I’m looking at another web host application for the XT 2000 -the dev team has asked that I point the IP address of the unit to an address 12.50.49 - - - you get the idea   - how - can this be reprogrammed on a device I allready have here in my possession that is reporting to the FAST Server?

You can tell your dev team to refer to this article about changing the IP and port on the Xirgo device:

http://dev.numerex.com/getting-started/article/changing-the-ip-and-port-on-xirgo-xt2000/

thank you - does the individual unit need to be powered on as well?