If you take your CenturyLink® VoIP phone home (or to another location outside the office) and it boots up with your office extension showing on the screen, you’re ready to go. If not, follow these steps to configure your phone manually. You may also need to verify the VLAN setting, and configure your router.
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.
To configure your VoIP phone manually:
If you get a URL error on your phone after bootup, you also need to verify the VLAN setting.