sundance-communications.com/forum Forums TDM Business Telephone Systems Inter-Tel Telephones & Systems Conference Calls Dropping

On an InterTel Axxess 5.346 system with a PRI, we're experiencing dropped calls whenever someone initiates a confernece call. Specifically, a user at our office initiates a conference call through the PBX (not through a service) and will have up to three callers on the line (4, including himself). The call proceeds fine but eventually calls start dropping all over the office, including the person on the conference call. It's pretty strange. Our provider claims its not their router (an Adtran) and when I check the logs on the PBX I don't see anything that indicates dropped calls. I'm stumped. Can anyone shed some light on this?

Try extending the Unsupervised CO timer, under System / Timers and Limits. By default, it's 5 minutes. I'm not sure if this is the problem, because technically, this isn't an unsupervised call.

It was already set to 120 minutes. I extended it to 200 minutes. Since it was set pretty high, I don't think that setting accounts for the issues... but thanks anyway for the suggestion.

"eventually calls start dropping all over the office"
This tells me it may have nothing to do with the conferance call. I think you were on the right track with the provider, when you looked at the logs did you look at the T-1 statistics you may see something there. You also might look at the resources available. It seems in 5.3 you had limitations to the amount of resources you could use at one time. I'm sure someone with a better memory will give us some numbers here
Randy

It is now looking more and more like an issue with our provider. They have us on what they refer to as a "converged VoIP" platform... where they use an Adtran Total Access 908 device as an interface between our PBX and their Broadsoft-based VoIP system. It was working fine for the first three months and now all of a sudden it's totally unreliable. Our service goes down almost every day. It's getting ridiculous. Our provider blames Level 3 and Level 3 blames Qwest... they've replaced a T3 line in the area, they replaced our NIU, and we put our T1 on a totally different 66-block now several times. The damn connection is still intermittent. I guess the only thing left to do is get out of our contract and go with an alternate provider.

If this is Qwest Intigrated Access or similar using the Adtran router I would demand they replace the router. Had exactly what you are discribing and after several battles we got the router replaced (about 3 months ago) have not been back
Randy