SECTION 502-580-405
D
4
BJ
MTG CORD
TIP
(G)
RING (R)
TER�
STRIP
G3-TYPE
H ANDSET
425E
NETWORK
c
C4-TYPE
RINGER
(NOTES I,
LINE
SWITCH
(NOTES
4
AND
6)
(S)
7-TYPE (MD)
OR 9-TYPE
DIAL
(BL)
A (BK)
6
AI
.r�
C2!
NOT£S:
(BK)
(w)
(R)
(w)
B
GN
I. SET WIRED r0111 AI 011 IA2 WITH BRIDGED RINGER. TO PROVIDE
SEPARATE R I HGER NOVE:
rRDN
TO
•
(BK) RINGER LEAD
r
3
•
(S) STRAP LEAD
L2
4
• (Y)
NTG CORD LEAD
5
3
•
(BK) NTG COIID LEAD
6
4
1r
CAPACITOR IS NOT REQUIRED IN SERIES WITH RINGER
NOYE
(R) RINGER LEAD rRDM K TO A,
2.
rOll
NAHUAL SERVICE:
SEPA.ATE RINGER
•
NOVE MOUNTING CORD CONDUCTOR
(G)
rROM TERMINAL r TO RR ON NETWIIK.
IAI OR IA2 KTS
•
NOVE NOUNTING CORD CONDUCTOR
(G)
AND (BK) RINGER LEAD rROM TERNINAL r TO RR ON
NET\IOIIK,
REPLACE DIAL WITH APPARATUS BLANK.
3.
WHEN BOTH rEATURES ARE REQUIRED,RfPLAC£ 4·CONDUCTOR
MOUNTING CORD WITH &·CONDUCTOR MOUNTING CORD AND
CONNECT (BL) AND
(II)
LEADS TO (BK) AND (R) RINGER LEADS,
RESPECTIVELY .US£
0·161488
CONNECTORS
OR
SPARE TERNINALS.
(S-BK)
(S-R)
(w)
4. TO PREVENT rALS£ HOLD CONDITION WHEN HANDSET IS
RESTORED,S\IITCH CONTACTS
b, c
MUST BREAK BErOR£
d, e BREAK.
ON
5.
CONNECTIONS roR C4B RINGER SHO\IN.SETS WITH C4A RINGER
WIRED AS rOLLOWS:
•
(BK) TO r
•
(S) TO K
•
(S·R) TO A
•
(R) TO L2
6,
Ll NE S\11 TCH SEQUENCE, HANDSET REMOVED,
(I)
be
MAKES
(3) ab
BREAKS
(2) de �AKES
(4)
g f
BREAKS
7.
TO SILENCE RINGER PERMANENTLY DISCONNECT (BK) RINGER
LEAD.INSULAT£ AND STORE
lt
INSULATE AND STORE
0 p
-
DIAL PULSE CONTACT
ON
-
DIAL orr-NORMAL
Fig.
l
.....
Early 500L/M Telephone Set, Connections With MD Line Switch and Lead Colors.
Page 2
BSP 502-580-405-i03_1975-ll-02.jpg Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Feb 04,2012
12:09:45