BusinessPhone – Dialog 4223 Professional / Dialog 3213
Accessories

## Expansion key panel

#### Dialog 4223 Professional

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:

For the Dialog 4223 Professional, you need the optional key panel DBY 419 01.

#### Dialog 3213 Executive

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.

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