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Making calls – the basic
functions
You can use your handset to make both internal and ex-
ternal calls.
Internal calls are calls that
•
you make within the range of a communication sys-
tem, forexample, within your company,
•
you make between networked communication sys-
tems, for example, to different company locations.
External calls are calls that you conduct with users of
the public telephone network.
Making calls – the basic functions
37
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