I have a customer that has purchased a Dialogic Brooktrout Fax Server and would to integrate it back to their NEC SV8500 via a PRI. Dialogic asked us to set up a simulated PRI for NI2, B8ZS, 4 B channels, 1 D channel, and Network side. I programmed up the PRI and connected it back to the fax server. The D channel is up, but they can't make calls. Has anybody tried configuring a simulated PRI on the SV8500 or 2400 that ties back to a fax server? Any help is greatly appreciated. I've been loosing hair and going gray over this. Thanks guys.