Optional Equipment - Ericsson businessphone 250 User Manual

Optional Equipment

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Optional Equipment
This chapter describes optional features that can be used
together with your BusinessPhone telephone.
Expansion key panel
Each key panel offers 17 additional keys for storing of your most
frequently used telephone numbers and functions, and for
supervising extensions. Your telephone can be expanded with up
to four key panels.
Note: If one or two key panels are used, the optional key
panel DBY 409 01 may be used. However, if three or four
key panels are used, all optional key panels must be of
type DBY 409 02.
Conference unit
For conferences with many participants, the conference unit
enhances the speech quality. It provides full duplex and high
quality conversation possibilities.
Alarm interface unit
This plug-in module is fitted into the bottom of the telephone.
It makes it possible to transfer alarm signals from various devices
via the telephone to the exchange and to a pre-defined extension.
A special circuit layout provides maximum functional security.
To a telephone fitted with an alarm interface unit you can connect
devices such as bathroom alarms for hotel rooms, emergency
alarms for hospitals, bank security alarms and supervision of
machines.
BusinessPhone - Operator´s Console