Specifications

Description Of System Features
IMl66-107
I Hold And I Use Indications
The light associated with a line button provides a
visual indication of the status of that line. When a
station user has a line in-use or on-hold at a station,
the light indication provided at that station is of a
different color than the indication provided at the other
stations in the system. No class of service
programming is required.
Idle Line Preference
Refer to the discussion titled Line Feature&
Industry-Standard Telephone Support
Refer to the discussion titled Analog Terminal
Interface Support.
Intercom Features
Automatic Callback
If a telephone user encounters a busy tone or a ring
no-answer after calling an intercom station, She or he
can dial a special code number that will cause the
system to automatically ring both the user’s telephone
and the one that he or she was calling. This automatic
callback occurs after the busy station becomes idle or
after the user at the ring no-answer station takes some
action at it that indicates to the system that it is
available to be answered. No class of service
programming is required to enable this feature.
Call Announce With Handsfree Answerback
The internal loudspeaker at each station provides
call-announce capability over the intercom link. A user
can make a handsfree response to a call-announce
call without lifting the handset.
The user can use the MUTE button to block all
handsfree answerback response. This arrangement
will prevent a station user from monitoring another
station site using the monitoring ability of the voice
announce feature. When a user presses the MUTE
button, all handsfree answerback is disabled thus
inhibiting any off-site monitoring. The MUTE light
turns on steady to indicate that this feature is active.
Dual Intercom
This feature provides for two separate intercom lines
at the same station. One intercom line is fixed and is
accessed with the Intercom button. The other
intercom line is programmable and is accessed by a
programmable button selected for that purpose by
class of service programming. Calls are handled on
the intercom lines in much the same manner as
outside calls are handled using the line buttons.
Special considerations are as follows:
l Distant party hang-up causes intercom link to drop.
Intercom call to station already busy on intercom
rings in subdued fashion and flashes indicator
associated with other intercom button.
With both intercom lines busy, a third intercom call
results in a subdued off-hook voice announce (if
enabled) at busy station.
Pressing a DSS button while on an active
intercom call will drop the distant party unless the
automatic hold feature is enabled for the intercom
line through class of service programming. The
hold button can be used, however, to place an
intercom call on hold before selecting the other
intercom line for use.
Any action taken on the intercom by a station
being observed via the service observing feature
will cause the observing station to return to an idle
state.
The station class of service button mapping procedure
assigns a programmable button to serve as the
second intercom button.
Intercom Call Progress Tones
Intercom call progress is marked by special tones. A
steady tone is provided for dial tone. Ring-back tone
is one second on and three seconds off. For tone
signalled intercom calls, a two-tone burst is sounded
every four seconds at a called station and returned to
the caller as ring-back. For a voice signalled intercom
call, a single tone burst is sounded at a called station.
When a called station is busy, a busy signal of
one-haff second on and one-half second off is
received at the calling station. A fast busy tone will be
supplied when the called station is in the do not disturb
mode. ATI-D ports are only supplied with the regular
busy tone since fast busy tones could interfere with
the operation of some accessories that can be
connected to this port.
Intercom Hunt Group
Station ports can be assigned to intercom hunt groups.
When a station that is assigned to a hunt group is
busy or is a ring-no-answer (RNA), a call to it will ring
at the next idle station in the group. A hunt group can
be terminal or circular. A call will route down a terminal
group from the called station until it finds an idle
station or reaches the end of the group. A call will
search around a circular group until it encounters an
idle station or until all stations in the circular group are
searched. The ringing time at any one station is
programmable. Hunt groups are created through
station class of service programming.
Intercom Line Timeout
Should the intercom line be selected with no dialing or
other action taking place, the intercom will timeout
after 65 seconds, and return to an idle state.
Intercom Features _ continued on next page. . .
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