i need to register bt synergy handset to the base?

Registering an additional handset
At the base:
1. Press and hold for 3 seconds until the base Power / In use starts flashing.
You have up to 60 seconds to register the handset.
At the handset:
1. If the handset is new and the display shows Please Register. Press Menu.
The display shows Registration. Press Select.
Or
If the handset has already been registered to another base the standby
display is shown. Press Menu, scroll or to Registration
and press Select.
2. Register Handset is highlighted. Press Select.
3. Bases are displayed. If necessary, scroll or to a new base you wish
to register your BT Synergy 5100 handset to and press Select.
4. Enter the system PIN and press OK .
5. The display shows Searching Base X (where X is the chosen base number)
then Handset Registered.
The handset is automatically assigned the next available handset number.

Brian
January 2011