SECTION 5 1 8-450- 1 00
and 2575AM telephone sets, refer to Section
503-603-120.
The telephone which is to be used as
the attendant station (code 0), without
ring transfer, m ust be m odified.
Disconnect the V-BR lead from terminal
28 on the s e t terminal board;
insulate and store.
3 . 1 4
Where a wall-mounted telephone is desired,
install either a wall-type set (832/2832DM
or EM) or a D-180656 kit of parts for converting
desk sets to wall sets. The method of mounting
wall-type sets is illustrated in Fig. 27. The D-180656
kit of parts (Fig. 28) consists of a mounting shelf
and a telephone set retaining clamp. Install the
mounting shelf using appropriate fasteners for the
surface on which it is to be mounted. Insert the
telephone set mounting cord down through the
opening at the rear of the shelf. Insert the retaining
clamp (screw down) through the slot of the shelf,
up into the base of the telephone set. Check that
the pads on the telephone set base fit in the slots
in the shelf and tighten the retaining clamp until
the telephone set is held firmly in place.
3. 1 5
Consoles:
Up to three DSS o r M W consoles,
in any combination, can be used with a 7A
System.
Consoles are usually associated with
stations which are designated as attendant positions.
Some systems will have only one attendant position;
in such cases, either an MW or a DSS console or
both can be located at the attendant position. If
another station is designated as an alternate
attendant position, a second or third console might
be located there.
Note:
Terminations and power are provided
in the 7A System for either a DSS or MW
selector console. If a second or third console
are required, additional power and external
terminations must be supplied (Fig. 50 to 58).
4.
F E A l U R E S ( I D E N T I FI C A T I O N , OPERATION,
CONNECTIONS, AND TESTING)
BASIC FEATURES
A. Automatic Button Restoration (ABR)
4.01
Automatic button restoration is a feature of
the 832- and 2832-type telephone sets used
with the 7A System. When the handset is replaced,
Page 38
all depressed buttons return to the unoperated
position. This prevents inadvertent intrusion on
calls in progress and insures that multiple buttons
will not be left depressed on a set causing an
undesired conference from the idle set.
4.02
The intercom-only telephone sets, 575AM
and 2575AM, do not have ABR.
4.03
On 832- and 2832-type telephone sets equipped
with a RECALL button, this feature should
be used for flashing, instead of the switchhook.
Otherwise, the ABR will release the line button
when the switchhook is operated. On 832/2832A
sets without recall, hold down the line button while
flashing with the switchhook.
4.04
Automatic button restoration is a mechanical
function of the telephone set; no wiring is
required and field adjustment of the mechanism is
not recommended.
B. Common Audible
4.05
The 7A System is factory-wired for the
attendant station (intercom code 0) to receive
tone ringing
whenever there is an incoming call
on any of the CO/PBX lines. (The lamp under
the associated CO/PBX line button flashes for visual
identification of the calling line.) See Fig. 29 for
connections.
4.06
The attendant answers all incoming calls
and either takes a message or forwards the
call to the desired party using the intercom. To
forward a call, the attendant puts the incoming
call on hold (CO/PBX line lamp goes from steady
to wink), then picks up an idle intercom path, dials
the desired station, and voice signals that there is
a call on a particular CO/PBX line. By observing
the CO/PBX line lamp (going from wink to steady)
the attendant is able to determine when the call
is picked up. If after a suitable period of time
the call is not picked up, the attendant may again
pick up the line and proceed per local instructions.
4.07
Common audible is derived through diodes
located on connecting block 1. As factory-wired,
there is one diode per CO/PBX line connected to
a common audible terminal. A factory-provided
strap (on the installer's side of block 1) connects
the common audible terminal to station code 0.
