Bell System 630A Service

BELL SYSTEM PRACTICES
AT&TCo Standard
1. GENERAL
This section contains connection and maintenance
1 .0 1
information for 18- and 30-button, rotary
dial, general purpose CALL DIRECTOR® telephone
sets.
This section is reissued to:
1 .02
Add connections for speakerphone with
•
external transmitter (even-count color-coded
cords)
Add reference
•
modification procedures
Change title of section from 630- and 631-type
•
telephone sets
Show all codes of these telephone sets are
•
now MD
Remove common maintenance information
•
which is now covered in Section 502-600-100.
2. CONNECTIONS
These sets are factory-wired for use with
2.0 1
1A1, 1A2, or 6A key telephone systems.
They may also be used with 1A KTS line circuits
by modifying the telephone set as shown in Table
A. Line circuits for 1A, 1A1, or 1A2 KTS may
be co�cted to the same set under the following
conditions:
(a) 1A1 or 1A2 KTS lines must be connected
to the first key module with 1A lines connected
to supplementary key modules.
(b) 1A, 1A1, or 1A2 KTS lines should not be
connected to the same 6 line key module.
(c) 1A, 1A1, and 1A2 KTS lines appearing
behind a manual switchboard should not be
intermixed on a CALL DIRECTOR telephone set
due to the different time out intervals provided
by the associated KTU's.
502-610-406-i02_1972·01-0l .jpg
SSP
Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Feb
630A, B, C, D AND 631A, B, C, D TELEPHONE SETS
to
Division 512 for speakerphone
@) American Telephone and Telegraph Company,
SERVICE
Tip, ring, A, and lamp leads of lines wired
2.02
for supplementary hold feature must be
routed per SD-69530-01 and Division 518 rather
than directly to the line circuit.
hold can be furnished in either of the following
arrangements.
I
(a)
Hold:
-24 volt (Fig. 7); connect stored (BR-V) [S-Y]
lead from first module plug to any spare mounting
cord lead using spare terminal or D-161488
connector. Mounting cord lead becomes SP lead
at key equipment (Fig. 7).
(b) Priority Hold:
657-type key in the first module with a 599H
or 657H key which is equipped with a second
hold button and wired per Fig. 8 to transfer
A
the lead from ground to -24 volt.
To convert a k e y position from pickup
2.03
(locking) to signal (nonlocking) remove the
screw detail P-10E837 entirely from plunger at
the key position to be converted. Make the necessary
wiring changes as shown in Table B.
At the key telephone system, connector cable
2.04
lead termination for sets equipped with
even-count color-coded cords differ from those for
sets equipped with MD color-coded cords (Fig. 3
a n d 4). If MD sets are replaced by current
production sets, it will be necessary to rearrange
the connector cable leads at the key telephone
system.
Some spade-tipped conductors or
mounting cord leads are insulated
with tubing which should be cut off
with electrician scissors or diagonal
pliers. Other conductors are insulated
with stiff plastic pockets. Pinch open
the pocket to release the spade tips.
t3-Type Speakerphone.
A 661A (MD) or 667-type speakerphone
2.05
transmitter unit may be used in the third
Printed in U.S.A.
04,2012 12:25:33
SECTION 502-61 0-406
Issue 2, January 1 972
Supplementary
A
Transfer lead from ground to
Substitute the 599- or
1972
Page 1