<p>Hello asteriskers, I hope someone could help me ... !!</p>
<p>I bought a TC400B, and I am testing doing calls with G729 and G723.</p>
<p>When I used G729 it works fine, but when I try to use G723 the RTP has very low quality and is not possible to hear to the other person in the phone.</p>
<p>I try to find out the problem but the only weird that I saw in the debug info is this line (using asterisk 1.2.17):</p>
<p>asterisk*CLI> Apr 15 19:42:44 WARNING[17321] chan_zap.c: Frame too large<br>Apr 15 19:42:48 WARNING[17321]: chan_zap.c:4931 zt_write: Frame too large</p>
<p>This is my scenario:</p>
<p>- 1 Intel(R) Core(TM)2 CPU (Core 2 Duo with 2.13GHz)<br>- 1 Gigabit Memory<br>- kernel 2.6.18-1.2798.fc6 x86_64<br>- OS: Fedora Core 6</p>
<p>I tried first with asterisk 1.4.1 and its dependencies but the problem is there, too much noise when someone speeaks (poor voice quality).</p>
<p>In asterisk 1.2.17 and its dependencies (libpri, zaptel and addons) is a little better but the voice quality is not good anyway. In this scenario appears the Warning : Frame too large.</p>
<p>The show transcoders and show translations looks fine in asterisk CLI:<br>asterisk*CLI> show transcoder<br>0/0 encoders/decoders of 92 channels (G.729a / G.723.1 5.3 kbps) are in use.</p>
<p>asterisk*CLI> show translation<br> Translation times between formats (in milliseconds)<br> Source Format (Rows) Destination Format(Columns)</p>
<p> g723 gsm ulaw alaw g726 adpcm slin lpc10 g729 speex ilbc<br> g723 - 4 1 1 3 3 2 5 2 - 14<br> gsm 3 - 2 2 2 2 1 4 3 - 13
<br> ulaw 1 3 - 1 2 2 1 4 1 - 13<br> alaw 1 3 1 - 2 2 1 4 1 - 13<br> g726 3 3 2 2 - 2 1 4 3 - 13
<br> adpcm 3 3 2 2 2 - 1 4 3 - 13<br> slin 2 2 1 1 1 1 - 3 2 - 12<br> lpc10 4 4 3 3 3 3 2 - 4 - 14
<br> g729 2 4 1 1 3 3 2 5 - - 14<br> speex - - - - - - - - - - -<br> ilbc 4 4 3 3 3 3 2 5 4 - -
<br>asterisk*CLI></p>
<p>After of this I upgrade the kernel to 2.6.20-1.2944.fc6 x86_64, and the problem remains.</p>
<p>Any help will be so much appreciated.</p>
<p>-- <br>Jovanny Saravia<br>Solutions Manager<br>e-solutions Ltda<br><a href="mailto:jovanny.saravia@gmail.com">jovanny.saravia@gmail.com</a><br>+57-310-7676163 </p>