[Freeswitch-users] Choopy one-way noise

[Moises Silva]

On Thu, Mar 1, 2012 at 9:45 AM, Christian Benke <benkokakao at gmail.com>wrote:

>
> Sangoma's Support appears to be clueless as well, they didn't have
> effective suggestions so far(Opened a ticket 2 weeks). Since i don't
> have this problem with identical hardware without
> Sangoma-Cards(SIP-Trunk instead), my first assumption was the card.
> Probably an interrupt issue?
>

Another test you can try to pinpoint the issue and determine once for all
if the problem is below FreeSWITCH is to use the "ftdm trace" command. This
command
will create an input an output file (in the directory you specify) that
contains the raw audio as it is read and written from/to the wanpipe device.

Type "ftdm trace" to see the command syntax. Run the command whenever you
reproduce the problem (can be run in the middle of the call) then stop the
trace with "ftdm notrace" when you're
done capturing. Note that the tracing will not stop automatically when the
call is hung up, the trace is a raw I/O trace and has no knowledge of calls
starting or being hung up.

The audio format will be alaw (because is a BRI line), you can convert that
to a wav (with sox for example) and see if the audio issue is there. If it
is, we can start thinking on lower-level troubleshooting.


*Moises Silva
**Manager, Software Engineering***

msilva at sangoma.com

Sangoma Technologies

100 Renfrew Drive, Suite 100, Markham, ON L3R 9R6 Canada


t.   +1 800 388 2475 (N. America)

t.   +1 905 474 1990 x128

f.   +1 905 474 9223



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