BELL SYSTEM PRACTICES
AT&TCo Standard
SECTION 502-61 0-406
Issue 2, January 1 972
SERVICE
630A, B, C, D AND 631A, B, C, D TELEPHONE SETS
1.
GENERAL
1 .0 1
This section contains connection and maintenance
information for 18- and 30-button, rotary
dial, general purpose CALL DIRECTOR® telephone
sets.
1 .02
This section is reissued to:
•
Add connections for speakerphone with
external transmitter (even-count color-coded
cords)
•
Add reference
to
Division 512 for speakerphone
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
2.0 1
These sets are factory-wired for use with
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
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.
2.02
Tip, ring, A, and lamp leads of lines wired
for supplementary hold feature must be
routed per SD-69530-01 and Division 518 rather
than directly to the line circuit. Supplementary
hold can be furnished in either of the following
arrangements.
(a)
I
Hold:
Transfer
A
lead from ground to
-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:
Substitute the 599- or
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
the
A
lead from ground to -24 volt.
2.03
To convert a key position from pickup
(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.
2.04
At the key telephone system, connector cable
lead termination for sets equipped with
even-count color-coded cords differ from those for
sets equipped with MD color-coded cords (Fig. 3
and 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.
2.05
A 661A (MD) or 667-type speakerphone
transmitter unit may be used in the third
@) American Telephone and Telegraph Company,
1972
Printed in U.S.A.
Page 1
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Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Feb
04,2012 12:25:33
