Bell System Practices 2636CA Service

BELL SYSTEM PRACTICES
&
AT TCo Standard
2636CA, 2636CAM, 2637DA, AND 2637DAM TELEPHONE SETS
1. GENERAL
1.01 This section contains connection and maintenance
information for 2636CA (MD), CAM (18-button)
and 2637DA (MD),
DIRECTOR® telephone sets equipped with headset
jacks.
This section is reissued to:
1.02
•
Add information on 2636CAM and 2637DAM
(modular) telephone sets
•
Show the 2636CA and 2637DA telephone
sets 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 Tables 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.
These sets are equipped with a 635A5C (5-line
2.02
pickup and hold) or a 635AD5C (4-line pickup,
cutoff, and hold) key in the first module position.
Contact strip assemblies [required with sets equipped
with a Dl20K (MD) or D200S (MD) mounting cord]
Scanned oy Fran< Harrell, (Cowboy Frank) Castle Rock, Colorailo Oct OS, 2012 16:38:41
DAM (30-button) CALL
They
should not
Not for use or disclosure outside the
Bell System except under written agreement
Printed in U.S.A.
SERVICE
differ between the two keys.
replacement, the 635AD5C key 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.
Because of the physical arrangement of the
2.03
635-type key, the contact strips do not extend
to the chaining switch.
and ring conductor to each module (except the
last). See Fig. 2, sheets 1 through 5.
The line conductors of the mounting cords
2.04
for these sets terminate in individual plugs
on a per line basis and are connected to the rear
of the keys. This permits rearrangement of line
appearances either in the set or at the key equipment
distribution point.
equipped with a satin-silver ( -87) mounting cord.
All line pickup key positions are convertible
2.05
to signaling or common signaling arrangements
by removing the •812857738• (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
speakerphone systems.
The 2636CA, CAM
2.07
telephone sets are factory equipped with a
KS-2041911 (10 volt AC only) buzzer.
be
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
NOTICE
SECTION 502-612-4 1 0
Issue 5, April 1976
If ordered for field
This requires a second tip
Current production sets are
and 2637DA,
If more
Page 1
DAM