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Bell System Practices 636A Manual page 3

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Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado
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61
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HS (A)
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6
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• fig. 1-Current 636- and 637-Type (MD) Telephane Set, Cannectians •
Feb 04,2012 14:13:18
HEAD
TELEPHONE
SET
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(BR-R)
IOOOfi
(S)
*
FL
1600!1
(BL-V)
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TO FIG.
6
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(0-V)
40108
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RINGER
(S EE NOTE)
NOTE:
NIA RINGER SHOWN,TIA RINGER HAS SINGLE COIL
(5200 OHMS) AND ONLY (R) AND (BKI LEADS.
LEG END:
( ) CURRENT COLOR CODE
[ I MD COLOR CODE
*
INSULATED AND STORED
t
TERM. ON NETWORK
UNDESIGNATED TERM.
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TERM. ON 241-TYPE AMPL
ARE ON TERM. BOARD
-
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-DIAL PULSE CONTACTS
LS
Ll NE
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(A)
- 5 17A HEADSET JACK A
HS (B) - 5 17A HEADSET JACK B
F L
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LINE SWITCH OFF HOOK S EQUENCE:
de CLOSES
cb CLOSES
fg OPENS
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