AASTRA 4222 Office for BusinessPhone User Guide EN - Manual (Page 98)

Accessories
BusinessPhone – Dialog 4222 Office / Dialog 3211 & 3212 98
Accessories
This chapter describes optional features that can be used together
with your BusinessPhone telephone.
Expansion key panel
Note: Only available for Dialog 4222 Office.
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 one
key panel.
Note: One key panel of type DBY 419 01 can be
connected to the Dialog 4222.
Option unit
Dialog 4222 Office
The Option unit DBY 420 01/1 is an optional accessory, to be
installed on the bottom of your telephone set. The following devices
can be installed via the Option unit:
•
Extra bell or busy indication outside your door
To check or set the option unit for extra bell or for busy signal: í*1
Press and hold simultaneously until a ring signal is heard.
The display shows: