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24 Chapter 1 Introduction
P0937240 02
Line assignment
You can assign any of the lines in your system to any of your telephones. Your installer assigns
lines to telephones. Assignments for lines are:
• appear only
• appear and ring
• ring only
Lines assigned to a telephone automatically have a line button on that telephone, when a button is
available. The T7100 telephone has no line buttons.
Prime line
You can program your telephone to select an internal, or external line, or a line pool automatically
when you lift the handset. This is your prime line.
Private line
A private line is limited to a selected telephone. You can pick up calls put on hold, or not answered
on a private line, only at the prime telephone.
Target line
A target line routes a call directly to a selected telephone, or group of telephones. Target lines are
only for incoming calls. A single incoming line can provide connections to several different target
lines. Target lines allow each person or department in the office to have their own number without
having a separate external line for each number.
Overflow call routing
If a call comes in to a target line that is busy, the system routes the call to the prime telephone for
that target line. If there is no prime telephone assigned to the target line, or if you cannot direct a
call to a target line, the call goes to the prime telephone for the external line.
Overflow routing for incoming calls uses the routing service programmed by your installer.
Service must be active for overflow routing to operate. Overflow routing is not available in normal
service.
Note: When you make a call and the programmed route is busy, you hear the
expensive route warning tone and see a display indicating the use of an expensive
route. To avoid using the normal, expensive route, release your call.
Because overflow routing directs calls using different line pools, a call might be
affected by different line filters.