Bell 502-320-401 Service Manual

BELLSYSTEM PRACTICES SECTION 502-320-401
Plant Series Issue 2, February 1971

SERVICE

212L HAND TELEPHONESETS

!. GENERAL

1.01 Reissued to add nontechnical changes to

Fig. 1 and Table A.

AT&TCo Standard

am •_ MD

L,NE" TER...m C4Al 42_E_ SPAI__ "_ eA @ G"(V)

•,REI sT,,,,,alR,._.i .E_*O_K@ ,_ CAB'E_',HESWITC.@ DIA' m G3-T_E

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i ii II ¢ N ( -)N -,_ NI - I

GN ,-., . W

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TiP (G) L- , ,....i%|ll z P i

R,,.(R; _ 0 ) N

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NOTES:

I. DASHED LINES INOICATIr HANUAL SET CONNECTIONS. DP-OIAL PULSE

2. WIRED FOR BRIDGED RINGING, REFER TO TABLE A FORALL OTHER ON-OFF NORMAL
CLASSES OF SERVICE. LINE SWITCHSEQUENCE:

( ) CURRENT COLORCODE bc-MAKE ob-.OREAK
[ ] MD COLORCODE do-MAKE fO-MAKE

Fig. I--1212L Hand Telephone Set ConnectionsUsed With 685A SubscriberSet_l

M(-, |, 'r. _i.o_ .(::X

|

OR

© AmericanTelephoneandTelegraphCompany,1971

PrintedinU.S.A. Page 1

SECTION 502-320-401

$ TABLE A 41

LINE AND RINGER CONNECTIONS, 685A OR 686A SUB SET

WIRE OR NORMAL

LEAD COLOR OR PARTY RiNG STATION (NOTE)

, ,, , , , , ,,

USED WITH 212L HAND TELEPHONE SET

INDIV RING

BRIDGED (NOTE) CONNECTIONS

TIP PARTY IDINqT NEG [ POS

I0000 26500 1 AND 5 3 AND 7

,,

I

(O-W) RR RR RR RR RR RR

6 Pair (W-G) F F F F F F,

1/W (G-W) 1 1

Cable (W-BR) L2 " L2 L ,

(BR-W) 2 2

(R) L2 L2 K* B* G L2

Ringer

(BK) L1 G G B* G L2

(S) K* K* B* K* A* A*

(S-R) 1 1 B* G K* K*

Strap (BL) L1-F* L1-F* L1-F* L1-F* L1-F* LI-F*

Term.

Strip (BR)

To Net. [S-BR] L2-C* L2-C* 2-C* 2-C* L2-C* L2-C*

426A (Y) LZ G
Tube

(686A .

(R) G L2

Set) (BE) K K

Tip (G) L1 L1 L2 L2 L1 Li

Line Ring (R) L_ L2 L1 L1 L2 L2

Wire

Grd (Y) G G G G G G

.

Note: Reverse tip and ring for tip party service.
* Terminal on 425E network.

( ) Current color code

[ ] MD color code

,,,

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