Bell 503-200-104 Service Manual

BELLSYSTEM PRACTICES SECTON503-200-104
AT&TCo Standard Issue2, February 1975

TELEPHONE SETS

940-TYPE

IDENTIFICATION, INSTALLATION, AND CONNECTIONS

1. GENERAL

1.01 This section provides identification, installation,

and connection information for the 940A,

940B, and 940C (Fig. 1) DESIGN LINE* telephone

(Celebrity) sets.

* Trademark

1.02 This section is reissued to:

e Add D-180600 Kit of Parts

e Add new Fig. 4, telephone company-owned

components

e Remove Uniform Service Order Code (USOC)

and D-Kit of Parts, Table A

Warning: Telephone apparatus or wiring

shall not be installed in a location where Fig. l1940-Type DESIGN LINETelephone Set
minimum separation from other wiring as
speciHed in Section 46_30_149 cannot be

m_dnt_dned. Ordering Guide (Refer to Table A)

1.03 The customer's premises must be properly 2.02 Basic Telephone SetOrderinglrfforma_on:

wired with an appropriate jack in order to

accept the D4BU-29 plug-ended mounting cord
and/or 225A adapter furnished with each telephone Example: Set, Telephone, 940A40-50t is an

set. ivory set equipped with a rotary dial and a

2. IDENTIFICATION applique information.

2.01 The 940A, 940B, and 940C rotary dial equipped used as single line or two-party common

telephone sets are new DESIGN LINE battery desk sets and cannot be used on four- and

telephone sets being made available to the customer, eight-party service.
The customer buys the housing, handset, and
decorative features from the telephone company 3. INSTALLATIONAND CONNECTIONS

and the telephone company retains ownership of
the transmission and signaling components which 3.01 These telephone sets are furnished from
are mounted on a removable base and incorporated the factory fully assembled and wired for

in the handset (Fig. 2, 3, and 4). bridged ringing. $The P1A ringer is shipped from

© American Telephone and Telegraph Company,1975

Printed in U.S.A. page 1

chrome trim applique (Fig. 1).

t Refer to Table A for available color and

2.03 These telephone sets are intended to be

SECTION503-200-104

jack is a 548A or equivalent, use the 225A adapter

furnished with each set.

3.02 The internal connections for the 940-type

telephone sets nonkey system use is shown

in Fig. 7.

3.03 Connections for 1A KTS do not require any

telephone set modifications and are wired

same as Fig. 7.

3.04 Connections for use with 1A1 or 1A2 KTS

are shown in Fig. 8. Table C includes

necessary wiring modifications required for 1A1 or

1A2 key telephone system use.

3.05 To gain access to the interior of these sets

for wiring changes, refer to Part 4.

3.06 Line and Ringer Connections:

(1) For single line and two-party service, refer

to Table B.

Fig. 2--Customer-Owned Components 940A or 940B

Telephone Set (2) For adjustments and ringer cutoff feature

of the P1A ringer, refer to Section 501-259-101.

4. REMOVAL OF TELEPHONE COMPANY-OWNED
COMPONENTS

4.01 When it is desired to discontinue telephone

service of the 940-type design line telephone

set proceed as follows:

$Note: Remove the telephone company-owned

components that are screwed to the base or

can otherwise be easily removed. Refer to

Fig. 4 for identification of company-owned
components.41

(1) Remove handset cord from handset and

telephone set base.

(2) Remove mounting cord from telephone set

Fig. 3---Customer-Owned Components,940C Telephone

Set (3) Remove three housing mounting screws

the factory with the bias spring in the low bias
position._l To connect the telephone set, plug the (4) Remove upper and lower housing by lifting

mounting cord into a 625A jack or if the existing them off.

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base and wall jack or adapter.

located on bottom outer edge of the baseplate

(Fig. 5 or 6).

ISS 2, SECTION 503-200-104

Fig. 4---OTelephone Company-Owned Components_l

STABLE A(I

ORDERING GUIDE

TEL SET DISPLAY

CODE CODE

TEL SET DIAL

940A40-50 940AD40-50 Chrome Chrome
940B40-50 940BD40-50 Ivory Gold Gold
940A40-62 940AD40-62 Chrome Chrome

........ Blue H4DU-62

940B40-62 940BD40-62 Gold Gold
940C40-50 940CD40-50 Chrome Chrome

940C41-50 940CD41-50 Gold Gold
940C40-62 940CD40-62 Chrome Chrome

940C41-62 940CD41-62 Gold Gold

..,

PLASTIC DIAL INSERT TRIM HANDSET MTG

COLOR COLOR COLOR CORD CORD

H4DU-50

8H D4BU-29

Ivory H4DU-50

Blue H4DU-62

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