User`s guide

OPTIONAL EQUIPMENT
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BusinessPhone 250 - Operator´s Console
BusinessPhone 50 - Operator´s Console
Handset to headset
Headset Press the headset key (pre-programmed)
Headset with
group listening
Press to toggle between headset with or without
group listening
Headset to handsfree
Press
Headset Press the headset key (pre-programmed)
Handsfree to headset
Headset Press the headset key (pre-programmed)
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.