User guide

appearance can gain access at the same time
(sometimes known as common line pickup). A line is
specified as private or non-private through system or
administration programming. Also see the discussion
titled, Add-on Conference And Privacy Release.
AUTOMATIC REDIAL (OF BUSY
NUMBER OR UNANSWERED CALL)
Automatic redial of the last dialed number can be
made available at every station through button
programming. In most cases, the station user must
program a button for use as an auto redial button;
however, some telephone models provide an A16
button as part of the A-button field and this provides
an auto redial function as a fixed feature. With this
feature, a busy number or an unanswered call can be
redialed repeatedly. Once automatic redial is
activated, the station will select the line, automatically
dial the number, and wait for a response. It will do this
once a minute for approximately 10 minutes. The user
must lift the handset to take immediate control if the
call is completed. Users of the optional speakerphone
station can take control by pressing the SPKR button
instead of lifting the handset.
AUXILIARY EQUIPMENT INTERFACE
A non-key system telephone device or data device can
be connected ahead of the common equipment on
certain line ports across the tip and ring leads. Special
terminals in the line jack are provided for this purpose.
The system can detect an off-hook condition in the
connected device, and turn on the line status light at
the key system telephone stations with access to the
line to indicate the busy condition.
AUXILIARY STATION RINGER
INTERFACE
The auxiliary station ringer interface provides
“dry-contact” relay closures whenever station 17 rings.
The contact closures track the ringing pattern of
station 17, and can be used to control an external
signalling device. When a particular station port is
programmed to function as a PA port, the auxiliary
ringer interface relay contacts automatically become
supervisory contacts. They close when the PA port is
called. In this configuration, they are used to enable
an external PA system. Also refer to the discussion
titled, Common Audible Ringer Interface.
BACKGROUND MUSIC
If an external music source is provided, background
music can be turned on and off at individual stations.
Background music automatically turns off during calls.
Also refer to the discussion titled, External Music
Source.
BASIC KEY SERVICE (1A2)
The system provides all of the basic, 1A2-type, key
service features. These features are: selective line
pickup, common line pickup, multiline pickup, and
hold.
BATTERY BACK-UP
(CHASSIS, CABLE, AND BATTERIES)
Battery back-up assemblies including chassis, cable,
and battery are offered as optional kits (available from
Comdial). The assemblies are designed to connect
directly to the un-interruptable power source (UPS)
interface located on the common equipment chassis.
No user intervention is required with this feature, and
no class of service programming is required.
BATTERY BACK-UP INTERFACE
Provision has been made for attaching a Comdial
provided optional battery back-up kit to give full
uninterruptable system power in case of an AC power
loss. The switching and trickle charge circuitry are in
the common equipment, while batteries, chassis, and
cable are packaged as a separate option. When
plugged into an active AC power source the common
equipment will constantly charge the attached
batteries with a trickle current. Built-in circuitry
automatically switches to battery power when AC
power is lost. With batteries at full charge, a fully
loaded system will operate for a minimum of one hour
without AC power. No class of service programming is
required.
CALL ANNOUNCE WITH HANDSFREE
ANSWERBACK
The internal speaker at each multiline station provides
call-announce capability over the intercom link. A
handsfree response to a call-announce call can be
made. This response is transmitted by the microphone
built into the handset. Also refer to the discussion
titled, Voice Announce Blocking
CALL PICKUP - DIRECTED
A user at any station can dial a special prefix code,
followed by the number of a ringing station, to answer
a ringing call at that station.
CALL PICKUP - SYSTEM
A user at any station can dial a special code and
answer a ringing call at any station in the system. The
feature can be enabled or disabled by system or
administration programming.
IMI 66-064 System Description
2-2