Jovanny Saravia wrote:
Hello asteriskers, I hope someone could help me ... !!
I bought a TC400B, and I am testing doing calls with G729 and G723.
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.
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):
asterisk*CLI> Apr 15 19:42:44 WARNING[17321] chan_zap.c: Frame too large
Apr 15 19:42:48 WARNING[17321]: chan_zap.c:4931 zt_write: Frame too large
Looks like you are going to have to modify the frame size for G723 on
the phones. Not sure what frame size asterisk is expecting but I would
guess 20ms or 30ms.
This is my scenario:
- 1 Intel(R) Core(TM)2 CPU (Core 2 Duo with 2.13GHz)
- 1 Gigabit Memory
- kernel 2.6.18-1.2798.fc6 x86_64
- OS: Fedora Core 6
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).
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.
The show transcoders and show translations looks fine in asterisk CLI:
asterisk*CLI> show transcoder
0/0 encoders/decoders of 92 channels (G.729a / G.723.1 5.3 kbps) are
in use.
asterisk*CLI> show translation
Translation times between formats (in milliseconds)
Source Format (Rows) Destination Format(Columns)
g723 gsm ulaw alaw g726 adpcm slin lpc10 g729 speex ilbc
g723 - 4 1 1 3 3 2 5 2 - 14
gsm 3 - 2 2 2 2 1 4 3 - 13
ulaw 1 3 - 1 2 2 1 4 1 - 13
alaw 1 3 1 - 2 2 1 4 1 - 13
g726 3 3 2 2 - 2 1 4 3 - 13
adpcm 3 3 2 2 2 - 1 4 3 - 13
slin 2 2 1 1 1 1 - 3 2 - 12
lpc10 4 4 3 3 3 3 2 - 4 - 14
g729 2 4 1 1 3 3 2 5 - - 14
speex - - - - - - - - - - -
ilbc 4 4 3 3 3 3 2 5 4 - -
asterisk*CLI>
After of this I upgrade the kernel to 2.6.20-1.2944.fc6 x86_64, and
the problem remains.
Any help will be so much appreciated.
--
Jovanny Saravia
Solutions Manager
e-solutions Ltda
[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
+57-310-7676163
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--
Andres
Technical Support
http://www.telesip.net
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