Hi All, I hate to post yet another "bloody hangup detection issue" on the list, but I have been pulling my hair out no end of late with a hangup detection issue on 1 system (have a few others out there with TDM400's and no issue but this one is causing a real headache)
The scenario is - system with TDM04B, a call comes in on a analogue line, rings internally and then diverts to a mobile on a second analogue line, so we in effect have a trombone happening where a call comes in on 1 analogue and back out on another analogue. Hangup detection seems to be working most of the time, but on a regular basis does not (about once every 2 days or so). We cannot get hangup supervision / polarity reversal or any other smart way of detecting a hangup, so are using busydetect. What seems to be happening is that on trombone'd calls when both parties hangup, there is a busy tone being played on each leg of the call back down each line. Some times we seem to get lucky and the tones are played in sync and a hangup occurs, but other times the tones are out of sync with each other and are overlapping, causing a non-normal tone on the line(s) or a continuous tone rather than a 'beep beep beep' which means the card / system cannot detect a hangup via busy detect. Can anyone out there confirm if my assumptions are correct re the dual'ing or the tones and the effect it will have on hangup detection? And if correct, can anyone recommend a work around to get hangup detection working in such a scenario? Cheers, Ben
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