After loading configuration and running diagnositics it says ethernet port error. The node ID currently is :ffffffffff ..

How do I correct the nodeID?

The node ID is not valid and must be fixed. There is a program you can download, to fix this. This file is zipped, which has the program and instructions compressed.

https://webfiles.multitech.com/MultiVoip/Misc/

The above URL, is where you can download the program, called setaddr.zip. Follow the instruction and this should fix the VOIP.