I've had a lot of problems with Pitney Bowes in the past. Just to keep things simple I usually split the fax line and use it. I try not to connect analog devices through the phone switch unless I have to, there are too many variables that can cause problems and the first thing any manufacturer is going to do is point at the phone switch.
Another thing I always insist on is at least one analog line no matter how many PRI's the customer has.
