AT&T 636CA Service Manual

BELL SYSTEM PRACTICES
AT&TCo Standard
I. GENERAL
This section contains connection and maintenance
1 .01
information for 636CA (18-button) and 637DA
(30-button) CALL DIRECTOR® telephone sets
equipped with headset jacks.
This section is reissued to:
1.02
•
Revise 3.03
•
Add information on D-180463 Kit of Parts,
2.08 and Fig. 3
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 m a n u a l s w i t c h b o a r d s h o u ld n o t b e
intermixed o n a CALL DIRECTOR telephone set
due to the different time out intervals provided
by the associated KTU's.
The 636CA and 637DA sets are equipped
2.02
with a 635A5C (5-line pickup and hold) or
635AD5C (4-line pickup, cutoff, and hold) key in
the first module position. Contact strip assemblies
[required with sets equipped with a D120K (MD)
or D200S (MD) mounting cord]
two keys. If ordered for field 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
BSP 502-610-418-i04_1975-03-0l.jpg Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado
SERVICE
636CA AND 637DA TELEPHONE SETS
They
differ between the
©
American Telephone and Telegraph Company,
Printed in U.S.A.
Feb 04,2012 14:33:52
and 840151047) will be shipped with the 635AD5C
key, and will replace the 840151120 and 840151138
assemblies supplied with the 635A5C key.
Because of the physical arrangement of the
2.03
635-type key, the contact strips do not extend
to the chaining switch.
and ring to each module (except the last).
Fig. 2, sheets 1 through 5.
Mounting cords of these CALL DIRECTOR
2.04
sets terminate in individual plugs connected
to the rear of the keys. This permits rearrangement
of line appearance either in the set or at the key
equipment distribution point.
sets are equipped with a satin-silver ( -87) mounting
cord.
All line key positions are convertible to
2.05
signaling or common signaling arrangements
by removing the P-28E773 screw detail from key
positions involved and making the necessary wiring
changes per Table C.
These sets are not intended for use with
2.06
3-type speakerphone systems.
The 636CA and 637DA telephone sets are
2.07
factory-equipped with a KS-20419L1 (10 volt
AC only) buzzer.
When station busy lamp feature is required
2.08
with these sets having 1A1 or 1A2 KTS line
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
equipment must be ordered separately.
than one busy lamp is required, a 6C KTU must
be connected as shown in Fig. 5.
busy lamp, •install a D-180463 Kit of Parts (ordered
separately), consisting of a P-90D033 Printed Wiring
Board Assembly and 840361836 plug assembly (light
beige).. Connect kit of parts as shown in Fig. 3.
1975
SECTION 502-610-418
Issue 4, March 1975
This requires a second tip
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