LINE SWITCH
(
s-G
] d
SH I
(
Y
) I
S-Y
]
7C (MD),
OR
70
(MD)
425B
(
MD
)
OR 425E NETWORK
DIAL
I
!NOTE
11
DP
I
(BL OR G)
R R
(BR)
GN
ISS 3, SECTION 502-501-101
G
1-
OR G3- TYPE
"'"�"
ls-R]
NOTES:
)[S-BK)
I
•
FOR MANUAL SERVICE, MOVE (W)
I
S-W) LEAD FROM
F
TO RR TERMINAL,
2.
500
C/O FACTORY WIRED FOR RINC. PARTY.
501
C/0 FACTORY WIRED
FOR NEG AT
I
VC R ING PARTY. SEE TABLE
C
FOR CLASSES OF SERVICE
NOT SHOWN.
3,
L I Nf SWITCH OFF HOOK SEQU
EN
CE:
(I)
ab
BREAKS
(3)
be
MAKES
(2) de
MAKES
(4) IQ
BREAKS
4.
STATIONS WITHOUT ANI, ( R) TUBE LEAD MAY BE CONNECTED TO G IF
RINGER OPERATION IS MARGINAL. AT NEGATIVE STATIONS ON 96V
LONG LINE CIRCUITS, (R) LEAD SHOULD BE CONNECTED TO G.
*
SAME TERMINAL MAY APPEAR IN RINGER CONNECTIONS.
( ) CURRENT COLOR CODE
[ ]
MD COLOR CODE
D
P-DIAL PULSE CONTACT
ON
-D
I
AL OFF-NORMAL CONTACT
Fig. 6-500C/D and 501C/D Telephone Sets, Connections (Sheet 2 of 2)
BSP 502-501-101-i03_1972-07-ll.jpg Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Jan 29,2012 23:43:48
TPA
�42630
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