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

[David Boyd]

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