Known Issues

  1. SIP ALG cannot be disabled.
  2. The built-in software firewall intermittently interferes with phone registration, and it cannot be disabled.


  1. Replace this router with a recommended or serviceable router.
    • Intermedia cannot setup the new router for you, but your IT or the manufacturer of your new router can help you.  They will need to move settings from the old to the new router to ensure your computers and other devices on the network work properly.

Temporary Resolution

  1. The steps below are only needed if you have or plan to purchase Polycom phones. 
    • They provide a temporary solution for Polycom phones being unable to register. 
    • You will still need to replace your router.
    • The changes below will take your computers, phones, and other devices on your network offline for 10 minutes or much longer if unexpected problems arise.
    • Make sure to only make this change when you can afford to take your network offline.
      • Click Advanced > LAN  Change the following:
        • Primary DNS:
        • Secondary DNS:
        • Click Apply
    • Reboot the router, all computers, and all Polycom phones.
    • If any Windows computers cannot load webpages, you will need to run the following command from Command Prompt to clear the computers' DNS cache:
      • ipconfig /flushdns