Well, the first thing that comes to mind is what protocol is Comcast providing? Don't assume. They really don't know what they are doing. You MUST get a Comcast network engineer involved. He can tell you what they are providing. You MUST confirm ESF, B8ZS and NI2. Yes, I know, everyone thinks PRI only works on what I just wrote, but I have seen Comcast provide AMI and the PRI will be wonkie like it is for you. Also, they may be providing AT&T rather than NI2.

Second, what are your ESI PRI reports telling you. Are you getting Blue alarms? If you are getting Red alarms, the circuit is not configured properly. Blue alarms will usually point to bad D channel.

Finally, you really need to get a PRI analyzer. Really. You are trying to go to battle with Goliath Comcast with nothing. You don't even have a sling shot. The fact that the system ran OK in your shop really doesn't tell you much. Without running patterns and stressing the span, you are just making a physical layer connection and not knowing the rest of the story.

If Comcast does their typical DUH response, at least, look up the Panasonic specifications regarding their requirements for the PRI and that might give you some clues.

On this one, I agree with ESI. Once you swap out all the ESI equipment and come up with the same problem, it is likely the problem is the provider.

Rcaman

Americom, Inc.
Where The Art And Science Of Communications Meet