What does this error mean?
A duplicate IP address error occurs when the DHCP server assigns an IP address to the phone that is already assigned to another device.
How do I fix the error?
1. Power cycle the phone.
-Unplug the phone from its power source.
-Wait a full minute or longer.
-Plug it back in.
-Give the phone several minutes to start back up and reacquire its configuration
2. Get an unused IP address from your IT administrator and assign a static IP address to your phone.
-Disable DHCP:
--Go to Menu > Settings > Advanced.
--Enter the phone password.
--Go to Admin Settings > Network Config > Ethernet Menu (DHCP Client on some phone models).
-Set static IP:
--Go to Menu > Settings > Advanced.
--Enter the phone password.
--Go to Admin Settings > Network Config.
--Set the following:
>IP address
>Subnet Mask
>Gateway
>DNS 1: Use your Internet Service Provider (ISP's) DNS
>DNS 2: Use your Internet Service Provider (ISP's) DNS or 208.67.222.222
-Back out of Menus to the Home Screen and then reboot your phone.
Contact your IT administrator and clear the ARP Cache or clear the DHCP Client Lease.
3. For further assistance, contact 8x8 Technical Support.