Point to Point Calls Dropping

[AAAPhoneBrad]

We have 2 IPO's connected to each other using 3 voice channels of a point to point T-1. We are able to dial across the T-1 and ring extensions on the remote side and hold conversations. The problem we are having is that about 2-3 min into the conversation the call seems to drop off. The call still shows active in system status (on both sides) but the callers can no longer hear each other. This is not VOIP just point to point T-1 ad it works on the Magix we are replacing, meaning the calls do not drop when made from the Magix so the circuit is good.

Any help is greatly appreciated.
THANKS!