Bell System Practices AT&T 502 Reference page 10

.,
II
LEAD
a
OESIG
•
-
0
T
LtNE LINE
I
2
SIG CKT
GRO
NOTES'
I. (S-W) LINE SWITCH LEAD IS CONNECTED TO
0
I AL SETS AND TO RR TERMINAL IN MANUAL SETS.
2. EARLY MODEL SETS ARE EQUIPPED WITH DIOF(MD) OR DIOH(MD)
MOUNTING CORD AND CURRENT MODEL WITH DIOP.
3.
TWO-LINE PICKUP CONNECTIONS IN TABLE
ON LINE I. FOR EXCLUSION ON LINE 2, CONNECT (R-Y) AND (G-Y)
EXCLUSION KEY LEADS TO TERMINALS
4.
A 7-TYPE BUZZER ON A
RINGER AS A COMMON OR PRIVATE LINE AUDIBLE SIGNAL.
5. FOR RINGER CONNECTIONS, TERMINATE (W-S) OR (BR-BK) AND (S-W)
OR (BR-Y) LEADS TO LINE I OR 2 AT CONNECTING BLOCK.
BSP S02-501-102-i02_1971-07-10.jpg Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Jan 30,2012 00:04:45
(BL-W) (R]
(Y]
(BR-W)
(W- 0) [BL]
(BL)
t w t
to-w > [w]
r
TERMINAL IN
E
PROVIDE FOR EXCLUSION
3 4,
AND RESPECTIVELY.
448
BRACKET MAY BE SUBSTITUTED FOR THE
Fig. � l l A/B Telephone -5et Connedions, 2-Line Pickup, Signaling, and Exclusion
I O O O.n
(S-R)
A
2650fi
(R)
6. LINE SWITCH SEQUENCE, HANDSET REMOVED'
be- MAKES
de-MAKES
f g-BREAKS
DP-DIAL PULSE CONTACTS
ON- orr
Dl AL -NORMAL CONTACTS
( ) CURRENT COLOR CODE
[ ]
MD COLOR CODE
NETWORK
4 258
R
HANDSET
G3-TYPE
8-188004
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