Bell System Practices AT&T 502 Reference page 5

FEATURES
EX-
RINGER CLUSION
IN SET KEY
USED TO
USED AS
CUT OFF
:0
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0
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1
1
( ) Current color code.
[ ] MD
color code.
*Strap connected to A of network.
Note:
Refer to notes 3, 4, and
FEATURES
(RINGER IN SET
AS
USED
LINE RINGER)
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0"-
0
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1
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to
notes 2, 3, 4, and 5, Fig.
Note: Refer
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CONNECTIONS TO TERMINALS IMSIDE SET
MOUNTING
CORD
LEADS
ffi�
(B« ) (W)
��
(R) (G) (Y) (BL)
[R·Y]
2 E1 E2 6
1 5
1 2 E1 E2 5 6
6, Fig. 4.
5 1 0A/B LINE AND RINGER CONNECTIONS (EQUIPPED WITH 4-CONDUCTOR MOUNTING CORD)
CONNECTIONS FOR URMINALS INSIDE SET
TURN KEY
USED TO
MOUNTING
CUT OFF
CORD
LEADS
��
=�
g�
ww
�.., y
R G
"'"'
ii:!
L2
L1 5
L2 L1
5
L2 L1
3
L2 L1 3
L2 L1 3
I
2 3
6.
TABLE B
502A/B LINE A N D RINGER CONNECTIONS
C4A
EXCLUSION
RINGER
KEY
LEADS
LEADS
(NOTE)
(Y) (W)
(BK) (BL) (R) (BK) (S)
[G·Y]
L2 L1 E1 E2 1 2 K
4 3 E2 3 E 1 4 A
TABLE C
C4A
TURN
RINGER
KEY
LEADS
LEADS
(NOTE)
s-; R
s
BK S·R BK
6 L2 L1 L2 L1 K
6
L2 L1 1 2 K
4 L1
L2 L2 L 1 K
4 L2 L 1 3
4 K
4 G L2 L1
R K
4 L1 1 K
L2 2
EXTERNAL CONNECTIONS FOR
MOUNTING CORD
C4B
EX·
RINGER
LINE CLUSION
LEADS
CIRCUIT
(NOTE)
(S·R) (S)• (BK) (R) RING TIP RING
A 1 2 K R G y
A 4 A
E1 G
EXTERNAl CONNECTIONS FOR
MOUNTING CORD
LINE LINE
2
1
S·R RING TIP RING TIP
A G
R
A R G
A R G
A
R G
A R G
A R BK
G y
COM KEY
OR
EQUIP.
PVT OR STA
LINE BUSY'
RINGER LAMP
CIRCUIT CIRCUIT
TIP R A OR A1 OR
BL GRD
w
BK BL
w
y BK BL
SIGNAL CUTOFF
CIRCUIT
CIRCUIT
s
GRD RING TIP
y BK
y BK
y BK
y BK
y BK