELEPHONE CONSOLES ..• .. . • • . • . . • ...... • . . • . 504 Other ...... •..••....•••••••..•..•...... 213 TELEPHONE REPEATER TEST SETS (Voice No. 1, 3, 5 and 6 Toll Offices and No. 1, Frequency) •..•.•...... •••....•.•.•.•...•.. 103 3, 5 and 6 Toll Switchboards ...•..•.•...•. 211 TELEPHONE SETS, No. 4A and 4M Toll Switching Systems, Attendant and Operator ...... •...•..•...... 028 Equipment Design Requirements ...... 818 . Components ...... 501 General Description ...•.••..••..•...•..•. 964 Station •.•...••...... •...... •.....•.. 502 Other 212 .••...... ••.•••.••••..... · .. · .. TELEPHOTOGRAPHY ...... • ...... • ...... 314 No. 300, TELEPHONE WARNING SYSTEMS General Description •.•.•..••.••..•.••••.. 981 General Description ...... 981 Other •...... •...•.•....•..•.•.....•..... 480 Other ...... •...... 480 No. 305, TELERAPID AUTOMATIC DIALERS ...... •.••• 512 General Description .•••••.•••...... •.•••. 981 TELETRAINERS .•...... •...... •. ., . .• . • • . . . • . . 473 Other ••••.•.•..•..••.•.•...••....•....•.• 480 TELETYPEWRITER No. 307, Codes, Selecting .•...•.....•..•....••.•••.. 570 Data Equipment ••••.••••..•...••..•.••.... 592 Converters, Station •...•...... •...•••....•. 570 General Description ....•...... •..... 981 General Information, Miscellaneous Apparatus Switching Equipment .••....•....•....•.••. 480 and Auxiliary Equipment ..•...... 570 No. 309 (Autovon) Motor Units ..••.•...... •...... •••...•• 570 General Description ...... •...•••.••••...• 981 Private Line Services . • . • . • • . • . • . . . • . . . . • . 571 No. 400, Selective Calling Systems .••...... •...••. 581 General Description ••.••••••••.....•..•.. 981 Switching Systems ...... ••••.•..•.....•.•• 580 Other •...•..••..•..•••.•.•...... 518 Tape Splicers .••••.•...... •.•.•..•.•.••. 570 No. 1 Crossbar Tolls and Maintenance Supplies ...... 570 Equipment Design Requirements ...... 816 Winders, Unwinders, Rewinders .•.••••..••.•. 570 General Description •.••..•.....•...... 957 14, 15, 19 and 20 Types ...... 572 Other ••....•.••••...••.•..•....•....••.•• 216 28 Type •..•.•..••...... •.•.....•••••.•••.. 573 No. 5 Crossbar 30 Series ...... 57 4 , Equipment Design Requirements •••.••.....• 819 TELETYPEWRITER SWITCHBOARD NO. 6A ...... 211 General Description ..•. , •.....••. , ....••• 958 TELETYPEWRITER TEST SETS, Other ..•••.•...... •.•..•..••..•.•..... 218 Data Application .....•...... •••.•.....•.. 107 Other •..•...... •...... •....•.....••..••.• 103

Page 9 SECTION 000-000-001 TESTBOARDS, TWX lOA ..•...... •••.•..•...... 666 TELEVISION SYSTEMS, lOB ..•...... ••.•...... •.. 666 A2 Video Transmission System and lOC •...... ••....•.•..••...... •.•.. 666 Associated Equipment Units ...•••.•.•••.••• 318 17B .....•...... 666 A2A Video Transmission System and 20A ...•...... ••..... , ....•...... 666 Associated Equipment Units •.••••••.•...••. 318 TH MICROWAVE RADIO .•••••.•.•.••.••.•..••• , ••• 412 Closed Circuit (Outside Plant) •••••..•.•..• 641 THERMISTORS • ...... • • . • . . . • . • • . • • . • • . . . . . • • • 032 Coaxial Cable Television Transmission TICKETERS ...... •...•...... •..•....•.••• 030 Systems - RF TYPe ...•.•...•..•...•..•••... 318 TIMERS ...... •.•.•.•..•.•.•...••.•..•..•• 030 Descriptive Informa+,ion- General .•....•.•. 318 TIME STAMP . .• . . . . • . • . • . • . • ...... • . • . • • . • • • 030 J44107 Television Operating Centers TIMING CIRCUITS ...... •..••...... 201 and Associated Equipment Units ••••.••••••• 318 TJ MICROWAVE RADIO . . • • . • • • . • • • • . • . • • . • . • . • . 409 Local Video Channels and Services .•••.••... 318 TL MICROWAVE RADIO ..•..••.••••••.••••.•.•.•.• 409 Off-the-air Pick-up Receivers ••..•.•..••..• 408 TM MICROWAVE RADIO .••••••..•....•..•.•••....• 409 Over-all Line-up of Video Facilities •.••••• 318 TOLL CABLE TRANSMISSION DATA ..•...... 304 TELEVISION TEST SETS .••....•....•.••••..••••• 103 TOLL CONFERENCE GROUPING CIRCUITS .••••••...•• 332 TERMINAL BLOCKS • . . • • . • • . . • • • • • . • • • • • • • • • . . • • 461 TONE ALTERNATORS AND TONE MACHINES •••••••.••• 155 TERMINAL EQUIPMENT COMPONENTS - TONE SUPPLY CIRCUITS ...... • . . . . • . . . • ...... 201 (L Type Carrier) ...... •...... •.••.•.•... 356 TOOLS (N, Nl, N2, N3, 0 and ON Type Carriers) ••.• 362 Catalogue Information •••...•.•..•.•..•...•• 074 TERM,;rNAL STRIPS (Distributing Frames) •••.••.. 069 Common Usa~e - Maintenance, Selection and TERMINALS, CABLE •....••...•.•..•.••..••.•..•• 631 Use .•..••..•.•...•...•.•••.••.••....•.•.•• 075 TERMINATING ARRANGEMENTS - (J, K and Customer Equipment ....•.•.•....•...... 080 L Type Carrier) • . . .• . . • • • ...... • • • . . . . . 356 Outside Plant • . • • • • . • • . . . . • . • . • • . • • . • . • • • • • 081 TERMINATING SETS, 4-WIRE .•.•...••..••...•.... 332 Station Equipment .•.•••...•.•....•••..•••.. 080 TERMINATIONS, MAIN FRAMES ...... •...•..•.•.••• 636 Switching Systems and Power - Maintenance, TEST CABINETS-LOCAL ...... 662 Selection and Use •.•••••...... •.••.•••• 076 TEST CALLS-CREDITING CHARGES .....••.•.•..•..• 010 TOTALIZER, TEST CENTER OPERATION General Description ...... 951 Cable and Open Wire Plant- Maintenance .•.• 660 Other ...... •...... •..... 201 Customer Telephone Station and Lines .•....• 660 TRAFFIC DATA PROCESSORS Private Services ...... •...... 660 General Description ...... 951 & 984 Trunk Maintenance ...... •...... •...... 660 Other ...... 252 TEST CONNECTIONS TO APPARATUS .•.....••..••... 069 TRAFFIC MANAGEMENT SYSTEMS TEST DESKS General Description ...... 984 Cable ...... •...... 662 Other ...... •..•.. , •.....•..•.... 252 Local ...... • 662 TRAFFIC MEASURING SETS ...•...... •...•... 201 TEST EQUIPMENT, TRAFFIC SERVICE SYSTEMS Common'Usage - Maintenance, Selection and General Description ...... •...... • 91:34 Use (Includes Test Sets for Timing, Pulsing, Other ..•....•.....•....•...... •...... 250 Signaling, Electron Tubes, and Miscellaneous TRAFFIC USAGE RECORDER, Common Applications; Dial Testers, Test General Description .....•...... •...... • 951 Panels, Electrical Indicating Instruments, Other ..••..•.•...... •...... 201 Meters, Oscilloscopes, Oscillographs and TRANSFORMERS, STATION ..••....•.•.•.••.••••••• 501 Wheatstone Brid~es) ...... •.•.•.•..•.•.. 100 TRANSISTOR • . . • . • . • ...... • • . . . • . • . .• ...... 032 Customer Equipment ...... •.•••.•.••••• 105 TRANSLATOR •.•...... •.•...... ••...•....•... 034 Data Systems ••••.••....•...•••.....••.•••.. 107 TRANSMISSION AND CIRCUIT ORDER TESTING •.••.•. 331 Outside Plant •..•.•...•...•.•..•.•.••.....• 106 TRANSMISSION DATA ...... • ...... 304 PBX ..•...•.••.•••.•..•.•..••.•.••..••..•••• 105 TRANSMISSION ENGINEERING AND DATA Radio •..•...... •..•.••.•..•....•..••. 104 Corro.sion Practices ...... 877 Stations ...... •..•..•....•..•.••••••.• 105 Protection Practices • ...... • .• ...... 1:376 Switchrhg Systems and Power - Maintenance, TRANSMISSION LINES, RADIO ••••.....•...... •. 402 Selection and Use ..•...... •..•...... •••• 102 TRANSMISSION MEASURING SETS •.•••..•.••...... • 103 Telegraph .•...••.•....•.•...•.•.•....•.••.• 103 TRANSMISSION MEASURING SYSTEMS •...... •.•• 103 Teletypewriter, TRANSMISSION PER~~RMANCE MEASUREMENT Data Application ..•.••.•.••••..•.•.••.•.. 107 PLANS •...... •...... •...... • 301 Other ••...... ••...•.•..••••••...••.•••.•• 103 TRANSMISSION SYSTEMS, Transmission ...... •..•.. 103 Compatibllity Information ...... •....•...... 179 TEST UNIT, 2A TOLL .. . . • . • • . • . • . . . . • . . • . • • . 103 General Description ...•.•..•..•.•.....•.... 970 TESTBOARDS AND TEST POSITIONS FOR SPECIAL TRANSMISSION ZONING, STATION .•••.•.••..•.•••. 500 SERVICES TRANSMITTER TRANSFER UNIT - (Customer 17E ...... • 666 Equipment) ••. , .... , ..••.•••••...•...•.•.•..• 473 l9A ...... 666 TRANSMITTERS, 21A ...... •. 666 Headset .....••.••.•.•.••••••.•.•••••••••••• 028 Telegraph ...... •...... 666 Speakerphone ..•.•.•.•.•.••••...•••••••••••• 512 TESTBOARDS FOR OTHER THAN SPECIAL SERVICES Station ....•...•••.•••.• , •••.•• , ••.•.•••••• 501 17B ...... •...... •...•...... • 664 TREATING APPARATUS ...... •••.•.••••..•..... 069 17C ... ,#, ••••••••••••••••••••••••••••••••••• 664 TRIP RODS .•...... •.••••...•.....•...••...• 026 18B ..•...... •...... •...... •... 664 TROUBLE LOCATION Exchange Cable Pairs ...... •.•...... 330 Page 10 SECTION 000-000-001 TROUBLE RECORDERS - See Perforators TROUBLE REPORTS-CUSTOMER •...... •.....•• 660 TRUNK MAINTENANCE ...•••••...•••...... • 660 w TUBE COOLING SYSTEMS ••••••.•••••..•• • • • • • • • • · 161 TWO-POINT PRIVATE LINE TELEPHONE CmCUITS •... 310 TWX (Dial) . • • • . . . • • • • • . • • . • • . • • . • . • . . • • . • . . • • 591 TWX AND DATA SYSTEMS (General Descriptive) ••. 972 TWX SUBSCRIBER LINES (DIAL TWX) .••..•...... • 314 WALK-UP PUBLIC TELEPHONE •.•••••••••••.•.••••• 508 TWX TESTBOARDS ...... •....• 666 WARNING SYSTEMS, TELEPHONE - See Telephone TYPE K BRANCHING ARRANGEMENTS FOR PROGRAM Warning Systems SYSTEMS • • . • • • • • • • • • • • • . • • • • • • • • • • • • • • • • • . • • • 320 WASHING •....•..•...•...••..•...... , ...... 069 TYPE Ll GROUP BRANCHING AND BRIDGING ARRANGE WATER DAMAGE v MENTS FOR PROGRAM SYSTEMS ••••.....•••••...•• 320 Power Plant Reconditioning ....•.•.....•...• 167 WAVEGUIDE, OUTDOOR •..•...... •.••••.....•.•.. 402 WAVEGUIDE PRESSURE SYSTEMS .•.•.••••••••..•.•. 161 J WESTERN UNION CONTRACTS •.••••••••••.••••.••.• 312 u WHEATSTONE BRIDGES •.•..•••••.••...•.•.•.•...• 100 WIDE BAND DATA TRANSMISSION SYSTEM ..•..•.•••. 314 WIDE BAND LOOP REPEATER .•....•.•..••••••....• 314 WIRE, UPKEEP WORK UNITS . . . . • ...... • . . • . . 015 Buried •.••.•••••.••••••••.•••••••.••••..••. 629 URBAN WIRE TRANSMISSION DATA •...... • 304 Drop and Block • • • . . • . • • • . . • • • • . . . . • • • • • • • . . 462 Inside •.••.••••••••..•.•••..••...•.••.•...• 461 Multiple Line •••••.••...•..•.••....•.••.•.. 624 Open •....•••..••••••••••••••••••••••••••••• 623 v WIRE LINE ENTRANCE LINKS - (Radio and Carrier Systems) ...... • ...... • 357 Type A- TD2 Radio Systems •.••...•....•.••. 357 - TJ Radio Systems ...••.....•..•..•. 357 VACUUM TUBE MICROPHONIC NOISE TESTS •.•..•.•.• 320 TL2 Radio Systems •••.•••.•••••...• 357 VARISTORS ...... ••...... ••...... · · • · . 032 TMl Radio Systems ••.••..•••.•...•• 357 VAULTS, -Basic Message Connecting Link •.... 357 Cable ...... •••...... •..•....••...... 622 Type B- TD2 Radio Systems ....•..•....•.•.• 357 VEHICLES, MOTOR ...... •.....••...•....•...... 720 - TJ Radio Systems •.•....•.••.•....• 357 VENTILATING EQUIPMENT ••••••••.••••••..••.••.• 161 Type C- TD2 Radio and Ll Carrier ••.•••.... 357 VENTILATORS, BOOTH • • . • • • . • • • • • • • • • • . . • • • • • • • • 508 Type TH- Radio and Ll Carrier Facilities •. 357 VHF MARITIME RADIO ...... 404 Type TL- Radio Message Connecting Link •••• 357 VIDEO TEST SETS ••.•.•••• 1 • • • • • • • • • • • • • • • • • • • • 103 WIRED MUSIC CmCUITS •.....•...•..•..•.••.••.• 320 VISUAL DELAY TEST SETS •••••.••.•••.•.••..•.•• 104 WIRING, VOICE CONTROLLED SWITCH •••••••••••••••••••••• 463 Customer Equipment •....•..•..••.•••••••••.• 461 VOICE FREQUENCY TRANSMISSION MEASURING SETS .• 103 Drop and Block (Outside Plant) .•.•...... 462 VOLUME INDICATORS ••••••••••••••••••.•..•.•••. 320 WORK UNITS ...... • ...... 015 VOLUME LIMITER FOR SPECIAL SERVICES ••••.••..• 310 WRAPPED CONNECTIONS ...... •.•..••...... 069

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