Symptom:

After completing activation on your Polycom VVX phone, the screen shows Line Unregistered error and “Sign in” in the menu options.

Applies to:

Polycom VVX series phone devices

Resolution:

Change the Base Profile on the Deskphone 

To manually change the Base Profile to Generic on the deskphone 

1. Exit the initial sign in prompt.
2. Go to Settings > Advanced. 
   Password provided to you separately by your TELAIR Admin.
3. Select Administration Settings. 
4. Go to Network Configuration > Base Profile. 
5. Press Edit to change the Base Profile to Generic.
6. Press back, and then select Save Config. Your phone should reboot automatically.

Additional information: 

If the above steps do not resolve your issue, please raise a case with TELAIR support.