Norstar 7316, Системное руководство

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Line pools / 241
N0000626 03 Modular ICS 7.0 System Coordinator Guide
Line pools
A line pool allows each telephone access to external lines from
a group (or pool) of external lines. You can access such lines
by pressing an intercom button and entering a line pool access
code or a destination code, or by pressing a memory button
programmed with the line pool feature code and a line pool
access code.
Overflow call routing
If a call comes in for a target line that is busy, Norstar routes
the call to the prime telephone for that target line. If there is no
prime telephone assigned to the target line, or if a call cannot
be directed to a target line, the call goes to the prime telephone
for the external line used.
Overflow routing for incoming calls is used with the Routing
Service programmed by your installer. A Service must be
active for overflow routing to be in effect. Overflow routing is
not available in Normal service.
Tips -
When you make a call and the programmed route is
busy, you hear the expensive route warning tone and see a
display indicating that an expensive route is being used. To
avoid using the normal, expensive route, release your call.
Because overflow routing directs calls using different line
pools, a call may be affected by different line filters when it is
handled by overflow routing.
If you are not sure how the filters are assigned, refer to the
Programming Record for a description of line filters and for
a list of line assignments.