[asterisk-users] PRI Dropouts (Solved)

[Leo Ann Boon]

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