Bell 503-200-102 Service Manual

BELLSYSTEM PRACTICES SECTION 503-200-102
AT&TCo Standard Issue 1, June 1977

TELEPHONE SETS

902A1 AND 2902A1

1. GENERAL

1.01 This section provides identification, installation,

and connection information for the 902A1

(Fig. 1) and 2902A1 DESIGN LINE* telephone

(Seulptura) sets.

* Trademark AT&TCo.

1.02 Whenever this section is reissued, the reason

for reissue will be listed in this paragraph.

1.03 The customer's premises must be properly

wired with an appropriate connecting block

or jack in order to accept the D4BU-29 plug-ended
mounting cord or 225A adapter furnished with each
telephone set.

Warning: Telephone apparatus or Fig. 1--2902A1 Telephone Set

wiring shall not be installed in a
location where minimum separation

from other wiring as specified in 2.04 Optional Component (ordered

Section 460-300-149 cannot be separately):

maintained.

e 819040122 (P-90D012) Guard Assembly.

2. IDENTIFICATION 3. INSTALLATIONAND CONNECTIONS

2.01 The 902A1 (rotary dial) and 2902A1 3.01 These telephone sets are furnished from

(TOUCH-TONE ® dial) equipped telephone the factory fully assembled and wired for
sets are new DESIGN LINE telephone sets being bridged ringing. The P1A ringer is shipped from
made available to the customer. The customer the factory with the bias spring in the low bias

buys the housing and handset from the telephone position. To connect the telephone set, plug the
company and the telephone company retains mounting cord into a 625-type connecting block or
ownership of the transmission and signaling if the existing jack is a 548A or equivalent, use

components, the 225A adapter furnished with each set.

2.02 Refer to Table A for available codes and 3.02 The internal connections for the 902A1 and

ordering information. 2902A1 telephone sets, for nonkey system

2.03 These telephone sets are intended to be

used as single line or two-party desk sets 3.03 Connections for 1A KTS do not require any
and are not recommended for use on four- and set modifications and are the same as Fig.

eight-party service. 3 and 4.

Not for use or disclosure outside the

Bell System except under written agreement

Printed in U.S.A. Page 1

use, are shown in Fig. 3 and 4, respectively.

NOTICE

SECTION 503-200-102

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ISS 1, SECTION 503-200-102

TABLE B

LINE AND RINGER CONNECTIONS

(902A1 TELEPHONE SET)

TIPPARTY

WIRE INDIVID, RING NO IDENT

OR COLOR OR PARTY IDENT GROUND

LEAD BRIDGED _,,

R R R R R R

Inside G G G G G G

Wire at .....

Conn Slk y y y y y y

BK B B B B B

R A A L1 F F

GROUND

1000,_ 2650_.,

623P4 G L1 L1 A L2 L2

Line Cord y G G G G G
Jack Assy

Ringer

Line BL-W A A A ....* *

Switch

BK L2 L2 L2 * *

R K K K K K

S-R * * * * L1

S * * * L1 *

BK L1 G G G' G

W F F F B B

BL C C C * *

BR L2 L2 L2 C C

s L2 L2 L2 A A

•Insulated and stored.

3.04 If these telephone sets are to be used with (1) Unplug cords from set.
1A1 or 1A2 key telephone system the set

must be modified by moving the brown (BR) line Note: When both receiver and transmitter
switch lead from L2 to G of network, caps are removed the two-piece handset shell

3.06 When needed a polarity guard can be mounted
to the network mounting bracket. Refer to (2) Unscrew receiver cap and remove LB1

Table D for connections, receiver unit.

4. REMOVAL OF TELEPHONE COMPANY-OWNED (3) Unscrew transmitter cap and remove transmitter

COMPONENTS unit.

4.01 When it is desired to discontinue telephone

service of these DESIGN LINE telephone (4) Unscrew two (2) screws from top and six

sets, proceed as follows: (6) screws from bottom of base housing and

Note: Remove telephone company-owned
components that can be easily removed. Refer
to Fig. 2. (5) Remove line switch.

falls apart.

separate the two-piece base housing.

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