What You'll Need To Do Programming; Using Buttons - Nortel Compact ICS 7.1 Coordinator Manual

What you'll need to do programming

Programming is performed using a telephone that can show two
lines of information on the display. Examples of telephones with
two-line displays are shown on page 17.
You need a programming overlay to show which buttons to press
when you are doing programming. See ''The programming
overlay'' on page 20.
When you use a telephone for programming, it is taken out of
service. This means it is unable to receive or make calls, and the
call forward features do not work. Do not use the main reception
telephone for programming because you may lose incoming
calls.

Using Buttons

The two-line telephone you use for everyday calling is used for
changes and maintenance. Examples of telephones with two-line
displays are shown in the illustration below.
Digital phones used for programming and maintenance
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Compact ICS 7.1 System Coordinator Guide