[asterisk-users] lots of warnings from translate.c

Francesco Castellano francesco.castellano at gmail.com
Tue Apr 22 09:37:13 CDT 2008


I tried calls with a couple of other IP phones, but not extensively,
and these warnings did not happen. Anyway, also with the Siemens IP
phone, the warnings happen only sometimes.

At the moment, I'm not succeeded in correlating the warnings to a
specific user-agent.

Thanks,
Francesco

On Tue, Apr 22, 2008 at 12:50 PM, David Boyd <dboyd at ignitetrx.com> wrote:
>
> On Tue, 2008-04-22 at 12:28 +0200, Francesco Castellano wrote:
>  > We have a couple of servers with asterisk 1.4.19 and zaptel 1.4.10,
>  > acting as gateways from SIP to ISDN PRI interfaces. Each has one
>  > Digium TE420 (with hardware echo cancellation) and one TC400B for
>  > transcoding, in order to handle 60/90 contemporary calls in peak
>  > hours.
>  >
>  > In my logs there are hundreds of thousand warnigs per day like these:
>  >
>  > transcode.c: no samples for lintoulaw
>  > transcode.c: zapg729toalaw did not update samples ###
>  >
>  > Could you suggest me what are the possible causes for that? Are they
>  > signs of bad audio quality? Any ideas for resolving these issues?
>  >
>  > In addition I can say that we are using a quite large jitter buffer in
>  > zapata.conf:
>  >
>  > jitterbuffers=16 (=> 0.32s)
>  >
>  > Moreover, it uses the fixed implementation, because when I tried the
>  > adaptive one I experienced one-way audio.
>  > Finally I have to note that, using a Siemens IP phone (G.729 no
>  > AnnexB) in conditions of no load on servers, I could replicate
>  > non-deterministically (sigh!) each of these problems, with a very
>  > noisy audio, and a annoying period of silence during the first seconds
>  > of call.
>  >
>  > Regards,
>  > Francesco
>  >
>  > PS. Previous versions of asterisk and zaptel presented an identical situation.
>  >
>  Have you tried additional types of phones and if so can you produce the
>  same non-deterministic problems?
>
>
>  Dave
>
>
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