Kevin Withnall wrote:
After much playing and getting nowhere, I was on the phone to the guys
from www.voipshop.com.au and mentioned that the pri dropout problem was
occuring and if they had any solutions.
Immediately they mentioned something that causes a problem in australia.
On longdistance phone calls (sometimes) you hear a series of short beeps
that indicates to the receiver that it's a long distance call. Few calls
seem to do this these days but some do. It seems to be exactly what the
busy detect code looks for.
On removing the busydetect (or rather setting it to 0) it solved our
dropout problems.
This is rather strange. AFAIK, busydetect is only applicable to analog
FXO ports. PRI doesn't depend on call progress tones, everything is in
the D-channel. Can anyone else confirm that busydetect is used for PRI
in chan_zap? If so, I would consider it a bug.
Cheers.
Leo
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