Nortel Modular ICS 6.0, Manual

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General System features / 239
P0992640 03 Modular ICS 6.0 System Coordinator Guide
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.
M7100 and T7100 sets
Because these sets do not have line buttons, they work
differently from other Norstar telephones.
• Where other telephones can require that you select a line
button to answer a call, on the these sets you simply pick
up the receiver.
• Where other telephones require you to select a line button
to take a call off hold, you press
³ on the these sets.
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.