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140 / General System features
Norstar-PLUS Modular ICS 2.0 System Coordinator Guide P0857846 Issue 02
allows the system to release the line for other uses. Your installer or
customer service representative assigns disconnect supervision.
Incoming line groups
Lines can be assigned to an incoming line group to provide line
concentration for incoming calls. You can then assign the incoming
line group to appear at a telephone rather than each individual line.
This frees up memory buttons for programming features or autodial
numbers.
You can assign the same incoming line group to several telephones.
You answer calls on an incoming line group in the same way as you
answer calls on a line.
Internal numbers
Each telephone in the Norstar system has its own internal number.
The length of internal numbers in your system can be from two to
seven digits on a non-expanded system, and three to seven digits
on an expanded system. All numbers in your system are the same
length. Your installer or customer service representative sets the
length of internal numbers (also called the DN length). The default
DN length is three.
To find out your internal number, use the Button Inquiry feature
( ) on an intercom button. On the M7100 telephone,
Button Inquiry shows your internal number followed by the function
assigned to your single-memory button.
Line assignment
Any of the lines in your system can be assigned to any of your
telephones. Your installer or customer service representative
assigns lines to telephones in Configuration programming. Lines
can be assigned to appear only, appear and ring, or to ring only.
Usually, only the lines that are appropriate for a particular person
appear at that person’s telephone. When a line is assigned to a
telephone it is automatically given a line button on that telephone, if
a button is available. The M7100 telephone has no line buttons for
its lines.