Note: We highly recommend consulting an IT or network professional when configuring advanced network settings. If able, the network administrator should always check the IP address, and assign and log any static IP to avoid conflicts in the future.

Switching a phone from DHCP to a static IP can be a useful way to address connectivity issues like URL call is disabled errors. It may also alleviate some (but not all) call quality issues.

Before You Begin

  1. Find out your phone's password. Aastra phones in an unprovisioned, factory default state and not running UC4.0+ firmware should be able to utilize 54321 or 22222. Otherwise, use the MAC password.
  2. Next, determine the phone's current IP address and a static IP address (along with subnet and gateway) to assign to the phone.

To set a static IP on an Aastra 6755i or 6757i phone

  1. Press the Options key.
  2. Press 5 for Administrator Menu.
  3. Enter phone's Password.
  4. Press 2 for Network Settings.
  5. Press 1 for DHCP.
  6. Select DHCP.
  7. For Use DHCP? change to NO.
  8. Press Done.
  9. Press Done again.
  10. Press for IP Address.
  11. Enter available IP Address.
  12. Press Done.
  13. Select Subnet Mask.
  14. Enter Subnet Mask.
  15. Press Done.
  16. Select Gateway.
  17. Enter Default Gateway Address.
  18. Press Done.
  19. Select DNS.
  20. Enter Primary DNS: 8.8.4.4.
  21. Enter Secondary DNS: 8.8.8.8 .
  22. Press Done repeatedly to return to the start screen.
  23. If asked, Cancel Restart.
  24. Unplug the power for 15 seconds.
  25. Reconnect, and the phone should boot up with the static IP now set.