TELEPHONE SETS 881A102, , 881C102, 881A103, , 881C103, 881A104, , AND 881C104

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1 BELL SYSTEM PRACTCES AT & TCo Standard SECTON ssue 3, January 1978 TELEPHONE SETS 881A12, , 881C12, 881A13, , 881C13, 881A14, , AND 881C14 1. GENERAL 1.1 This section provides identification, installation, and connection information for the 881A12 (MD), 881B12 (MD), 881C12 (Antique Gold**, Fig. 1); 881A13 (MD), 881B13 (MD), 881C13 (Mediterranean**, Fig. 2), and 881A14 (MD), 881B14 (MD), 881C14 (Early American**, Fig. 3) DESGN LNE* telephone (Cradle Phone) sets. *Trademark AT&TCo. **Trademark American Telecommunication Corporation 1.2 This section is reissued to: Add information on the 881C12, 881C13, and 881C14 (modular) telephone sets (Table A) Show 881B12, 881B13, and 881B14 telephone sets (MD). Warning: Telephone apparatus or wiring shall not be installed in a location where minimum separation from other wiring as specified in Section cannot be maintained. 1.3 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. 2. DENTFCATON 2.1.The 881A12, B12, C12, 881A13, B13, C13, 881A14, B14, and C14t (Rotary Dial) equipped telephone sets are new DESGN LNE telephone sets being made available to the customer. The customer buys the housing and handset from the telephone company and the Fig or 881C12 DESGN LNE Telephone Sett telephone company retains ownership of the transmission and signaling components. The B and C coded sets are equipped with a plug-ended H4DU handset cord instead of an H4EB cord. The C coded sets are equipped with an improved relay-type line switch capable of breaking both tip and ring sides of line when used in lal or 1A2 key telephone systems.t Ordering Guide (Refer to Table A) 2.2 Basic Telephone Se t Ordering nformation: Example: Set, Telephone, 881Cl2t is an antique gold cradle phone equipped with a rotary dial. NOTCE Not for use or disclosure outside the Bell System except under written agreement Printed in U.S.A. Page 1 BSP i3_ l.jpg Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Feb 8, :47:55

2 SECTON trefer to Table A for available codes and ordering information. 2.3 These telephone sets are intended to be used as single line or two-party desk sets and are not recommended for use on four- and eight-party service. 3. NSTALLATON AND CONNECTONS 3.1 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, a 225A adapter is required and must be ordered separately. Fig C13 DESGN LNE Telephone Set. 3.2 The internal connections for the 881Al2, 881Bl2, 881Al3, 881Bl3, 881A14, and 881Bl4 telephone sets, for nonkey system use, are shown in Fig. 7. nternal connections for the 881C12, 881C13, and 881C14 for nonkey and KTS use, are shown in Fig Connections for la KTS do not require any telephone set modifications and are wired same as for nonkey system use (all type sets). 3.4 Connections for use with lal or 1A2 KTS are shown in Fig. 8 for A and B coded sets and Fig. 9 for C coded sets. Table C includes necessary wiring modifications required for 1A1 or 1A2 KTS use (for A and B coded sets only). 3.5 To gain access to the interior of these sets for wiring changes, refer to appropriate paragraph in Part Line and Ringer Connections: Fig C14 DESGN LNE Telephone Set. (1) For single line and two-party service, refer to Table B. (2) For adjustments and ringer cutoff feature of the PA ringer, refer to Section Page 2 SSP S i3_ jpg Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Feb 8,212 18:48:1

3 SS 3, SECTON AVALABLE CODES AND ORDERNG GUDE TEL SET CODE TEL SET BASE DAL TRMTR UNT RCVR UNT MTG CORD CORD DESCRPTON 881C12 H4DU-58 Rotary Dial Antique Gold Cradle Phone 6U C or Tl 6UA-12 LBl D4BU-29 H4DU-3 Rotary Dial Mediterranean Cradle Phone 881C14 H4DU-3 Rotary Dial Early American Cradle Phone 4. REMOVAL OF TELEPHONE COMPANY-OWNED COMPONENTS BOTTOM COVER MOUNTNG SCREWS 4.1 When it is desired to discontinue telephone service of these DESGN LNE telephone sets, proceed as follows: Note: Remove the telephone company-owned components that can be easily removed. (1) Remove four bottom cover mounting screws from bottom of telephone set and remove bottom cover (Fig. 4). (2) Remove four telephone set base mounting screws and withdraw the base (Fig. 5). (3) Remove three dial mounting screws and remove the rotary dial (Fig. 6). (4) Unscrew transmitter and receiver caps and remove T1 transmitter and LB1 receiver units. (5) Replace bottom cover (Fig. 4). 4.2 Follow local procedures for returning telephone company-owned components. BOTTOM COVER MOUNTNG SCREWS Fig. 4-Current Model Telephone Set, Bottom View 4.3 When it is desired to return a set to Western Electric for repair, it should be packed using the D-186 Kit of Parts which contain packing materials and instructions. Page 3 BSP i3_ jpg Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Feb 8, :48:39

4 SECTON ttable B. LNE AND RNGER CONNECTONS t NDVO. WRE OR LEAD COLOR OR BRDGED RNG PARTY TP PARTY DENTFYNG GROUND NO DENT GROUND 1M? R R R R R R nside Wire at G G G G G G Jack y y y y y y BK B B B B B 623P4 Jack Ringer Line Switch (A and B Codes Only) Line Switch (C Codes Only) R A A Ll F F G Ll Ll A L2 L2 y G G G G G BK L2 L2 L2 * R K K K K K S R Ll s * Ll BK Ll G G G G y A A A L2 L2 w F F F B B w F F F B B BL c c c BL-W A A A BR L2 L2 L2 c c s L2 L2 L2 A A * nsulated and stored. t For access to set wiring follow applicable steps in Part 4. Page 4 BSP S i3_ jpg Scanned by Frank Harrell, Cowboy Frank) Castle Rock, Colorado Feb 8,212 18:48:53

5 SS 3, SECTON fig. 6-Removing Dial.TABLE C. MODFCATONS FOR 1A1 OR 1A2 KTS (A AND B CODES ONLY)* (SEE NOTE) NETWORK TERMNAL Fig. 5-.Removing Telephone Set Base LEAD COLOR REMOVE FROM CONNECT TO Line Switch 623P4 Line Jack Assy s A L2 y A L2 BR c G G Ll A w F c G Ll F Ringer BK Ll F For access to telephone set wiring follow applicable steps in Part 4. Note: For lal or 1A2 KTS (C code only), refer to Fig. 9, Note 3. Page 5 BSP i3_ S.jpg Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Feb 8,212 18:49:16

6 D (Q > m n z NSJO( ' WP[ 625-TYPE CONN BLK (TE 3) o au-zg MTG r.oro 623P JACK ASSY PA QJHCiCR {NOT( ) lin( SWTCH NETWORK DAL co soon soon (S) NOTES 1. SET WRED FOR NDVDUAL OR BRDGED RNGNG. 2. THC B COOE SETS ARC EQUPPED WTH A HOOULAR AND PLUC-CNOED HANDSeT CORD. THE A CODES ARE [QUPPED 'loi'th A CONVENTONAL AND CORD. 3, f CUSTOJo'E.R'S PfiDSES S PRE-WRED WTH A 54SA OR EQUVALENT JACX, NSTAll 225A AOAPTER WHCH ACCEPTS T 48U PlUG-f.NOEO MOUNTNG CORD, Jf NSULA leo AND STCREO OP - DAL PULSE CONTACT ON - DAL Off-NORMAL CONTACT SK 't;,,.. (NOTE > (Wl L (W RCVR. Fig A12, , 881A13, , 881A14, or Telephone Set, Connections. BSP i3_ jpg Scanned by Frank Harrel!, (Cowboy Frank) Castle Rock, Colorado Feb 8, :49:31

7 . D D <D NSO( 'WR( 625-TYP CONN BLK (NOTE 3) P4 HTG JACK CORD R (;----7 (;----7 (R) ) (;----7it NOTE:. SET WRED FOR NDVDUAL OR BRDGED RN GNG 2. TH( B CODE SCTS ARE EQUPPED WTH A MODULAR AND PLUG-EHO D HANDS(T CORD. THE A CODE SETS ARE EQU PP WTH A CONVENTONAL AND CORD L f CU SfOMER'S PREMSES S PRE-WREO \.41TH A 548A OR EQUVALENT JACK, NSTALL 2251\ AOAPTTR lot! CH ACCEPTS THE 4BU PLUG-ENDED MOUNTNG CORD. 4. TO PREVENT A FALSE 1-OLD CONDTON \.lien GOWG ON-HOOK 11-tE TP AND RNG LNt SWTCH CONTACTS Sl BREAK BEFORE THE "A" lead CONTACTS BREAK. * - NSULATED AND STORED Qp- DAL PULSE CONTACT ON- DAL OFFORfoiAL CONTACT PA LN( R NGER SWTCH (NOTE ) (NOTE 4) (R) t soon soon (Bit) i j (G) :* (w) (81() (G Y f * ( Y ) c (BR) :+( s ) (BK) NETWORK 7.J ' c ' " l 1 B l c, ' '.v \ GHj (Rl OR BL (B K)ORBL Ac li l } (W) DAL,., tw) - (W) ton '. (G OR (W Fig A12, , 881A13, , 881A14, or Telephone Set Wired for 1A1 or 1A2 KTS. BK t O P i r (NOTE P JACK H4U "" ;;; a z f.? BSP i3_1978-l-7.jpg Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Feb 8, :49:52

8 m n z NSOt WRE!NOTE 31 GRO OR A (Y) n, Y {'f) SPARE OR A(6Kl: 3'8'--'(-'-BK_)'--<-. 623P4 JACK PA RNGER NOTE LNE SWTCH NOTE 2 AND 3) NETWORt< DAL 6t6P JACK H4U CORD,. '?. AA:.,, NOTES:!. SET WRED FOR NDVDUAL OR BRDGED RNGNG. 2. WHEN USED WTH KTS, TO PREVENT A FALSE HOLD CONDTON WKE. GONG ON-KOOK, THE TP AND RNG LNE SWTCH CONTACTS MUST BREAK BEFORE THE"A"LEAD CONTACTS BREAK. - WHEN USED WTH la OR A2 KTS THE (BK) AND (Y) NSDE WRE LEADS AECOME A ANO A LEADS. THE {BR) LNE SWTCH LEAD- MJST Bt. '()V FROM L2 TO G ON N TRK. 4. F L.USTOMER'S PREMSES S PRruiREO WTH A 548A OR EQUVALENT JACK, NSTALL 225A ADAPTER l,.t\ch ACCEPTS THE D4BU PLUG-HDE l«lu!;t lng CORD. *- NSULATED AND STORED DP- DAL PuLSE CDr/TACT ON- DAL OFr -NORMAL CONTACT Fig C12, 881C13, or 881C14 Telephone Set, Connections BSP i3_ jpg Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Feb 8,212 18:5:1