To register a handset with your W80/W90 base station it need to be set to registration mode via the web user interface.
To enable the W80/W90 base station registration mode:
- Access the web user interface as explained here.
- Go to the Handset & Account tab and select Handset Registration.
- Click Add Handset.
- Click Start Register Handset to enable registration mode.
Before you begin registering, long press the device key (
on the W80 or 
on the W90) untill the DECT LED indicator flashes.