Comdial G0408 Manual page 380

Digital Telephone System
• 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-signaled 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 signaled intercom call, a single tone burst is sounded at a
called station. When a called station is busy, a busy signal of one-half second on and
one-half second off is received at the calling station. The system supplies a fast busy tone
when the called station is in the do not disturb mode. Analog terminal interface 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.
For more information, see section 1.7.2, System Ringing Patterns.
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 anyone 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 15 seconds, and return to an idle state.
A – 40 Digital Telephone System Features
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