Hi All,
Well I feel I should post the outcome of my endevors with this system. I was able to get all 24 TEL ports working finally by taking Rickman's suggestion of removing the ESI(8), setting it's slot to NON in MB 7-1 then reinstalling it in slot 5 and adding it back in to MB 7-1.

I did make one key mistake. Apparently one of the ports that I thought was not working by measuring it's output voltage was in fact OK. The wall jack I had installed for this phone was open. You can't test the port without a phone connected otherwise the T/R output just goes to +5v on tip and -24 on ring. Opps.

I am getting an MIFM board so I can back the system up. Also would like to upgrade to a higher capacity unit that would allow me to reuse the ETUs and phones...IPKII perhaps.

Thanks,
Ike