Bell 503-200-108 Service Manual

BELLSYSTEM PRACTICES SECTION503-200-108
AT&TCo Standard Issue 2, March 1976

TELEPHONE SETS

881A102, 881B102, 881A103, 881B103, 881A104, AND 881B104

1. GENERAL

1.01 This section provides identification, installation,

and connection information for the 881A102

(MD), 881B102, (Antique Gold**, Fig. 1); 881A103
(MD), 881B103, (Mediterranean**, Fig. 2), and

881A104 (MD), 881B104 (Early American**, Fig.

3) DESIGN LINE* telephone (Cradle Phone) sets.

*Trademark AT&TCo.

**Trademark American Telecommunication Corporation

1.02 This section is reissued to:

• Add information on the 881B102, 881B103,
and 881B104 (modular) telephone sets (Table

A)

• Show 881A102, 881A103, and 881A104

telephone sets (MD).

Warning: TeIephone apparatus or wiring Fig. 1--$881B102 DESIGN LINE Telephone Set_l

shall not be installed in a location where
minimum separation from other wiring as
specified in Section 460-300-149 cannot be are equipped with a plug-ended H4DU handset cord

maintained, instead of an H4EB cord._

1.03 The customer's premises must be properly

wired with an appropriate connecting block Ordering Guide (Refer to Table A)

or jack in order to accept the D4BU-29 plug-ended

mounting cord or the 225A adapter shipped with 2.02 Basic Telephone SetOrderinglnformation:
each set.

2. IDENTIFICATION antique gold cradle phone equipped with a

2.01 SThe 881A102, B102, 881A103, B103, 881A104,

and B104_, (Rotary Dial) equipped telephone YRefer to Table A for available codes and

sets are new DESIGN LINE telephone sets being ordering information.
made available to the customer. The customer

buys the housing and handset from the telephone 2.03 These telephone sets are intended to be

company and the telephone company retains used as single line or two-party desk sets
ownership of the transmission and signaling and are not recommended for use on four- and
components. (Fig. 4 and 5). SThe B code sets eight-party service.

NOTICE

Not for use or disclosure outside the

Bell System except under written agreement

Printed in U.S.A. Page 1

Example: Set, Telephone, 881B102t is an

rotary dial.

SECTION503-200-108

Fig. 2--881A103 DESIGN LINETelephone Set i,:,_:i:i'_:_

Fig. 4--Customer-Owned Components

Fig. 3--881A104 DESIGN LINE Telephone Set

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3. INSTALLATION AND CONNECTIONS

3.01 These telephone sets are furnished from

the factory fully assembled and wired for

bridged ringing. To connect the telephone set,
plug the mounting cord into a 625A connecting

block or if the existing jack is a 548A or equivalent,
use the 225A adapter furnished with each set.

3.02 The internal connections for the 881A102,

881B102, 881A103, 881B103, 881A104, and

881B104 telephone sets, for nonkey system use, are
shown in Fig. 9.

3.03 Connections for 1A KTS do not require any

telephone set modifications and are wired

same as Fig. 9.

3.04 Connections for use with 1A1 or 1A2 KTS

are shown in Fig. 10. Table C includes

necessary wiring modifications required for 1A1 or

1A2 KTS use.

ISS 2, SECTION 503-200-108

NOTE:

LINE ALL
SWITCH NOT SHOWNARE

CUSTOMER-OWNED

TRANSMITTER
CONNECTORS

4228-TYPE
NETWORK

ASSEMBLY

H4DUHANDSET CARD
CORD(B CODE HOLDER

SETS ONLY) ASSEMBLY

3.05 To gain access to the interior of these sets 4. REMOVAL OF TELEPHONE COMPANY-OWNED

for wiring changes, refer to appropriate COMPONENTS

paragraph in Part 4.

3.06 Line and Ringer Connections: 4.01 When it is desired to discontinue telephone

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

to Table B.

(2) For adjustments and ringer cutoff feature to Fig. 5 for identification of company-owned

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

ASSEMBLY UNIT

PIA RINGER
AND RESONATOR

T_

6U-120 OR
6UA-t20

D4BU-29

MOUNTING

CORD

Fig. 5_l)Telephone Company-Owned ComponentMI

service of these DESIGN LINE telephone

sets, proceed as follows:

Note: Remove the telephone company-owned
components that can be easily removed. Refer

DIAL

T!

TRANSMITTER
UNIT

LB-TYPE
RECEIVER

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