AT&T 636CA Service

BELL SYSTEM PRACTICES
&
AT TCo Standard
636CA, 636CAM, 637DA, AND 637DAM TELEPHONE SETS
1. GENERAL
This section contains connection and maintenance
1.01
information for 636CA (MD), CAM (18-button)
and 637DA (MD), DAM (30-button) CALL DIRECTOR®
telephone sets equipped with headset jacks.
This section is reissued to:
1.02
Add information on 636CAM and 637DAM
•
(modular) telephone sets, Fig. 1
Show the 636CA and 637DA telephone set
•
MD.
2. CONNECTIONS
These sets are factory-wired for use with
2.01
1A1, 1A2, or 6A KTS line circuits.
may also be used with 1A KTS line circuits by
modifying the set as shown in Table A and B.
Line circuits for 1A, 1A1, or 1A2 KTS may be
connected to the same set under the following
conditions:
(a) 1A1 or 1A2 KTS lines must be connected
to the first key units 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, or 1A2 KTS lines appearing behind
a manual switchboard
intermixed on a CALL DIRECTOR telephone set
due to the different time out intervals provided
by the associated KTU's.
The 636CA, CAM and 637DA, DAM sets are
2.02
equipped with a 635A5C (5-line pickup and
hold) or 635AD5C (4-line pickup, cutoff, and hold)
key in the first module position.
assemblies [required with sets equipped with a
Dl20K (MD) or D200S (MD) mounting cord] differ
SERVICE
between the
replacement, the 635AD5C is furnished with a
piggy-back adapter to which the slate mounting
cord plug is connected. The necessary contact strip
assemblies (840151039 and 840151047) will be shipped
with the 635AD5C key, and will replace the 840151120
and 840151138 assemblies supplied with the 635A5C
key.
2.03
to the chaining switch. This requires a second tip
and ring to each module (except the last).
Fig. 2, sheets 1 through 5.
2.04
to the rear of the keys. This permits rearrangement
They
of line appearance either in the set or at the key
equipment distribution point.
sets are equipped with a satin-silver (-87) mounting
cord.
2.05
by removing the .812857738• (P-28E773) screw
detail from key positions involved and making the
necessary wiring changes per Table C.
2.06
2.07
should n o t be
(10 volt AC only) buzzer.
2.08
circuits, there are two optional circuits available.
The busy lamp(s) will light whenever a line pickup
button is depressed and the handset is off-hook or
the headset is plugged into the jacks. This optional
Contact strip
equipment must be ordered separately.
than one busy lamp is required, a 6C KTU must
NOTICE
Not for use or disclosure outside the
Bell System except under written agreement
Printed in U.S.A.
SECTION S02-61 0-418
two keys. If ordered for field
Because of the physical arrangement of the
635-type key, the contact strips do not extend
Mounting cords of these CALL DIRECTOR
sets terminate in individual plugs connected
All line key positions are convertible to
signaling or common signaling arrangements
These sets are not intended for use with
speakerphone systems.
The 636CA, CAM and 637DA, DAM telephone
sets are factory-equipped with a KS-20419L1
When station busy lamp feature is required
with these sets having 1A1 or 1A2 KTS line
Issue 5, April 1976
See
Current production
If more
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