LINE-\IIRE
TIP
(G)
R lNG
(BK)
A I
(Y)
ISS
3,
SECTION S02-580-405
625A
I
D4BU
CONN,BLK
MTG,CORD
(NOTE 8)
(G)
JACK
425E NET.
RINGER
LINE
S\IITCH
(NOTES 4 AND 6)
7-
TYPE (MD)
OR 9-TYPE
DIAL
623D4
4228A OR
C4-TYPE
(NOTES I ,2,
DP
(R)
(R)
(BK)
(BK)
(Y)
(Y)
L2
0
A
ll
(G)
(II)
(Y)
(W)
(W)
I. SET WIR(O fOR
l
A
I
OR IA2 KTS WITH
INDIVIDUAL {BRIDGED) RINGING. TO PR OVIDE SEPARATE R INGER MOVE:
FROM
TO
•
(BK)
RINGER LEAD
Ll
e (R) RINGER LEAD
K
G
INSULATE AND STORE
(BR)
AND (Y)
ll
NE S\IITCH LEADS WHEN USING TERMINALS
ll
AND G FOR
TIE POl NTS BETWEEN RINGER AND MOUNTING CORD LEADS.
2. FOR MANUAL SERVICL
SEPARATE RINGER- MOVE MOUNTING CORD CONDUCTOR (G) FROM TERMINAL f TO RR ON NETWORK.
IAI OR IA2 KTS- MOVE MOUNTING CORD CONDUCTOR (G) AND (BK) RINGER LEAD fROM TERMINAL
f TO RR ON NETWORK.
REPLACE DIAL WITH APPROPRIATE APPARATUS BLANK.
ON
3.
WHEN BOTH FEATURES ARE REQUIRED, REPLACE
623D4 JACK
WITH
DGAA-TYPE COA!J AND 123A APPARATUS BLANK, AND
CONNECT (Bl) AND
(II)
LEADS TO (BK) AND (R) RINGER LEADS, RESPECTIVELY. USE D-1 61488 CONNECTORS.
THE
SET IS NO
LONGER MODULAR AFTER
THIS
MODIFICATION.
4. TO
PREVENT F ALSE HOLD C ONDITION
WHEN HMDSET IS
RESTORED, SWITCH CONTACTS
d, e
MUST BREAK BEFORE b,
c
BREAK.
5.
CONNECTIONS fOR C4B RINGER SHOWN.
SETS
WITH
C4A
RINGER WIRED AS FOLLOWS•
•
(BK) TO f
e(S)TO K
e (S-R) TO A
e (R) TO L2
6. LINE SWITCH SEQUENCE, HANDSET REMOVED.
(I)
be
MAKES
(3)
fg
BREAKS
(2)
de
MAKES
7.
TO SILENCE RINGER PERMANENTLY, DISCONNECT (BK) RINGER LEAD INSULATE AND STORE.
8. H4DU HANDSET CORD AND D4BU MOUNTING CORD ARE ORDERED SEPARATELY.
DP- DIAL PULSE CONTACT
ON- DIAL OFF-NORMAL CONTACT
Fig. 4--t500LM/MM Telephone Set, Connections.
Page 5
5 Pages
BSP 502-580-405-i03_1975-11-QS.jpg Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Feb 04, 2012 12:11:06
