Ericsson BusinessPhone 250, User Manual, Page: 81 / 120

81 BusinessPhone – Operator’s Console
Optional Equipment
Optional Equipment
This chapter describes optional features that can be used
together with your BusinessPhone telephone.
Expansion key panel
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 up to four key panels.
Note: If one or two key panels are used, the optional key
panel DBY 409 01 may be used. However, if three or four
key panels are used, all optional key panels must be of type
DBY 409 02.
Conference unit
For conferences with many participants, the conference unit
enhances the speech quality. It provides full duplex and high
quality conversation possibilities.