Bell System Practices AT&T 502 Reference page 22

(SIGNAliNG INCLUOEO WITH All FEATURES)
RINGER
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558C/D LINE AND RINGER CONNECTIONS
FEATURES
EXCLUSION
TURN KEY USED TO
CUT OFF USED TO
CUT OFF
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TABLE M
(INSIDE WIRE CONNECTIONS)
KEY
liNE liNE
2
1
RING TIP RING TIP
L2 L1
L2 L 1
L2 Ll
L2 Ll
L2 L1
L2 Ll
L2 Ll
1 2 3 4
1 2 3 4
• 2 4
1 3
CONNECTIONS TO INSIOE WIRE IN SET
SIGNAL EXCLUSION CUTOFF
CIRCUIT CIRCUIT CIRCUIT
s
GRD RING TIP RING TIP
8
OR R OR
5
8 7 6 3 4
8 7 5 6
8 7 5 6 3 4
8 7 5 6 3 4
8 7 5 6
8 7 5 6 3 4
8 7 5 6 3 4
8 7 5 6
8 7 5 6
8 7
KEY EQUIP.
COM OR
PVT
OR STA BUSY
liNE
LAMP CKT
3,
RINGER
(NOTE
CIRCUIT
FIG. 14)
R 8 l or A1 or
Bl GRD
9 12
9 12
9 12
E1 E2 9 12
E1 E2 9 12
E1 E2 9 12
9 12
9 12
E1 E2 9 12
E1 E2 9 12