AASTRA 4220 Lite for BusinessPhone User Guide EN - Manual (Page 80)

Accessories
BusinessPhone – Dialog 4220 Lite / Dialog 3210 80
Accessories
This chapter describes optional features that can be used together
with your BusinessPhone telephone.
Alarm interface unit
Note: Only available for the Dialog 3210.
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.
Option unit
Dialog 4220 Lite
The Option unit DBY 420 02 is an optional accessory, to be
installed on the bottom of your telephone set. The following devices
can be installed via the Option unit:
•
Tape recorder
• Extra bell or busy indication outside your door
• USB connector