Bell System Practices 660A1 Connections page 5

APPARATUS
Line
Switch
Dial
Ringer
Strap
DlOR
Mounting
Cord
(Note 2, 3)
Note 1.
Note 2.
Note 3.
Note 4.
*
Insulate and store.
t
Use D-161488 connector.
BSP 512-730-450-i05_1 979-Q9-QS.jpg
Scanned b y Frank Harrell, (Cowboy Frank) Castle Rock, Colorado
2660A1 TELEPHONE SET EQUIPPED WITH M1A OR M1B RINGER­
MODIFICATION FOR 4A SPEAKERPHONE
WIRE OR LEAD
LEAD
DESIG
R
T
Al
A-AG
Tl
IR
IT
LK
Terminals on network unless otherwise noted.
Replace D6AF mounting cord with DlOR mounting cord (order separately).
Insulate and store (G-W) and (W-S) mounting cord leads.
4A speakerphone system is not designed for tip party identification service.
INDIVIDUAL
OR BRIDGED
CO LOR (NOTE 1)
•
(BK)
(Y )
G
(S) Connect
(G)
(W)
(G) A
(G) TBI-7 to L2
(BL-W) L2
(W-BL) A
( O-W )
G
*
(W-0)
(W-G)
(BR-W)
( W -BR)
(S-W) Connect to (S) line switch lead
Feb 23, 2012 22:22:07
ISS 5, SECTION 512-730-450
TIP PARTY
RING PARTY WITHOUT
1)
I DENT.
(NOTE
(Note 1, 4)
•
A
to
(S·W) mounting cord lead
L2
c
G
TBI-7 to G
L2
G
A
*
t
Connect to (0) dial lead
(V) t
Connect to dial lead
*
t
*
G
t
A
L2
A
G
•
Page 5