On the screen of the Allworx phone you should see a Config softkey.

1. Press the Config softkey
2. Use the arrows to the right of the screen and scroll down to Network settings, press the checkmark button
3. The default password is ALLWORX (once the phone has registered to the system you can find the new phone admin password by logging into the Allworx admin console in Servers > VoIP) then press the checkmark button
4. Select DHCP and press the checkmark so it shows Disabled
5. Arrow down to Edit phone IP, press the checkmark
6. Enter the available fixed IP for the phone, use * for . (ex 192.168.1.x), press the checkmark 
7. Arrow down and do the same for the Edit netmask (ex 255.255.255.0) and Edit gateway (ex 192.168.1.1)
8. Once all the information had been entered press Exit, Exit again, and press Yes to save into flash
9. Then press Reboot (or Config and arrow down to reboot phone)

configure, network settings, allworx, IP Phone