Bell System Practices 1500D Reference Download

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BELL SYSTEM PRACTICES

Plant Series

REFERENCE

15000 AND 15548 TELEPHONE SETS

15000 TELEPHONE SET

Fig.

1-15000

and

15548

Telephone Sets

GENERAL

1.01

This section provides identification, installation,

IDENTIFICATION

Purpose

SECTION

502-502-1 01

Issue

February

1970

AT&TCo Standard

IIIII III

11m Iii

Iiiii I&

....

, ..

15549 TELEPHONE SET

maintenance, and connection information for

general purpose telephone sets previously contained
in Sections

502-510-111, 502-510-440,

and

502-510-431

which are hereby canceled.

2.01

General purpose TOUCH-TONE� dial desk
and wall-type telephone sets.

.\merican Telephone and Telegraph Company.

1970

Printed in

L" . .:-l

. .

-\.

BSP 502-502-101-101_1970-02-0l.jpg Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Jan 30,2012 22:38:24

Page

Summary of Contents for 1500D

Page 1: ...IIIIIIII 11mIii IiiiiI i sss 2 _ o c 15549 TELEPHONE SET maintenance and connection information for general purpose telephone sets previously contained in Sections 502 510 111 502 510 440 and 502 510 431 which are hereby canceled 2 01 General purpose TOUCH TONE dial desk and wall type telephone sets merican Telephone and Telegraph Company 1970 Printed in L l BSP 502 502 101 101_1970 02 0l jpg Scan...

Page 2: ...uard assembly see Table C Page 2 3 INSTALLATION 3 01 Exercise care not to damage line switch on early models of 1554B sets without line switch guard when drilling or driving screw in mounting hole 4 MAINTENANCE 4 01 Replaceable Apparatus Refer to Table B for component ordering guide Component parts should be maintained in accordance with section covering the particular item 4 02 To remove housing ...

Page 3: ...NG PARTY REFER TO TABLE D FOR CLASSES OF SERVICE NOT SHOWN INDICATES CURRENT COLOR CODE INDICATES MD COLOR CODE WITH 2 5A3 DIAL Fig 2 15000 Telephone Set Connections BSP 502 502 101 i01_1970 02 03 jpg Scanned by Frank Harrell Cowboy Frank Castle Rock Colorado Jan 30 2012 22 39 11 ISS I SECTION 502 502 101 Page 3 ...

Page 4: ... G DIAL LEADS MAY APPEAR ON F IN SETS EQUIPPED WITH 40100 NETWORK 4 LINE SWITCH OFF HOOK SEQUENCE I b e CLOSES 4 a b OPENS 121 d e CLOSES 51 f g OPENS 3 j k CLOSES 5 SET FACTORY WIRED FOR BRIDGED SERVICE REFER TO TABLE E FOR CLASSES OF SERVICE NOT SHOWN 6 REFER TO TABLE F FOR MODIFICATIONS FOR IAI OR IA2 KTS INSULATED AND STORED 0 BKI WITH 25W3 DIAL WITH 25A3 liD DIAL Fig 3 1 5548 MD Telephone Set...

Page 5: ...D053 Telephone set must be equipped with a 25W3 or 25Y3 dial as appropriate if intended for use with amplifying handset or 3 type speakerphone system ISS 1 SECTION 502 502 101 TABLE C POLARITY GUARD CONNECTIONS FOR 1500D AND 1554B TELEPHONE SETS DISCONNECT CONNECT FROM TO LEAD NETWORK NETWORK POLARITY GUARD Dial BK RR T Line Switch BR c s Polarity G RR Guard w c Depending on class of service set T...

Page 6: ... L2 L2 A A Line Switch W S W F F F c c BR S BR c c c F F Note To permanently silence ringer for all classes of service except identifying ground connect Y mtg cord lead with R mtg cord lead at conn block a For 1000 ohm ground insulate and store or place S R ringer lead on unused terminal b For 2650 ohm ground insulate and store or place BK ringer lead on unused termi nal Current color code MD colo...

Page 7: ...manently a For all classes except tip party with identifying ground remove BK ringer lead insulate and store or place on unused terminal b For tip party with 1000 or 2650 ohm identifying ground remove R ringer lead insulate and store or place on unused terminal TABLE F MODIFICAliONS FOR 1 A1 OR 1A2 KTS FOR 1554B TELEPHONE SETS WIRE OR LEAD DISCONNECT CONNECT FROM TO s A Line y 2 Ll Switch BR c 3 B...

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