You can register your Polycom telephone on the provisioning platform here.
Your phone-secret: 629e7557f9
Write down the information above, you will need it later!
Copy the text below, this is the address of the provisioning server for your phone.
Use a webbrowser and browse to the IP address of your phone.
Login to your phone (default admin password is 456)
and go to "Settings" > "Provisioning server".
Change "Server Type" to HTTP or HTTPS.
Enter the URL in the field "Server Address".
Save the settings.
After this, return to the list and refresh the page a few times until you see your phone.