Bell System Practices AT&T 502 Reference page 12

FEATURES
(SIGNALING INCLUDED WITH ALL
FEATURES)
TURN KEY
RINGER
IN SET USED TO
USED AS
CUT OFF
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SSP 502-501-102-i02 _ 1971-07-12.jpg
511 C/0 LINE A N D RINGER CON NECTIONS (EXTERNAL CON NECTIONS)
EXCLUSION
KEY USED
TO CUT
OFF LINE LINE
1
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RING TIP RING
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«!:
a:!:
R G
R G
.
R G
R
G
y
R G
y
G
R
R G
TABLE H
EXTERNAL CONNECTIONS FOR MOUNTING CORD (NOTE 2, FIG. 7)
EXCLUSION
SIGNAL
2 CIRCUIT CIRCUIT
s
TIP GRD RING TIP
w
BR-BK
BL BR-Y
w
BL BR-Y BR-BK
w
BL BR-Y BR-BK
w
BL BR-Y BR-BK
w
BK BL BR-Y BR.-BK
w
BK BL BR.-Y BR.-BK
w
BK BL
COM OR
LINE 1 OR
CUTOFF PVT LINE
2 FOR LINE
CIRCUIT RINGER
RINGER
CIRCUIT
RING TIP RING TIP R
BK BR.-R BR.-G
y
y BK
y BK BR.-R BR-G
BR.-R BR.-G
BR-R
BR-R
"'
m
!l
0
z
"'
?
"'
�
KEY EGUIP.
OR STA
BUSY LAMP
CIRCUIT
3,
(NOTE
7)
FIG .
A OR At OR
8
BL GRD
w
0
0 w
w
0
0
w
0 w
0 w
BR-G
0 w
BR-G