> I have an asterisk box with one TDM2400, it has 8 FXS's and 12 FXO's,
> and it also has the echo canceller...
> I'm running Asterisk 1.2.13 and Zaptel 1.2.12 with the Kernel
> 2.6.9-34.0.2.EL
> I'm using Polycom's 501 with the SIP 1.6.2.0041
>
> The problem is when someone dials to or from the PSTN through the
> TDM2400, the voice quality is crappy...Instead of hearing:
>
> Hello, this is John
>
> You hear..
>
> He o, th s J hn
>
> I already tried with the fxotune utility, also using G711 or G729,
> dealing with the gains... but I can't see the light...
This is a bug in the 9.00-002 HPEC echo canceller.
I have no idea when a patch will be available.
I don't think this is the HPEC issue. I don't think Zaptel 1.2.12
supported HPEC. This must be the hardware echo can on the TDM2400.
Arturo, can you post your zapata.conf and sip.conf?
Also, I don't think this is your problem, but you may want to consider
upgrading to Asterisk 1.2.17 and Zaptel 1.2.16. There have been many
bug and security fixes since Asterisk 1.2.13.
- Noah
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