BELL SYSTEM PRACTICES SECTION 503-200-1 01 AT&TCo Standard Issue 2, January 1975

TELEPHONE SETS

910A AND 2910A IDENTIFICATION, INSTALLATION, AND CONNECTIONS

1. GENERAL

1.01 This section provides identification, installation, and connection information fo r the 9 10A (Fig. 1) and 2910A (Fig. 2) DESIGN LINE* telephone (Stowaway) sets.

*Trademark

1.02 This section is reissued to:

• Add D-180600 Kit of Parts

• Add new Fig. 5 and 6, telephone company-

• Remove Uniform Service Order Code (USOC) fig. 2-2910A DESIGN LINE Telephone Set and D-kit of parts, Table A.

Warning: Telephone apparatus or wiring 1.03 The customer's premises must be properly shall not be installed in a location where wired with an appropriate jack in order to minimum separation from other wiring as accept the D4BU-29 plug-ended mounting cord specified in Section 460-300-149 cannot be and/ or 225A adapter furnished with each telephone maintained. set.

2. IDENTIFICATION

2.01 The 910A (rotary dial) and · 2910A (TOUCH-TONE® dial) equipped telephone sets are new DESIGN LINE telephone sets being made available to the customer. The customer buys the housing and handset from the telephone company and the telephone company retains ownership of the transmission and signaling components which are mounted on a removable base and incorporated in the handset (Fig. 4, 5, and 6).

Ordering Guide (Refer to Table A)

2.02 Basic Telephone Set Ordering Information:

fig. 1-910A DESIGN LINE Telephone Set Example: Set, Telephone, 910A10-50t is an ivory set with chrome trim and is equipped

© American Telephone and Telegraph Company, 1975 Printed in U.S.A. Page 1 SECTION 503-200-101

with a rotary dial and an oiled walnut 2.03 These telephone sets are intended to be applique (Fig. 1 and 3). used as single line or two-party common battery desk sets and cannot be used on four- and tRefer to Table A for available color and eight-party service. applique information. 2.04 Optional Components (order separately):

• D-180461 Guard Assembly (polarity guard)

• D-180460 Kit of Parts (bracket and two screws for polarity guard).

3. INSTALLATION AND CONNECTIONS

3.01 These telephone sets are furnished from the factory fully assembled and wired for bridged ringing . t The PlA ringer is shipped from the factory with the bias spring in the low bias position.. To connect the telephone set, plug the mounting cord into a 625A jack or if the existing Fig. 3-910A or 2910A DESIGN LINE Telephone Set jack is a 548A or equivalent, use the 225A adapter with Cover Closed furnished with each set.

Fig. 4-Customer-Owned Components

Page 2 ISS 2, SECTION 503-200-101

· H4DY CORD

LB·TYPE RECEIVER UNIT

42!SE NETWORK

NOTE; D48U-29 ALL OTHER COMPONENTS MOUNTING NOT SHOWN ARE CUSTOMER-OWNED. CORD

Fig . .s--,.Telephone Company-Owned Components (Set Equipment with a Rotary Dial).

3.02 The internal connections for the 910A and 3.06 . When installing polarity guard (D-180461) 2910A telephone sets, for nonkey system in 2910A telephone set, when instructed by use, are shown in Fig. 10 and 11, respectively. local administrative practices or procedures for end-to-end signaling purposes when battery and 3.03 Connections for 1A KTS do not require any ground reversals are encountered, refer to Table telephone set modifications and are wired E for connections .• saine as Fig. 10 and 11. 3.07 To install the D-180461 Guard Assembly proceed as follows: 3.04 Connections for use with 1A1 or 1A2 KTS are shown in Fig. 12 for 910A telephone set (1) Select the (840360408) bracket and two screws and Fig. 13 for 2910A telephone set. Table D from the D-180460 Kit of Parts and discard includes necessary wiring modifications required the remaining parts. for key telephone system use. (2) Install (840360408) bracket in the mounting holes between the line switch and 425K 3.05 To gain access to the interior of these sets network on the 2910A telephone set base plate. for wiring changes, refer to Part 4. Make sure the bracket tab fits into the square

Page 3 SECTION 503-200-101

H4DY CORD

,...... 225A ADAPTER

42!>K NETWORK

I. ALL OTHER COMPO NETS NO-T SHOWN ARE CUSTOMER-OWNED 2. IF POLARITY GUARD IS PROVIDED, IT IS COMPANY-OWNED.

Fig. ~Telephone Company-Owned Components (Set Equipment with a TOUCH-TONE Dial).

hole in the base plate. Fasten bracket firmly 4. REMOVAL OF TELEPHONE COMPANY-OWNED · to the base plate using the two screws from COMPONENTS the D-180460 Kit of Parts. 4.01 When it is desired to discontinue telephone (3) Mount D-180461 Guard Assembly to the service of the 910A or 2910A DESIGN LINE (840360408) bracket using screw which is telephone set remove the telephone company-owned furnished. components that are screwed to the base or can otherwise be easily removed. Refer to Fig. 5 and 6 for identification of company-owned components 3.08 Line and Ringer Connections: and proceed as follows:

(1) For single line and two-party service, refer (1) Unplug the cord from the handset and to Tables B and C. remove the handset from the telephone set.

(2) For adjustments and ringer cutoff feature (2) Cut the cord reel cord close to the plastic of the P1A ringer, refer to Section 501-259-101. grommet on the housing, Fig. 1 and 2.

Page 4 ISS 2, SECTION 503-200-101

• TABLE A. ORDERING GUIDE

DISPLAY DIAL TEL SET PLASTIC TRIM MTG TEL SET APPLIQUE INSERT DIAL CODE COLOR COLOR CORD CODE COLOR

910AD10-03 910A10-03 Oiled Chrome RTY Black Chrome 2910AD10-03 2910A10-03 Walnut None TT 910AD10-50 910A10-50 Oiled Chrome RTY Ivory Chrome 2910AD10-50 2910A10-50 Walnut None TT D4BU-29 910AD11-03 910A11-03 Mediter- Gold RTY Black Gold 2910AD11-03 2910All-03 ranean None TT 910AD11-50 910All-50 Mediter- Gold RTY Ivory Gold 2910AD11-50 2910All-50 ranean None TT

TABLE B

LINE AND RINGER CONNECTIONS (910A TELEPHONE SET) t

TIP PARTY INDIVID. RING WIRE OR LEAD COLOR OR I DENT GROUND PARTY NOIDENT BRIDGED GROUND 1ooon 265on R R R R R R Inside Wire G G G G G G at Jack y y y y y y BK B B B B B R A A Ll F F 623P4 Line G Ll Ll A L2 L2 Cord Jack Assy y G G G G G BK L2 L2 L2 * * R K K K K K S-R * * * * Ll Ringer s * * * Ll * BK Ll G G G G y A A A L2 L2 Line Switch w F F F B B

* Insulated and stored. t For access to set wiring, follow applicable steps in Part 4.

PageS SECTION 503-200-101

TABLE C

LINE AND RINGER CONNECTIONS (2910A TELEPHONE SET) t

TIP PARTY INDIVID. RING WIRE OR LEAD COLOR OR IDENT GROUND PARTY NOIDENT BRIDGED GROUND 10000 26500 R R R R R R Inside Wire G G G G G G at Jack y y y y y y BK B B B B B R A A Ll c c G Ll Ll 623P4 Line A L2 L2 Cord Jack Assy y G G G G G BK L2 L2 L2 * * R K K K K K S·R Ll Ringer Lead * * * * s * * * Ll * BK Ll G G G G y A A A L2 L2 Line Switch w F F c B B BR c c F F F

* Insulated and stored. t For access to set wiring, follow applicable steps in Part 4.

(3) Unplug the mounting cord from the base of (7) Reassemble metal housing base to the box the telephone set. end brackets. See Fig. 7 and 9.

(4) Remove the two screws, one at each end, from the metal housing base of the wooden 4.02 Follow local procedures for returning telephone box (Fig. 7). · company-owned components.

(5) Remove the four screws, two at each end, from the 910A or 2910A telephone set base 4.03 • When it is desired to return a set to {Fig. 8). Western Electric for repair, it should be packed using the D-180600 Kit of Parts which (6) Withdraw the base slowly from the housing contains packing materials and instructions .• (Fig. 9).

Page 6 ISS 2, SECTION 503-200-101

TABLED

MODIFICATIONS FOR 1A1 OR 1A2 KTS

(910A OR 2910A TELEPHONE SET)*

NET. TERM. LEAD COLOR REMOVE CONNECT FROM TO s A L2 y A L2 Line Switch BR c G G Ll A w F c 623P4 Line Cord Jack Assy G Ll F Ringer BK Ll F

*For access to set wiring, follow applicable steps in Part 4.

TABLE E

POLARITY GUARD CONNECTIONS FOR 2910A TELEPHONE SET (P-90DO 12 GUARD ASSEMBL VI*

DISCONNECT CONNECT FROM TO LEAD COLOR POLARITY NET NET GUARD Dial BK RR T

BR Line CD Switch w ® c s 623P4 Line Cord R ® Jack Assy Polarity G RR Guard w c

* For access to set wiring follow applicable steps in Part 4 CD If wired for bridged service or ring party. ® If wired for tip party with no identification ground, lAl KTS, or 1A2 KTS.

® If wired for tip party with identification ground.

Page 7 SECTION 503-200-101

HOUSING BASE

HOUSING BAS

fig. 7-Removing Metal Housing Base (910A or 2910A Telephone Set)

TELEPHONE SET BASE MOUNTI NG SCREWS

Fig. 8-Removing Telephone Set Base (910A or 2910A Telephone Set)

Page 8 ISS 2, SECTION 503-200-101

fig. 9_.2910A Telephone Set with Telephone Set Base Removed.

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