Bell System Practices AT&T 502 Reference page 7

LEAD DESIG
2
LINE
LINE I
G
SIG
D
R
CKT
NOTES'
I. (W) [S-W] LINE SWITCH LEAD IS CONNECTED TOr TERMINAL IN D I AL SETS AND T O R R
TERMINAL I N MANUAL SET S .
2. SETS A R E FACTORY WIRED FOR BRIDGED RINGING SERVICE. CONNECTIONS F O R C48 RINGER SHOWN.
IF C4A RINGER IS USED, WIRE AS
REMOVE (S)
3.
RINGER CONNECTIONS PROVIDE FOR RINGING ON LINE I . FOR RINGING ON LINE 2, CONNECT (BK)
RINGER LEAD
4 . A 7-TYPE BUZZER O N A 4 4 B BRACKET M A Y BE SUBST I T UTED F O R T H E RINGER AS A COMMON O R
PRtVA.TE LINE AUDIBLE SIGNAL .
TO
5. SILENCE RINGER PERMANENTLY, REMOVE (BK) RINGER LEAD FROM TERMINAL 2,
6. 5 1 0A AND 8 SETS ARE EQUIPPED \liTH D4BJ MTG CORD
510E AND F SETS ARE EQUIPPED WITH D6AA MTG CORD.
BSP 502-S01·102-i02_1971-07-07.jpg Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Jan 30, 2012 00:03:35
LINE KEY
( BK)
(G)
(R)
(YI
t
BLI
'twJ
( WI
E l
0
E2
0
FOLL :
(BK)
OW TO 2 OF TER,.
S
K
TO NETWORK
(S)
(S-R) TO A OF
I
.
(R) TO OF TERM.
AND I OF TE
STRAP FROM A OF NETWORK RM
4
AND (S) STRAP LEAD TO TERMINALS AND
Fig. 5-510A/B and E/F Telephone Set Connedions, Wired For 2-Line Pickup and Signaling
.
E
LINE SWITCH
T MS
R
{NOTE
ON
NET.
-
(G S
I [ G]
[ S - G ]
(G-BKI
Ll
(S-RI
(YI [S-Y]
G
0
3650!1 �
( K
B I
( R)
(SI
S
T P
RI
NETWORK
STRIP
STRIP.
3
RESPECTIVE L Y .
I NSULATE AND STORE.
\IHICH DOES NOT PROVIDE SIGNAL CKT LEADS.
7C,
7D
9C
7)
OR
DIA'-
-
S
(BRI [ BR]
(RI [S-R]
( B KI [S-BK]
(WI
C4-TYPE RINGER G3 -TYPE
( NOTES 2,3,4, H ANDSET
AND 5
I
7.
LINE SWITCH SEQU ENCE, HANDSET REMOVED'
be-MAKES
de-MAKES
ab-BREAKS
-BREAKS
fg
P -
0
DIAL PULSE CONTACTS
0 N -
DIAL Orr -NORMAL CONTACTS
( ) - CURRENT COLOR CODE
-
MD COLOR CODE
[ ]
425E N E T W O R K
GN
� 'i oc �
TRMTR
RCVR
in
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"'
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!:l
0
z
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s
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