If you get a URL error on your CenturyLink VoIP phone after bootup, you’ll need to verify the VLAN setting. It’s a good idea to do this any time you set up your phone at a new location, such as taking your phone from (or back to) your office.
To verify the VLAN setting of your VoIP phone:
Did you know? When you take your phone off the CenturyLink-provided network, CenturyLink service level agreements, quality of service (QoS), and the ability to connect to the hosted VoIP platform are not supported. Troubleshooting is limited to providing phone and router/firewall settings.