I'm attempting to use OMCI to identify my x64 bit client systems. I've noticed in the reference guide shows processor Family - is that the only way to identify whether your client system is 64 bit via OMCI? Perhaps there is another field that would show this information - does anyone have any suggestions?

Are you looking for OS, or Processor architecture? two different types of x64 . .

You can have a processor that supports, x64, but you have an x86 OS running

If you're looking for processor architecture, check win32_processor: http://msdn.microsoft.com/en-us/library/aa394373(VS.85).aspx

Good point to clarify. I'm looking for Processor architecture, not the OS.

than the easiest way is to use win32_processor - let me know if that doesn't work for you, and I'll ask around to see if/where it's located in OMCI.