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Summary of Contents for Bell System Practices AC1
- Page 2 Set, Telephone, Hand, 220A· •1220A· • • •, • • • (MD), 2220B· *. • • • Base, Telephone, AC1· • • B ase, Telephone, AD1·* • Cord, Handset, H4DB· •(5 feet, 6 inches, • 6, 9, 12, and 13 feet)• •...
- Page 3 ISS 3, SECTION 502-303-101 TABLE A TABLE B COLOR ORDERING GUIDE CONVERSION OF EARLY MODEL AC1 AND AD1 TELEPHONE BASES ( FIG. 18 AND 20). STANDARD COLOR* SUFFIX Bl a c k MANUFACTURED PRIOR TO 10-1-72 TO AGREE WITH CURRENT PRODUCTION MODELS...
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Page 4: Installation
SECTION 502-303-1 01 NOTE: THE SCREWS USED FOR SECURING THE TERMINAL BOARD SHOULD NOT BE USED FOR STORING SPARE LEADS. SCREWS LINE SWITCH P-25E803 NUMBER CARD RETAINER Fig. 4-lnterior of AD1 Telephone Bose • • Space provided on bases for number card Location-desk, table, wall, etc. - Page 5 ISS 3, SECTION 502-303-101 Fig. 5-H4DB Handset Cord Fig. 7-220A Hand Telephone Set in Waiting Position on ACI Telephone Base When inside wire to the AC1 (wall) telephone 3.04 base is exposed, terminate the line and transformer wiring at a common bridging point, Fig.
- Page 6 3.10 an H5AD handset cord must be used (Fig. 11) the lamp equipped end of the cord plugs into the To replace the housing on the AC1 base, hand telephone set. See Tables E, F, and G when 3.06 lift and hold the line switch plunger while used with 1A1, 1A2, and 6A KTS.
- Page 7 Seal Removed 460. A 426N diode must be installed in either 3.1 5 the AC1 or A D1 base assembly when connecting for 4-party full selective or 8-party semiselective ringing. The two leads from the diode are designated No. 1 and No. 2.
- Page 9 ISS 3, SECTION 502-303-101 caution to prevent the lamp from flying out In early of the socket in a dangerous manner. production hand telephone sets use a 553A tool to remove the lamp from its vertical position (Fig. 14). Lamps carried for maintenance reasons Note: should be of the 53B-type since both early and current production handsets accommodate...
- Page 10 SECTION 502-303-101 CONNECTIONS When making any wiring changes in the bases, do not use screws securing terminal board as a bridging point or for storing leads (Fig. To restri c t the dial on the 220A hand 6.01 telephone set (only) place a strap between the pulsing contacts as shown in Fig.
- Page 11 "AI" LEAD AND {BK)INSIDE WIRE LEAD BECOMES "A" LEAD. SEE TABLES E AND F FOR ADDITIONAL CONNECTIONS. Fig. 18-AC1 Telephone Base Wiring Diagram (Early Model) Page 1 1 Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Jan 31,2012 22:01:32...
- Page 12 AND IBKI INSIDE WIRE LEAD BECOMES "A" LEAD. SEE TABLES E AND F FOR Fig. 1 9-AC1 Telephone Bose Wiring Diagram (Current Model) Page 1 2 BSP S02-303-101-i03_1972-09-12.jpg Scanned b y Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Jan 31,2012 22:01:59...
- Page 13 ISS 3, SECTION 502-303-101 N£ R£ CONN D5AL PI A TERMINAL SWITCH D 5 AN RINGER BOARD (NOTE (NOTE ·CORO ST A GRD DIAL (NOTE 41 LIGHT !NOTE [11) (II) 01 Al ll GHT (BK) TRNSf Tl P ( S -R) SOO!l (NOTE 3) [ Y)
- Page 14 SECTION 502-303-1 01 048W-29 t LINE ON N T ERMINAL SWITCH RINGER BOARD (NOTE 2) (NOTE 51 DIAL LIGHT ( N OTE (NOTE ( Y ) ( B K) (BK) (BK] L IGHT T RAN SF .( B L) (II) ( G ) ( G I ( R )
- Page 15 INDIV RING WIRE OR LEAD COLOR PARTY DENT WITH BRIDGED (NOTE I DENT (NOTE (NOTE Ring Inside Wire (AC1 only) TRNSF (Note TRNSF Ring Mtg Cord at Conn Block TRNSF (AD1 only) TRNSF Ringer Leads (Note 2 ) Handset Cord...
- Page 16 SECTION 502-303-1 01 TABLE D CONNECTIONS FOR 4-PARTY FULL SELECTIVE OR 8-PARTY SEMISELECTIVE RINGING USING 426N DIODE (SEE READ IN 1.01) LEADS WIRE OR LEAD -RING -TIP +RING +TIP COLOR RING Line Wire T I P Conn Block TRNSF T R N S F Mtg Cord RING Conn Block...
- Page 17 ISS 3, SECTION 502-303-101 TABLE E TABLE G CONNECTIONS FOR MESSAGE WAITING LAMP CONVERSION FOR 1A1, 1A2, AND 6A KTS AND DIAL LIGHT FEATURES (1A1, 1A2, WITHOUT DIAL LIGHT USING INSIDE WIRE AND 6A KTS), SEE NOTES AND D 4 BW-29 MOUNTING CORD (SEE READ IN 1.01) (SEE READ IN 1.01) TERMINAL BOARD...
- Page 18 SECTION 502-303-101 TABLE I P-90D231 POLARITY GUARD ASSEMBLY CONNECTIONS (AC1 OR AD1) TELEPHONE BASE AND 1220A OR 2220B HAND TELEPHONE SET (SEE READ IN 1.01) REMOVE CONNECT TO FROM WIRE OR COLOR LEAD POLARITY TERM. TERM. GUARD BOARD BOARD ASSY Term.
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