Bell System Practices AT&T 502 Reference page 21

L I NE
2
L I NE
I
NOTE S :
I . (Wl [S-W ) L I N E S W I TCH LEAD I S C O N N E C T E D TO F T E R M I N AL IN D I A L
S E T S AND R R T E R M I N A L I N M A N U A L S E T S ,
2.
SETS ARE FACTORY WIRED TO PROVIDE BRIDGED RINGING SERVICE. CONNECTIONS
SHOWN PROV IDE FOR RINGING ON LINE
{BK) RINGER LEADS TO TERMINALS 3 AND 4 , RESPECTIVELY.
3.
A 7-TYPE BUZZER ON A 44B BRACKET MAY B E SUBST I TU T E D FOR THE RINGER
AS A COMMON OR P R I VATE LINE AU D I B L E S I GNAL .
4. TO S I LENCE R I NG E R P E R MANENTLY C O N N E C T ( BK) AND { R
TERMINALS K AND A ON NETWORK.
!5.
LINE SWITCH SEQUENCE, HANDSET REMOVED:
be-
MAKES
d e -
MAKES
"II
D
ca
ct
�
BSP 502-501-102-i02_1971-07 -21.jpg
Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Jan 30, 2012 00:09:14
LINE
KEY
(BK)
(5-Gl
(G
)
( R
)
FOR RINGING ON LINE
I. 2,
RINGER LEADS TO
)
ob-
BREAKS
f g- BREAKS
Fig. 1 3-- S SBA/8 (MD) Telephone Set Connedions, 2-Line Pickup and Signaling
C4A L I N E SWITCH
R I NGER 5)
{ NOTE
2,3,4)
{NOTES
(W) CS-WJ
(GI (5-GJ
e
( B K l
(5-Y]
(Y)
� +
(BKI (5 -BK]
( ) CURRENT
COLOR CODE
( ) MD COLOR
CONNEC T ( R ) AND
CODE
*
I N SULATE AND STORE
OP-DIAL PULSE CONTACTS
ON- DIAL OFF-NORMAL CONTACTS
42!58 NETWORK
I)
(NOTE
(BL)
GN
( W I
TRMTR
RCVR
G3-TYPE HANDSET 8 -188001