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General System features / 193
P0881591 Issue 01
Modular ICS 4.0 System Coordinator Guide
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.
Calls on lines that ring but do not appear at a telephone are 
presented at an intercom button.
You may be able to answer a call on a line that does not appear 
or ring at your telephone. To pick up such a call, use Call 
Pickup, Call Park, or Trunk Answer. 
A telephone may have buttons assigned for lines 001 to 003, 
but have only lines 001 and 002 programmed to ring as well. 
An incoming call on any of the three lines causes a line button 
indicator to flash, and the telephone can be used to answer the 
call. This is especially useful for people who monitor other 
telephone lines, but want only their own lines to ring.
Target line
A target line is used to route a call directly to a particular 
telephone or group of telephones. Target lines are used only 
for incoming calls. A single incoming line may provide 
connections to several different target lines. This allows each 
person or department in the office to have their own number 
without having a separate external line for each number. 
Tip - 
The maximum number of target lines available in the 
fully expanded XC system is 192, and 128 on a DR 3.0 
system.
p0881591.book  Page 193  Wednesday, August 19, 1998  6:43 PM