| hey guys thanks for the replies. im sorry for the delayed response. sorry for my confusion about the ISDN PRI vs T1...im still working on the terminology. we have 12 channels for data and 11 for voice. yes, there is an ADTRAN unit where the line terminates. im not sure of the specifics of the unit as im not on site right now but I can post that when I get back later. that unit is how we split the cicuit between voice and data as our router and pbx are connected to it.I have our vendor coming on site today as well as a tech from our provider to replace that unit. I've spent the last several days reviewing voice activity to look for a pattern, but the only thing that seems common is heavy inbound volume. reseting the adtran is the only thing that seems to release the frozen channels. the most difficult thing here is not being able to reproduce the problem in a controlled situation. we have spent many hours after hours blowing up the lines but have yet to trigger the problem. what is also odd to me is this does not limit our ability to make outbound calls. only inbound calls are affected.hopefully I will have some better info later today and will post as soon as I can. thanx again for all ur help and advice! |