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OPTIONAL EQUIPMENT
57
BusinessPhone 250 / BusinessPhone 50
Standard Telephone / Economyplus Telephone
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 telepho-
ne. It makes it possible to transfer alarm signals from various
devices via the telephone to the exchange and to a pre-defi-
ned 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.