Bell System Practices AT&T 502 Reference page 18

51 GNAL
C RCU
I I T
NOTES'
I ,
SETS ARE FACTORY W I R ED TO PROVIDE BRIDGED RING I NG SERVICE. R I NGER CONNECTIO NS PROV I D E
FOR RING ! " G O N LINE I , F O R R I N G I N G O N LINE 2 , CONNECT (R ) AMl (BK ) R I NGER LEADS TO
3
TERMINALS AND
2 . TO S ILENCE RINGER PE RMANENTLY, CONNECT ( R ) AND (BK) RINGER LEADS TO A AND K OF NETWO RK.
3.
LINE 51/ITCH SEQUENCE, H A MJSET RE)o()VEDo
d e -MAKES
b e -MAKES
4.
L1 NE KEY SEQUENC E '
L I NE I TO LINE 2
BSP 502-S01-102-i02_1971-07-18.jpg Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Jan 30, 2012 00:08:03
PUSH
(WI
( W I
(BL)
(BL)
4
RESP ECTIVELY.
f g - BREAKS
I
o b - MAKES g -BREAKS
gh-MAKES
cd- BREAKS d e - MAKES j k -BREAKS
Fig. 11-5158 Telephone Set, Connedions
C4A 9C
SWITCH
: L I N E
RINGER
(NOTE 3)
DIAL
N T S
( O E I
AND 2 1
( B R I
( R )
( B K I
DP-
D I AL PULSE C<J<TACTS
ON-
DIAL OFF-NORMAL CONTACT
425E
TW K
N E O R
( B K }
TRMTR
.
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. .
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. . . .
. . . · .
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