Ericsson businessphone 250 User Manual page 102

Installation
102
Install keypanel
1 Connect cable
2 Attach key-panel unit
3 Secure with screws
4 Install stand
When connecting one or two optional key panels to your telephone
the DBY 409 01 key panel may be used. No external power cables
are required for this key panel, as power is supplied from your
telephone.
However, if three or four key panels are to be connected, then
the DBY 409 02 optional key panel must be used for all key
panels connected to your telephone. Whereby, a 24 V a.c. power
cable must be attached to the first key panel connected to your
telephone to provide power to all key panels.
24 V a.c. connection
when more than two
key panels are used.
Connection must be
to the first key panel
BusinessPhone - Operator´s Console