Is there any reason why you want to connect a second Asterisk server to one of the PRI’s? It would be better to use an IAX2 trunk for forward the calls across.
the 2nd asterisk box also has a bunch of analog lines, this is an addition. We fear for quality loss, echo, etc if we would convert to AIX2, and combine AIX2 trunks and analog trunks. We will test this in time though.
we will still need to route the incomming faxes to another span.