Ericsson 250 User Manual download pdf (Page 47)

OPTIONAL EQUIPMENT

BusinessPhone 250 - Basic Telephone

BusinessPhone 50 - Basic Telephone

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.

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Ericsson 250 User Manual Page 47