Hey Everyone. My company has been utilizing a TDA 200 PBX for over 3 years now. Recently, we pulled one of our T1's because we downsized and no longer needed the bandwidth. Since then we have been experiencing a nasty problem. I am working in collaboration with our Panasonic vendor (who is certified) and our voice/data service provider, but haven't had much luck. Now i'm turning to forums in desperation. Here's a breakdown of our problem.
We have a single PRI via a T1. It's fractionalized so channels 1-12 are data and 13-23 are voice. We used to have an additional PRI utilized solely for voice. When we pulled that additional T, our PBX crashed and my dealer had to reprogram it from scratch. When our call volume is at its highest, some of our channels will "freeze up" and don't seem to be released properly. So instead of having 11 available channels, we will only have 1 or 2 to receive inbound calls. This holds true even after everyone has hung up and no calls are active. The only thing that "unfreezes" them is cycling the ADTRAN unit where the T1 terminates in our switch room. We are all stumped as to what might be causing this. I'm fairly confident it's a programming error in our PBX, but my vendor doesn't seem to think so.
When running the ISDN protocol trace from maintenance console (v1.06h - i know it's an old version but it's all i have access to right now) i can see error "#44 Requested channel not available." Does anyone have any idea what could cause channels to freeze and not release properly? We only have a problem receiving calls when this happens, not making outbound.
I know all you certified deals charge good $ for this kind of stuff, and i don't expect a detailed reply. i'm looking for just a point in the right direction. I'm stuck in the middle between our vendor and our service provider, but i'm the one answering to our CEO
ANY help even the slightest would be VERY appreciated!
Sorry for the long post...just trying to be as detailed as possible