6-18
DISTRIBUTED COMMUNICATIONS SYSTEM (DCS)
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If the called party is at a System 85, Generic 2, or
activated if the called node is returning busy tone or special audible ringback.
If the called party is at a System 75 or Generic 1 endpoint, the callback call can be activated if the
endpoint is returning busy tone, special audible ringback, or audible ringing.
The calling party must disconnect within 6 seconds after hearing the confirmation tone for automatic
callback activation.
The callback to the calling and called parties is as follows when a callback call has been made to a user at
another node/endpoint:
When the calling party answers the callback call, and no tie trunk to the called party's node/endpoint is
available, automatic callback is reactivated toward the called party. The calling party hears
confirmation tone instead of ringback when this occurs.
If the calling party is on a System 85, Generic 2, or
callback call (for example, a busy single-line voice terminal without call waiting), automatic callback is
reactivated by the calling party's node. If the calling party is on a System 75 or Generic 1 endpoint and
is unable to receive the callback call, the callback call is canceled.
If the calling party is on a System 85, Generic 2, or
canceled if the calling party calls the called party, or vice versa. If the calling party is on a System 75 or
Generic 1 endpoint, the callback is not canceled when one party calls the other.
Call Coverage Tone
This feature automatically redirects calls to a coverage point when the principal (called extension) is busy
(all call appearances busy), active on a call (one call appearance busy), or does not answer. A coverage
path can have up to three coverage points all of which must be on the same switch (the call cannot redirect
to a distant node). The switch checks each coverage point in the specified order until one is available.
Although the call cannot redirect to a distant node, coverage tone is transparent across switches except from
or to a
PBX.
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Call Forwarding
This feature allows a voice terminal user to forward all calls to other DCS nodes as long as the telephone
number has only 4 or 5 digits for
digits for System 75 and Generic 1 communications systems.
Call Waiting
This feature signals a terminal user, who is active on a call, that another caller is trying to call. In System
75 and Generic 1 communications systems, call waiting transparency is provided through the priority
calling feature.
Leave Word Calling (LWC) Without AP
This feature is a switch-based feature does not require an Applications Processor (AP). It is available on the
System 85 (R2V2-V4), System 75 (R1V2-V3), Generic 1, and Generic 2 communications systems. The
DIMENSION
DIMENSION
DIMENSION
, System 85, and Generic 2 communications systems, or 16
DIMENSION
PBX node, the callback call can only be
PBX node and is unable to receive the
PBX node, the callback call will be