PRACTICES SECTION 000-000-001 Issue October Plant Series 14, , 1964 AT&TCo Standard MASTER ALPHABETICAL INDEX

( ALL DIVISIONS

1. GENERAL BELL SYSTEM PRACTICES

General Plar1 ...... •...... O�JO

l.Ol This section provLles an alphabeticillly Ordering Information ...... •...... OCJO arranged list of the subjects covered in all "BELLBOY" Prac- ( divisions of the Plant Series of Bell System Central Office Equipment ...... 201 tices. General Description ...... 97S BELLS,

A Station Application ...... •..••...•... 501 Other ...... 028

Al DIGITAL DATA TEANSMISSION SYSTEI� ...... 314 BLOCKING, APPARATUS ...... •...... 069

ABBREVIATIONS ...... 005 BLOCKWIRE ...... • . . . . . • • . . • . . 462

ACCOUNTING CENTER NO. l, BONLING ...... •...•....•...... •...... 638

. 968 General Description ...... BOOTHS ...... •.•...... S08 Other ...... 213 BRIDGES,

ADMINISTRATIVE INFORMATION, Composite Set ....•...... ••.• 103

•• • •••••••••••••••••••• 0. 0 0 • • 201 ( Central Office Imped'lnce ...... •...... •...... 103 Customer Equipment ...... BRUSHES,

...... •...... AIR DRYERS ...... Commutator ...... 026 ALARM CONTROL SYSTEMS, Multiple ....00 00 0000 .. 00oo 00 0000 0000. 00 0000 026 l General Description ...... 9S BUILCINGS

Other ...... 201 Engineering ... ..•.....••..•...... •...... •.. 760 ALPHABETICAL INDEXES, see INDEXES Operation ...... •.•.....•.•...... •...•..•.. 770 l ALTEENATORS AN::l ENGINE AL '::'EHNAIOES ...... • S5 BUZZEHS,

AMA TAPE REEL ...... 034 Station Application ...... •.••. .••...... SOl

Al'V!PLIFIEHS Other ...... •...... •.....••.•...... 028 Apparatus ...... 024

General Inform ation ...... •.... 981 320 Program l2C and 14C .....•...... •..•.... c ANALOGUE DATA TRANSMISSION SYSTENS ...... 314

ANNOUNCEMENT SETS ...... Sl4 CABINETS (Equipment, Station Systems) .....•.. 463 ANNOUNCEJV,ENT SYSTEMS, C.�.BLE,

Central Office Equipment ...... 20 1 Aerial ...... •...... •.... ••.•..••.•.. 627 ( General Description ...... 9Sl Block ...... •...... ••.•.. .••••...... 627 Station Control Apparatus - SA & 9A ...... Slil Buried ...... •••...... ••...... 629 ANSWERING SETS AND SYSTEMS ...... Sl4 Cable and Open Wire Testing and Trouble APPARA'TUS BLANKS •...... •...... SOl Location Procedures ...... 330 APPARATUS MOUNTINGS ...... •... 463 Coaxial, Office - Splicing and Terminating . 069 ATTACJ:ll'I'.ENTS (Wire) ...... •...... 462 Completion Tests - Exchange-Area Cables .... 330 ATTENUATORS Electrical Testing and Identification ...... 634 104 Radio ...... •...... General ...... •••.••.•••••••• .•••.••••••.. 626 103 Other ...... House ...... •••••....•..... 627 AUTOMATIC CALL DISTRIBUTING SYSTE!�S - See Inside Wiring 0000 00 0000 .. 00. 00 0000 .. 00 00 .. 1161 CALL DISTHIBUTING SYSTENS Splice Closures ...... 633 AUTOio!JATIC DATA TEST CIRCUITS ...... 20'5 Splicir;g ...... 632

AUTO;vJATIC NUIII.BEE IDE!JTiFICAT:LO}l Su bmarine ...... ••..•.•••••••.•.•••.••••. 630

0000 00 00 00 00 .. 00 ..00 .. 9 l (Ger,eral Descriptive) S Switchboard - Cabling, Wiring, Skinning, AUTOMATIC PROTECTION SWITCHING Conr;ectir.g 069 (Microwave Hadio), Ur:::lergroun:J. 628

0000 00 00.. 00.. 0000 0000 lllO ( "One-for-Five" (TD-2) CABLE PROGRAM SYSTEM .....•...••...•..••...... 32 0 lOOA (11T\w-for-Ten11 - TD-3) ...... i;ll CABLE PRESSURE LEAK �ETECTOR CIRCUIT,

. �� )8 AUTOTF.ANSFOF.l\1ERS ...... A UTOJVIATIC ...... • • ...... 102

C•\BLE ...... PROTECTION ALARI�S ...... 201 B C!\BLING - (Customer Equipment) ...... 461

CALCULAGFAFH� ...... •...... 030 BACKBOARLS 463 CALL ANNOUIJCER :VIACHI?;E� ...... 161 BANKS, CALL DIRECTOR ...... • • ...... • . . 502 Panel Multiple, CALL :::ISTRIBUTING SYSTEJV:S (Customer Equipment), Cleaning ...... 069 General Descript:Con ...... 981 Requirements and Piece-Part Data ...... 026 No. lS ...... •...• 47S Step-by-Step Switch, (, No. 2A and 3A ...... • • . . • . • . . • • . . 476 Cleaning ...... 060 JALL TIMING SWITCH ...... •• 030 Requirements and Piece-Part Data ...... 030 .. CAr1EEAS ...... 030 BATTERIES, CAPACITORS, Associated With Power Flants and Station ..... Application ...... •..•...•.•.. 501 Power Supplies ...... 167 Other ...... •...... 032 Other ...... •...... lS7 ( C�\HRIER AliD P:LLOT SUPPLY - (J .• K ar,d BATTERY FEEDERS, L Type C'lrrier) ...... 3S6 Customer Equipment ...... 460 'jf\ERIER APPARATUS, (Outsi·ie Flilrt) 00 ...00 00 00 61!0 Distributing Frames (Central Office) ...... 069

Page 1 Printed in U.S.A. SECTION 000-000-001

CARRIER FREQUENCY TRANSMISSION MEASURING CCNII'AND POST ALERTING NE'NOF.K ( COPAN ) ...... 310

SETS ...... 103 COMPENSATING RESISTANCE - REVERTIVE AND

CARRIER PROGRAM SYSTEMS ...... 0 ••••••••••••••• 320 PCI PU LSING ...... 201 CARRIER SYSTEMS, COMMUNITY DIAL OFFICES See STEP-BY-STEP OFFICES Broad Band Carrier, Common Equipment COMMUTATOR BRUSHES ...... 026 ,,��•., Components ...... 356 COMMUTATORS ...... 026

Carrier and Pilot Supply ...... 356 COMPENSATORS ...... 026 Channel Banks ...... 356 COMPLAINTS, ENGINEERING ...... 010

Group Connecting Circuits ...... 356 COMPRESSORS AND COMPRESSOR-DEHYDRATORS ...... 161 Line-up of Groups in Tandem ...... 356 ( ) CONCENTRATORS General Descriptive ...... 951

Noise and Modulation Tests ...... 356 CONCENTRATORS, LINE ...... 067 ) ''' Patching Bays ...... 356 CONCENTRATORS, ( Outside Plant ) ...... 639

Submaster and . 356 Master Group Equipment .... CONCENTRATOR SYSTEMS - ( Customer Equipment ) .. 067

..... •o o ••••••••• 0 ••• 356 Supergroup Connector CONDENSED SECTIONS, see Particular Division Terminal Equipment Components ...... 0. o. 356 CONDUIT,

Terminating Arrangements . 0 ••••••••••••••• 356 Customer Premises ...... 461

C,H and Miscellaneous Types o•••••o••••o••o• 352 Outside Plant ...... 622

J Type ...... o •• 0 ••••••• 0. 0 ••••••• 0 •••• 354 CONFERENCE SET ...... 512

K Type .. o ••••••••••••••••••••••• o ••• o o o. o o. 355 CONNECTING ...... 069 Ll Type . o ••• 0 ••• o ••••••••••••••••••• o ••• o •• 358 . CONNECTING BLOCKS ...... 461 L3 Type .... o ••• o •••••••o ••••• o •••••••••••• 359 CONNECTORS ...... 032 Maintenance Center, ( ) CONNECTORS Outside Plant ...... 636 �) Ll and L3 Type ...... 0 ••• 360 CONNECTORS, SOLDERLESS, POWER ...... 069 N2, N3, 0 N, Nl, AND ON TYPES CONSOLES,

Carrier Group Alarm ...... 362 Selector ...... 504 Deviation Regu lator ...... 362 ...... 0 ••••••••••••••••••••••••• 504 Junctions ...... 362 CONSTRUCTION EQUIPMENT, ( Outside Plant ) ...... 649 ON/K Systems - Repeatered High-Frequency CONTACTORS ...... 026 Line ...... 362 CONTACTS, APPARATUS - CLEANING, ON/Radio Systerns - Radio Multiplex Points . 362 RECONDITIONING AND REPLACING ...... 069 Repeaters ...... 362 CON'l'ROL PANELS ...... 026 Signal Receiver Unit ...... 362 CONTROLLERS, Terminal Equipment ...... 362 Control Units ...... 024 P Type Engine Control Ci rcuits ...... 024 General Description ...... 970 Master Controllers ...... 024 Pl ...... · · · · · · · · · · · · · · · · 363 Voltage Controllers ...... 024 7F Test Set ...... 363 CONVERSION TO UNIFORM NUMBERING PLAN ...... 000 Tl Type CONVERTERS Outside Plant ...... 632 ,) Station - TTY ...... 570 -.· . Other ...... 365 Other ...... 161

Wire Line Entrance Links ...... 357 COPAN NETwORK ...... 310

CARTONS, SHIPPING ...... 500 CORD REELS,

CENTRALIZED M�NUAL CONTROL SYSTEM ...... 310 Station Application ...... 501

CHANNEL BANKS - ( J, K and L Type Carrier ) ... . 356 Other ...... •. 032 CHANNELS FOR FEDERAL AVIATION AGENCY, AIRLINES CORDS,

AND OTHER AGENCIES ...... 310 Station Application ...... 501

CHANNELS FOR POLLING TELEVISION RECEIVERS ... . 310 Other ...... 032

CIRCUIT BREAKERS ...... 026 COUNTERCELLS ...... 157 CIRCUIT ORDER TESTING ...... 331 COUNTERS ...... 0 30 CIVIL AIR DEFENSE WARNING SYSTEMS, CRASH ALARM SYSTEMS - ( Cu stomer Equipment ) ... 480 General Description ...... 951 . . CREDITING CHARGES ON TEST CALLS ...... 010 Other ...... 201 CROSSBAR OFFICES

CLASSES OF PROGRAM SERVICE ...... 320 . No. 1

CLEANING, APPARATUS ...... 069 General Description ...... 957 CLEANING CABINET ...... 034 Other ...... 216 ,, ')' ...... 069 CLEANING, GENERAL . No. 5

CLOCKS ...... 030 General Description ...... 958 CLOSED CIRCUIT TV ...... 641 Other ...... 218 CLOSURES, CABLE ...... 633 Tandem TELEVISION TRANSMISSION General Description ...... 960 SYSTEMS - RF TYPE ...... 318 ( ) Other ...... 220 CODE CALLING SYSTEMS - Cu stomer Equipment .. 473 Toll, No. 4A and 4M,

COIL CASES, GENERAL ...... 626 General Description ...... 964 COIN COLLECTORS, Other ...... 212 Common Battery ...... 506 CROSS CONNECTIONS, DISTRIBUTING FRAME ...... 069 Local Battery and Magneto ...... 510 C:F.OSS REFERENCE LISTS ,) COIN CONTROL, A Serj_es to Plant Series ...... 200

( ) ...... 951 Inband method General Descriptive B Seri.es. to Plant Seri.es ...... 000

COIN RELAYS ...... 506 C Series to . 000 ( Plant Series ...... COMMAND CONFERENCE SYSTEMS - Customer E Series to Plant Series 300 Equipment ) ...... 480 G Series to Plant Series 000 �) Page 2 SECTION 000-000-001

CROSS REFERENCE LISTS (Cont'd) DIRECTORY, TELEPHONE, Alcove ...... o ••••••••••••••••••. . ••••. 508 . Hangers, Fasteners, Binders ...... 508 ( H Series to Plant Series ...... 000 . Tables, Cabinets, Shelves ...... 508 J series to Plar1t 2erie3 ...... OO'J P Series to Flant Series ...... , , . .... 570 DISPATCHING SERVICE - (Customer Equipment) ... 473 R Series to Plant Series ...... 0. 0 • 0 0 ••• 400 DISTRIBUTING FRAMES. . o .o. o •••••••• ••••••••••••• 201 950 Series to Plant Series o 0 •••o o o•. o• o.o •o 000 DISTHIBUTOPS ...... o ••••• o • • • • • • • • • • • • 034

CROSSTALK MEASURING TEST SET ...... 103 DF.Jl.WINGS 0 0 • 0 •••••••••• o •• o • o o • • • • • • • • • • • • • • • • 005 ( DRIVE-UP PUBLIC TELEPHONE ... o •••••••••••••••• 508 D DElVES, PANEL AND MOTOR ...... 159

DROP WIRING ...... o •• •••••••••••••o • • • • • • 462

DATA, DHOPS 0 •••••••• o •••••• o. o ••••• o ••••••••••••••• 032

Auxiliary Sets ... 0 ••••••••••• o •••••••• o •• o • 598 DRY CELLS . o o •• o o •• o ••• o ••• o •••• o • • • • • • • • • • • • • 157

...... 590 .... o •• o •• o •• o •••o • o •••••••••••• o •• o • • Units ...... DUSTING . 069 DYNAl'V!OTOHS ...... 159 DATA SETS

General Information . .. o ••••• o•. oooo •••••••• 590 E

100 Series and Associated Services ...... 591

200 Series and Associated Services ...... 592 ECHO SUPPHESSORS ...... 332......

..... 10 f 300 Series and Associated Services o• •• 593 ECHO SUPPRESSOR TEST SET ...... 3 400 Series and Associated Services ...... 594 EDGE SOHT CARDS ...... 010 ...... 600 Series and Associated Services ...... 596

...... 314 Transmissiou Tests ...... ELECTF.ICAL INDICATING INSTRUNENTS

•• ••••••••••••••••••••• • • • 592 Catalogue Information ...... 084 DATASPEED ...... o DATA SYSTEMS, Common Usage - Maintenance, Selection and

...... 100 Auxiliary Equipment ···o······ .... . 590 and 598 Use General Description ...... 972 Switching Systems and Power - Maintenance,. DATA TEST CENTER, Selection and Use ...... 102

ELECTHICAL TEST EQUIPMENT, (Outside Plant) . .. 106 Maintenance .. 0 •••••0 •••• 0. 0 o •• o •• o ••••••• o. 205 DATA TEST CIRCUITS, AUTOMATIC ELECTROLYSIS, (Outside Plant) ..... o •••••••••• 635 ELECTRON TUBES Maintenance .....0 •••• 0 0 ••••••• o ••• o •••• o o •• 205 DATA TEST SETS, General Information ...... • 024 Station Application ...... 501 Pulse Measuring ...... o • • • • • • • 103

Other ...... o ••••••••••••••••••••••••• 107 Test Sets and Test Data ...... 100 . . ELECTHONIC SWITCHING SYSTEMS (ESS) DATA UNITS ...... o ••••••• o. o •••••••••••• 590 No. 1 DEDICATED PL�NT (Outside Plant) ...... o. 642

Description ••••••••• 0 •••••••• 0 ••••••••••0. 966 ( DEFINITIONS ...... o o •••••o ••• o.o ••••••• 005 No. 101 DEHYDRATORS ...... o ••• ••••••••• o • o •• 161

Description . 0 •••••••••••• 0 •••••••••••••••• 966 DELAY MEASURING SETS ...... o ••• 103

Other ..... 0 . 0 ••••••••••••••••••••••••••••• 240 DESIGNATION CARDS ...... o o ••••••••••. o o ••••. 030 DESIGNATION STRIPS (Stations) ...... 501 ELEVATOH APPARATUS - PANEL SWITCHING SYSTEN 026 ELEVATOR TELEPHONE SET ...... 502 DESKS, PLANT, TRAFFIC AND SERVICE OBSERVING General Description ...... 953 ENEHGENCY ALARM SYSTEMS -

. CENTRAL OFFICE . .. . o •• o •• o • o.o •••••••• 0 ••• 0 •• 201 Other ...... o •••••••• 210

E�JEHGENCY LINE OH TRUNK TRANSFER CIHCUITS .... 201 DETECTORS (Radio) ...... o •••••o • • • • • • • • • . 104 DEVIATION REGULATOR N AND ON2 CAHRIER SYSTEMS 362 EMERGENCY HEPORTING SYSTEMS,

DIALERS, AUTOMATIC .. o. o ••••••••••••••••• ••••• 512 Central Office Equipment ...... 0 . 0. 067 DIALS, DIAL ADAPTORS AND MOUNTINGS, Customer Equipment , ooo o••···· o••o ••••••••••• 473 ...... o • • • • • • • • • • • • • • • Station ...... 0 • • • • • • • • • • • • • • • • • 501 E};GINE ALTERNATORS . . 155

Other ...... 028 ENGINEERING COICPLAINT PROCEDURES ...... 010 DIGITAL AND ANALOGUE DATA THANSMISSION SYSTEM£, Ei�GINES AND ENGINE SETS ...... 159 EQUALIZATION OF FHOGRAM AND WIRED guSIC Al Digital Data Transmission System ...... 0 314 CIRCUITS ...... 320 Data Line Switching Network . o •• 0 •o•o o. 0 ••• o 314 ( EQUALIZERS, Data Systems - Common Ci rcuits) Equipment . Program Circuits . 0 ••••••••••••••••••••••••• 320 and Procedures ...... o •••• o •• 314 DIGITAL AND ANALOGUE DATA TRANSMISSION SYSTEMS, Station Sets ...... 501 (Cont'd) EQUIPHENT CABINET'S (Station Systems) ...... 463

Data Systems on Direct Distance Dialing EXCHANGI':-AREA CABLES - CO!�PLETION TESTS ...... 330

EXHAUSTEF. SETS ..... o o •••o • • • • • • • • • • • • • • • • • • • • 161 (ICDD) Network .... 0. 0 ••••• 0 ••• 0 •• o 0 •••••• 0. 314

Data Systems on Private Lines . o••··· •.••••• 314 F Dial TWX on Direct DistaLce Dialing (DDD)

NetviOrk ...... 0 0 • • • • • • • • • • • • • 314 FANS, Sage Data TransmissioL Systems ..... 0 ••••••• 314 Booth 0 0 •••0 •••••••••••••••0 •••••• 0 0 •••••••• 508 Telephotography ...... 0 0 •••••••• 0 •• 0 ••••••• 314 { Other . 0 •• 0 ••••••••• o ••••••••••• •••••••••••• 161 Wide Band Data Systems ... 0 •• 0 0 ••• o•• ••••••• 314 DIODES, FARM INTEHPHONE . . o •• o •••••••••••••••••••••••• 512

FASTENERS ...... Station Applic ...... ·•••o•••• 080 ation ••••• 501

FEDERAL AVIATION AGENCY ...... Other . o ••••••••••••••••••••••••••••• ••••••• 032 310 DIRECT DISTANCE DIALING FEDEHAL TELECOMNUNICATIONS SEHVICE (FTS) .... . 310 . FEECERS, l Equipment (General Descriptive) ...... 951 Battery - (Customer Equipment) ...... 460 Notes on DDD ...... •.... 0 •••••• , ••••• 010 Ringing - (Customer Equipment) . 0 ••••• o ••••• 460

Page 3 SECTION 000-000-001 H

HANDLING, FILA.NIENT SUPPLIES ...... 169 Disconnected Station Apparatus ...... 500 FILTERS (Station Application), Wire and Cable (Station) ...... 461 Battery Supply ...... 518 HANDSET CORDS ...... 501 Radio Frequency (Due to Dialing) ...... 501 HANDSETS ...... 501 FINGERWHEEL (Dial) ...... 501 ) '" HAND TELEPHONE SETS ...... •...... 510 FIRE FIGHTING ...... · . 010 HEADBANDS AND PADS ...... • . . . 0 28 FIRST AI::> ...... •...... 010 HEAD TELEPHONE SETS ...... 028 FITTINGS, FLOOR DUCT AND WIREMOLD ...... 461 HEATER BASE, KS-14782 ...... 514 FIXTURES ...... · ...... 065 HOME INTERPHONE ...... 512...... FM TERMINAL TEST SETS ...... 104 HOME-TO-SCHOOL INTERCOMMUNICATING SYSTEM ..... 512 FOREIGN EXCHANGE SERVICE ...... 310 ) ' HORNS, AUXILIARY SIGNAL ...... 463 FOUR-WIRE SWITCHING PLAN USING NO. 5 CROSSBAR

General Description ...... 958

Other ...... 310 FREQUENCY ANALYZERS

Rajlo ...... 104 IMPAIRED HEARING TELEPHONE APPARATUS ...... 500 Other ...... 103 IMPAIRED SPEECH TELEPHONE APPARATUS ...... •... 502 FREQUENCY SHIFT PULSING NO. 5 CROSSBAR OFFICES IMPEDANCE MATCHING DEVICES (Radio) ...... 104 General Description ...... 958 INDEXES, Other ...... 218 Alphabetical, '" FRICTION PADS, KS-8035 Building Engineering and Operation ...... 760 ...... ··�).· Key 512 Customer Equipment ...... 460 Telephone Set ...... 502 Gauges - Catalogue Information ...... 084 FTS (Federal Service) ..... 310 Master ...... 000 FURNITURE ...... 065 No. 5 Crossbar ...... 218 026 FUSES AND MOUNTINGS Ou tside Plant ...... 620

Station Equipment ...... •...... 460 Step-by-Step and Community Dial ...... 226 Supplemental Information -Central Office . 201 G Tools - Catalogue Information ...... 074 Code, GAUGES, Numerical (Station Equipment) ...... 460 Catalogue Information .. " ...... 084 Numerical, Common Usage - Mai ntenance, Selection and Division, see Particular Division Use ...... 085 Master ...... 000 GENERAL INFORMATION, All Divisions ...... 000 INDUCTION COILS ...... •...... 501 GENERAL INFOR��TION (Customer E4uipment) ..... 460 INDUCTIVE NOISE, STATION EQUIPMENT ..•.•...... 500 GENERAL INFOR�TION (Divisions 020 to 179) ... 020 INFORMA'riON DESKS (Central Office) ) GENERAL PLAN, Plant Series ...... 000 Description ...... 953 GENERATORS, General Other ...... 210 Charging ...... 155 INFORMATION DESK (Customer Equipment) ...... 475 Milliwatt Reference ....•...... 103 INSULATING CONTACTS - METHOD ...... 069 Motor ...... 155 INTERRUPTERS, Ringing .•...... 155 Station Systems ...... •...... 518 Signal Other ...... •....•.. 163 Radio ...... 104 INVERTERS, Other ...... 103 For Telephone Answering Sets ...... 514 GFELLER LINE CONCENTRATOR ...... 067 Other ...... •...... •... 161 GLOVES_, INSULATING

Outs ide Plant ...... 081 J Other ...... 075 GOGGLES ...... •...... •..... 620 JACKS, GONGS, Station ...... •...•...... •..• 461 Station Application ...... 501 Other ...... 032 Other ...... 028 JCSAN NETWORK ...... ··)·· 310 <'\l, GOVERNMENT SERVICES (Customer Equipment) .... . 480 JOINT CHIEF OF STAFF ALERTING NETWORK (JCSAN) 310 GROUND RODS ...... , .. 638 JU NCTIONS GROUNDING REQUIREMENTS, Type 0 and ON Carrier Systems 362

Autotrailers ...... •...... 462 Booths ...... 508 K Portable Electric Power Tools ...... 080

Power Plants ...... 167...... KEY EQUIPMENT, STATION ...... •...... 512

Protector and Signaling Grounds ...... 638 KEY SERVICE UNITS ...... • ...... 518 . .

Sign, Illuminated ...... 508 KEY TELEPHONE SYSTE�B ...... ••...•...... 518

GROUP ALERTING SYSTEM ...... 480 KEY TELEPHONE UNITS •...... 518 GROUP CONNECTING CIRCUITS - (J, K and KEYS, {\) L Type Carrier) ...... 356 . . . . . Station Equipment ...... 512. . . . .

Other ...... •..... 032 Page 4 u) SECTION 000-000-001

N L

NETWORKS (Station Set) ...... •...... 501

( NETWORKS (Terminating) ...... 103

NIGHTLIGHT TELEPHONE SETS ...... 502 . . . LADDERS AND LADDER SEATS NOI SE AND MODULATION TESTS - ( J, K and (Central Office) ...... 065 L Type Carrier) ...... 356...... LAMPS, NOISE MEASUREMENTS, Booth ...... 508 Off-Premises Station Lines ...... 331 Message Waiting ...... •...... 502 ( PBX Central Office Trunks ...... • . . 331 Resistance, Tie Trunks ...... 331...... Station Application ...... 518 Two-Wire Subscriber Loops ...... 331 . . . Other •...... •...... 032 NOISE MEASURING SETS ...... 103 Switchboard ...... 032 NON- MICROWAVE RADIO ...... 408 LETTERING - (Customer Equipment) ...... 460 NUMBER CARDS AND STRIPS ...... 501 LIGHTING FIXTURES, NUMFERING - (Customer Equipment) ...... 460 Booth ...... 508 NUMBERING MACHINE (Number Card) ...... 080 Other ...... 065 NUMERICAL INDEXES, see INDEXES LINE CONCENTRATORS ...... 067

LINE CONCENTRATORS (Outside Plant) ...... 639 0 ( LINE SWITCHING SERVICE (DATA SYS'I'EMS) ...... 591 LINE-UP OF GROUPS IN TANDEM - (J, K and OSCILLATORS L Type Carrier) ...... 356 Radio ...... 104 LOUDSPEAKER CONFERENCE SERVICE ...... 512 Other ...... 103 LOUDSPEAKER SETS ...... 463 OSCILLOSCOPES Radio ...... 104

...... Other ...... 103

...... OPEN WIRE PROGRAJV! SYSTEM . . ... 320 OPERATOR CHAIRS ...... 065 M OPERATOR TRAINING EQUIPMENT ...... 201

ORDEH TURRETS - (Customer Equipment) ...... 475 ORDER WIRE SYSTEr�S,

ORDERING INFORV�TION - BSP's ...... 000 MAGNETIC REPERTORY DIALER ...... 512 General Description ...... 951 MAINTENANCE CENTER Other ...... 201 Ll and L3 Type Carrier ...... 360 ...... OUTSIDE PLANT, GENERAL . ...620 TD-2 Microwave Radio ...... 410 . . . . ( TH Microwa'JO F.adio ...... •... 412 MANHOLES ...... 622 p MASTER ALPHABETICAL INDEX, Plant Series ...... 000

MASTER NUMERICAL INDEX, Plant Series ...... 000 H.CKAGING ANI! HANDLING (Station Apparatus) ... 500

...... MATERIALS - POWER . . . . 065 PADS, MECHANICAL PROTECTION (Wire and Cable) ...... 461 Friction, KS-8035 ...... •...... 502 MESSAGE WAITING LAMPS ...... 502 HeaJband ...... 028 MESSAGE WAI TING SEEVICE (Gustomer Equipment) . 473 PANEL OFFICES ...... 215 METERS PARTY LINE INTERFERENCE, PREVENTION OF ...... 502 Catalogue Information ...... 084 PATCHING BAYS - Carrier Systems ...... 356 Common U sag e - Maintenance, Selection and PBX SWITCHE� LONG HAUL TIE LINES ...... 310 Use ...... 100 PEEFOEA':LOF3 ...... 034 ...... 104 Radio PERSONAL SI GNALING SYSTEM NO. lA ("BELLBOY") METHODS Central Office Ij:quipnent ...... 201

•••0 •• 0 ••••0 •••••••••• 0 ••••• 0.0 ••0 0. 010 General General Description ...... 975 �lisce ...... 069 ...... llaneous . PHOTO PROCESSORS ...... 030......

...... MICROFILM ...... 006 ( SYSTEMS ...... PILOT WIRE REGULATORS ...... 332 MICHOWAVE HADIO - see HADIO PLUGS,

MILLIWATT DISTHIBUTING SYSTEMS ...... lc)3 Station Application ...... 461

MILLIWATT HEFERENCE GENERATORS ...... 103 Other ...... 032

MODULAR STATION APPARATUS ...... 512 POLE CHA;,;GERS ...... 163 . . 320 MONITORING ARRANGEJVIENTS FOR PROGRMl SYSTEMS POLE LINES ...... 621 H CL S ...... 720 MOTOR VE I E POTENTIOMETERS ...... 028 MOTOROLA MICROWAVE RAGIO ...... 408 POWER CABLE AND CORD ASSEMBLIES (Booths) .... . 508 �-10TORS ...... 159 POWER CORD PLUG RETAINER ...... 167 MOUNTING COR::JS ...... 501...... POWER - Iv!ISCELLAl:EOUS ::::IR�UITS _;,:tD EQUC:PI�EIJT . 1 71 MOUNTINGS (Station E�uipment), . POWEH PLANT MATERIAL ...... 065 Apparatus ...... 463 ( PO'v'IEP PLA;:':LS A:;D FJWER SUPPLY ...... 167 Dial ...... •...... 501 . . POWER RELAY SETS ...... 463 Coll c t r ...... 508 Drive-up, Walk-up (Coin e o ) PRESSURE SY::''iEMS,

Key ...... 512 JV! C:1blc ...... MULTISTATION SYSTE S ...... 31C1 PREWIRING (High Rise Apartments) ...... { PRIMARY ALERTING SYSTEM (SAC) ...... 310 Page 5 SECTION 000-000-001

PRIVATE BRANCH EXCHANGES, RECORDED TELEPHONE DICTATION TRUNK - (Customer Equipment) Common Information General Descriptive •...... 981 All PBXs ..•.....•••...... ••. 534 Equipment .••...... •...... 473 500 and 600 Series .•...•..••...... ••...••. 534 RECORDER CONNECTORS ...... •..... 463 700 Series . . . • . . . . • ...... • . . . • . . . . . • • . . • . . 540 ·�l RECORDER COUPLERS ...... •...•.....•..•...... 463 General Descriptive

All PBXs • . . . • . . • . . • . . . . • . . • ...... 981 . . RECORDERS AND RECORDER-REPRODUCERS Specific Information General Description ...... 951

500 Series (except 508 and 520) . . . • . • . . . . . 536 Other ...... 034 RECORDERS TRAF FIC AND CONCEN'rRATOR 508A - (Dispatching Service) •..•.•.••.•... 473 - TRUNK USAGE, 520-Type - (Emergency Reporting System) .•• 473 •'l General Description ...... 951 600 Series • . • ...... • . . • . . • . . . . . • • . . . 538

...... •...... 700C •.••...•...••...... •.... 541 Other 201

701-Type ....•..•.•.....•.....•....•..•..•• 542 RECTIFIERS ...... 169 ......

702A •...•...... •.•...•...•.•..• 543 REGENERATIVE REPEATERS ...•...... 034

...... •..•.....••..•...... •... 710C ...... •.•....••...... 541 REGENERATORS 034

711-Type ...... •....•. 542 REGISTERS ...... 030

7L�O- Type . . • ...... • ...... 546. REGULATORS,

750A ...... •.. 548 Speed ...... •...... •...•...... 024 755A ...... 550 Voltage ..•.....•..•...... •...... •... 024 756A ...... 551 RELAYS, +j Coin ...... •...... •..•...... •.... 506 757A ...... •...... ••.....•.... 551 "}'.). Other ...... •...... 040 758C ...... •.....•...•..•...•...... •.•....• 551 REPEATERS 761A ..•..•...... • 551 PRIVATE LINE CONFERENCE CIRCUITS ...... 201 Test Sets 2G ...... ••...... •..• 103 PRIVATE LINE TELETYPEWRITER SERVICES ....•.... 571 PRIVATE LINE TELEPHONE SYSTEMS AND SERVICES .. 310 12F, E Repeater ..•...•....•.....•...... 103 Type N, 0 and ON Carrler Systems PRIVATE SERVICE SYSTEMS (Gener·al Descriptive) . 982 Repeatered High-Frequency Line ...... 362 PROGRAM DOCU!Y',ENTATION STANDARDS, EDP .•...... • 007

PROGRAM TRANSMISSION SYSTEMS AND SERVICES •... 320 Voice Frequency PROTECTION, 22 and 44 Type . . . • . . . . • . . • . • . . . . . • . . • . . . . .332

Electrical (Outside Plant and Station E Type .•.....•...... •.•...... •.....•... 332 V Equipment) ...... •..•....•..•..... Type .•..•.•...•...... ••...... 332

Mechanical (Station Wire and Cable) ...... REQUIRE�lliNTS, GENERAL - (Divisions 020 to

...... •...... •.•..•..... Other Customer Equipment ...... •...... 465 179) 020 REQUIREMENT TABLES ...... 005 PROTECTION SWITCHING TEST SETS •...... •. 104 .•..•...... ••...... 010 PROTECTORS AND MOUNTINGS ...... 638 RESCUE PROCELJURES RESISTORS ...... 032 RETURN LOSS TEST SET . • ...... • . . . • • ...... • . • • . 103 )

R RHEOSTA'rS ...... •...... •...... 028 RINGERS ...... 028 ...... RACEWAYS AND CONDUIT (Customer Equipment) .... 461 RINGING FEEDERS - (Customer Equipment) ..•.... 460 RINGING �1ACHINES ...... • 163 RA:::JIATION ...... •.....•...•... 010 RADIO, RODS, TRIP ...... 026 Motorola Microwave ...... 408 Non-Western Electric Microwave ...... 408 s RCA Microwave ...... 408 Test Equipment 104 SAC - PRIMARY ALERTING SYSTEM 310 TD-2 Microwave 410 SAFETY PRECAUTIONS, TD-3 Microwave ...... 411 Ca thoc\e Ray Tubes • . . . . • ...... • . . . . . 010 TE Nicrowa ve ...... •...... ••...... •... 1+09 Electronic Equipment ...... •...... 010 TH Microwave •...... 412 SAGE ( l02A Key Equipment) ...... l-t80 . . . TJ Microwave 409 SAGE DATA TRANSMISSION SYS';"EMS ...... 314 TL T>�IicroW::ille .•....•••..•.•...•...•.••••.... 409 SCAN (Switched Circuit Automatic .... 310 RADIO FREQUENCY SUPPRESSION FILTERS SCHOOL-TO-HOME INTERCOMMUNICATING SYSTEM ..... 512 �,(' )' (Station) ...... 501 SECRETARIAL SERVICE - (Customer Equipment) RADIO MULTIPLEX POINTS Concentrator Equipment ...... •...... 067 ON/Radio Systerns ...... •...... 362 Concentrator-Identifier System (General RADIO PROGRAM CIRCUITS ...... 320 Descriptive) ...... 951 RANGE CHARTS ( Private Brar:ch Exchange) ...... 534 Swit chboar::l EquLpment ...... 536 RAPIDIAL ...... •...... 512 SELECTIVE CALLING SYSTEMS RCA MICROWAVE RADIO ...... 408 lA High Speed . . • . • ...... • ...... • . 592 READERS ...... 034 83B3 ...... •...... 581 RECEIVERS, SELECTIVE C0!<;1'ROL SYSTEM ....•...... 310 Bone Conduction ...... •...•...•... 501 SELECTivE SIGNALING SYSTE�IS .•...... ••.... 310 Data Set ...... 594 ) ; SELECTOR CONSOLES ...... • . . . • ...... • . . . . .504 . Door Answering ...... 512 SELECTORS 026 Head Set ...•...... 028 SERVICE OBSERVING DESKS Station 50} Gcner�l Description ...... 953 RECONDI':CIONING APPARATUS ...... 069 Other- ...... • ...... 210

SHELVES, BOOTH 1\ND DIRECTORY ...... • ...... 508 Page 6 J SECTION 000-000-001

SIGNAL GENERATORS ( Radio ) ...... 104 No. l, 3, 5 and 6 Toll Offices and No. 1, SIGNALING EQUIPHENT ...... · 179

. ... 3, 5 and 6 Toll Switchboards ...... 211 SIGNALING SYSTEMS ( General Descriptive) ...... 975 No. 4A and 4M Toll Switching Systems, SIGNALS ...... 032 (" SIGNS, PUBLIC TELEPHONE ...... 508 General Description ...... 964 ...... SINGING POINT TEST SET ...... 103 Other ...... 212

SINGLE SIDEBAND PROGRAM SYSTEMS ...... 320 No. 300,

...... General Description ...... 981 SOCKETS ...... 032 SOLDERED CONNECTIONS, MAKING AND Other ...... 480

REMOVING ...... 069 No. 305, ( SOUNDERS ...... 028 General Description ...... 981 ...... SPEAKERPHONE SYSTE�� ...... 512 Other ...... 480

SPECIAL MULTISTATION SYSTEMS ...... 310 No. 307,

( ) ...... SPECIAL SAFEGUARLING MEASURES SSM . . .. 460 Data Equipment ...... 592

( ) ...... SPECIAL SERVICE PROTECTION SSP . .. . 460 Switching Equipment ...... 480 SPECIAL SERVICES - Customers' Premises No. 400,

( General Descriptive) ...... 981 General Description ...... 981

...... SPECIFICATIONS ...... 005 Other ...... 518

SPEED REDUCTION UNITS ...... 161 No. l Crossbar

SPLICING General Description ...... 957

...... Cabl·e ...... 63} Other ...... 216 ( ':'1 Carrier ...... 365 No. 5 Crossbar ...... STANDING ORDERS FOR BSP's ...... 000 General Description ...... 958

...... STARTERS ...... 026 Other ...... 218 STEP-BY-STEP OFFICES Panel ...... 215

General Description ...... 955 Step-by-Step and Community Dial

Equipment Common to More Than One Type General Description ...... 955

Step-by-Step or Community Dial Office ..... 226 Equipment Common to More Than One Type

General and Testing Information Applying to Step-by-Step or Community Dial Office . .. 226

Intertoll Dialing, CA��' A�� and ANI ...... 227 General and Testing Information Applying Testing Information Applying to Specific to Intertoll Dialing, CAMA, AMA, ANI Step-by-Step and Community I:ial Offices ... 225 and Common Control ...... 227 STfl.ATEGIC AIR COMJVlAND PRI��RY ALERTING SYSTEM. 310 Tes U_LS Information Applying to Specific

SUB�J.ASTER AND MASTER GEOUP EQUIPMENT - Step-by-Step and Commc:nity Dial Offices . 225

( ) ...... ( L Type Carrier) ...... 356 . . . . . SYMBOLS Schematic . . . 005 SUBSCRIBER SETS,

...... Common Battery Station Sets . . . . . 502

Common Battery Coin Collectors ...... 506

( Local Battery SLction anJ Coin Sets ...... 508 T SUPERGROUP CONNECTOH -' ( Ll Type Carrier ) . .. . . 356

TAPE REELS AND REELER ...... 034 SUPERVISOH CHAIHS ...... 065 TD-2 Microwave Radio ...... SUPPLE�1ENTAL INFORMATION - CENTRAL OFFICES ... 201 410 TD-3 Microwave Rad io ...... 411 SUPPLIES TE MICROWAVE RADIO ...... 409 ...... Controls ...... 742

TELEGRAPH SYSTEMS ...... Distribution ...... 744 312 TELEGRAPH TESTBOARDS, Functions - Miscellaneous ...... 746

...... Maintenance ...... 205 General Information ...... 740 TELEGRAPH TEST SETS ...... , ...... Material Returns ...... 745 103

TELEPHONE ANSWERING SETS ...... Ordering ...... 743 514

TELEPHONE ANSWERING SYSTE�IS ...... SupportiLg Funcrior.s ...... 7 41 514 SWITCHBOARD EQUIPf!\ENT, MISCELLANEOUS, TELEPHONE CONSOLES ...... 504 ( . . . . TELEPHONE REPEATEH TEST SETS Voice CENTRAL OFFICE ...... 201 ) . SWITCH PAl:ELS ...... C"iO Frequency ...... 103 TELEPHONE SETS, SWITCHED CIRCUIT AUTO�IATIC NETWORK ( SCAN ) .... 3l0

SWITCHEI' SERVICES NE'Tv/ORKS ...... 31C) Attendant and Operator ...... 028 ( . SWITCHES, Stetion ...... 502

!V!agr:eti2 ...... 826 TELEPHOTOGRAPHY ...... •...... 314 Other ...... D30 TELEHAFID AUTO�lATIC DIALERS ...... 512

SWITCHING EQUIP�1ENT FOR PRDGRA�I SYSTE�iS ...... 320 TELETRAINERS ...... 473 S�JITCHING SYSTE�JS TELETYPEWRITER

Automatic Protcctio� ( Radio ) - See Codes, Selecting ...... 570 C·)nverters, Automatic Protection Switchin� Station ...... 570 Crossbar Tandem General Information, Miscellaneous Apparatus

General Description ...... 960 and Auxiliary· Equipr,_ent ...... 570

Other ...... 220 Mo':or Units ...... 570 ( Electronic Switching Syste�B, Private Line Services ...... 571 No. 1, Selective Calling Systems ...... 581

...... General Description ...... 966 Switching Systems ...... 580

No. 101, Tape Splicers ...... 570

General Description ...... 966 Winders, Uriwinders, Rewinders ...... 570 2 ...... Other ...... 40 14, 15, 19 and 20 Types ...... 572 �" No. 1 Accounting Center, 28 Tvoe ...... ·. · ·. · · · · · 573 General Description ...... 968 30 574 Other ...... 213 Page 7 SECTION 000-000-001

TELETYPEWRITER SWITCHBOARD NO. 6A ...... 211 TELETYPEWRITER TEST SETS, Statior; Equipment ...... 080 Data Application ...... 107 Switchir;g Systems ar;d Power - Mair;ter;ar;ce, Other ...... 103 . . Selectior; and Use ...... 076 TELEVISION SYSTEMS, TOTALIZER, A2 Video Transmission System and Ger;eral Descriptior; ...... 951 ) Associated Equipment Units ...... 318 Other ...... 201 A2A Video Transmission System and TRAFFIC MEASURING SETS ...... 201 Associated Equipment Units ...... 318 TRAFFIC USAGE RECORDER, Closed Circuit (Outside Plant) ...... 641 Ger;eral Description ...... 951 Coaxial Transmission Other ...... 102 ) S:vstems - RF Type ...... 318 TRANSFORMERS, STATION ...... 501 Descriptive Information - Ge neral ...... 318 TRANSISTOR ...... 032 J44107 Television Operating Centers TRANSLATOR ...... 034 and Associated Equipment Units ...... 318 TRANSMISSION AND CIRCUIT ORDER TESTING ...... 331 Local Video Ch annels and Services ...... 318 TRANSMISSION MEASURING SETS ...... 103 Off-the-air Pick-up Receivers ...... 408 TRANSMISSION SYSTEMS (Ger;eral Descriptive) ... 970 Over-all Line-up of Video Facilities ...... 318 TRANSMISSION ZONING, STATION ...... 500 TELEVISION TEST SETS ...... 103 TRANSMITTER TRANSFER UNIT - (Customer

TERMINAL BLOCKS ...... 461 Equipmer;t) . .... , . . • . . . . . • ...... • . . . . . 473 TERMINAL EQUIPMENT COMPONENTS - TRANSMITTERS, (L Type Carrier) ...... 356. . . . . Headset ...... 028

'') (N, Nl, N2, N3, 0 and ON Type Carriers) .... 362 Sp eakerphor;e ...... 512 ...... TERMINAL STRIPS (Distributing Frames) ...... 069 Station ...... 501 TERMINALS, CABLE ...... 631 TRIP RODS ...... 026 ......

TERMINATING ARRANGEMENTS - (J, K and TUBE COOLING SYSTEMS ...... •....•.. 161 L Type Carrier) ...... 356 . . . . . rwO-POINT PRIVATE LINE TELEPHONE CIRCUITS .... 310 TERMINATING SETS, 4-WIRE ...... 332 TWX (Dial) ...... 591 TERMINATIONS, MAIN FRAMES ...... 636 TWX AND DATA SYSTEMS (Ger;eral Descriptive) ... 972 TEST CALLS-CREDITING CHARGES ...... 010 TwX SUBSCRIBER LINES (DIAL TWX) ...... 314 TEST CONNECTIONS TO APPARATUS ...... 069 TYPE K BRANCHING ARRANGEMENTS FOR PROGRA�I TEST EQUIPMENT, SYSTEMS ...... 320 ...... Com mon Usage - Maintenance, Selection and TYPE Ll GROUP BRANCHING AND BRIDGING ARRANGE- Use ...... 100 MENTS FOR PROGRAM SYSTEMS ...... 320 Customer Equipment ...... 105 Data Systems ...... 107 Outside Plar;t ...... 106

PBX ...... 105 Radio ...... 104 ) a St tions ...... 105 u Switching Systems ar;d Power - Maintenance, Selection and Use ...... lC:2 Telegraph ...... 103 UPKEEP WORK UNITS ...... 015 Teletypewriter, Data Application ...... 107

Other •...... 103 Transmission ...... 103 TEST UNIT, 2A TOLL ...... 103. . . . . TH MICROWAVE RADIO ...... 412 THERMISTORS ...... 032 ...... v TICKETERS ...... 030 TIMERS ...... 030 TIME STAMP ...... 030 ...... VACUUM TUBE MICROPHONIC NOISE TESTS ...... 320 TIMING CIRCUITS ...... 201 VARISTORS ...... 032 ...... TJ MICROWAVE RADIO ...... 409. . . . . VAULTS, TL MICROWAVE RADIO ...... 409 Cable ...... 6 22 ';,{;.) TOLL CONFERENCE GROUPING CIRCUITS ...... 332 VENTILATING EQUIPMENT ...... 161 TONE ALTERNATORS AND TONE MACHINES ...... 155 VENTILATORS, BOOTH ...... 508 TONE SUPPLY CIRCUITS ...... 201 VIDEO TEST SETS ...... 103...... TOOLS VISUAL DELAY TEST SETS ...... 104 Catalogue Ir.formation ...... 074 VOICE CONTROLLED SWITCH ...... 463 Common. Usage - Maintenar;ce, Selection and VOICE FREQUENCY TRANSMISSION MEASURING SETS .. 103 Use ...... 075 VOLUME INDICATORS ...... 320 Outside Plant ...... 081 VOLUME LIMITER FOR SPECIAL SERVICES ...... 310 ' vi

Page 8 .J SECTION 000-000-001

w WIRE LINE ENTRANCE LINKS - (Radio and

Carrier Systerns) . o •••••• o • o •••••••• 0 o • 0 • • • • • 357 ( Type A-TD2 Radio Systems ...... o •••••••• 357 - TJ Radio Systems o••• •••• o•···· •o•• 357 TL2 Radio Systems ...... 357 WADS (WIDE AREA DATA SERVICE) ...... 591 TMl Radio Sys terns ...... o • • • 357 WALK-UP PUBLIC TELEPHONE ...... 508 - Basic Message Co nnecting Link . •o•• 357 WASHING . o • o • o •• o o o •••o •• o ••o o o o o o o o o o o o o o o o • o 069 Type B - TD2 Radio Systems ...... 357 ( WAVEGUIDES .... o ••••••••• o ••••••••••• o •••••• o. 161 - TJ Radio Systems ...... •oo•o•o· 357 WESTERN UNION CONTRACTS ...... 312 Type C-TD2 Radio and Ll Carrier ...... 357 WHEATSTONE BRIDGES ...... o ••o o o o •••••o o ••••••• 100 Type TH - Radio and Ll Carrier Facilities .. 357 WIDE BAND DATA TRANSMISSION SYSTEM . ooo •••• o •• 314 Type TL - Radio Message Co nnecting Link .... 357

WIDE BAND LOOP REPEATER . o ••0 o 0 ••••••••• o •• o •• 314 WIRED MUSIC CIRCUITS ...... o •••••••• o ••••••• 320 WIRE, WIRING, ;. Buried ...... , ...... , ...... ,.. 629 Customer Equipment ...... 461 Drop and Block ...... o••• ••••• 462 Drop and Block (Outside Plant) .. o•··· ooo••· 462

Inside ...... 0 •••••••• 461 WORK UNITS . o o. o o o o o o •••••••• o o.o •• o o •••• o o o o o 015 Multiple Line ..... 0 ••••••0 •• 0 •••••0. 0 ,••• 0 •• 624 WRAPPED CONNECTIONS ...... 069 ·r Open . 0. 0 •••••••••••••••, •••••••• ,,,•• . ,,, . 623

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Page 9 l 9 Pages