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. Using an Internet browser on a computer connected to the same network as the Aastra phone, browse to the phone's current IP address. (Note: Enter http:// or https:// before the IP address.)
  2. Log in to the web GUI using the username Admin and the device's MAC password.
  3. Go Advanced Settings > Network.
  4. At the top of the page, uncheck the box for Enable DHCP.
  5. Fill in the the information for all of the following:
    • IP Address
    • Subnet Mask
    • Gateway
    • Primary DNS: 8.8.8.8
    • Secondary DNS: 8.8.4.4
  6. Scroll to the bottom of the page and click Save Settings.
  7. Restart the phone.