keywords: ip pbx voip gateway gsm gateway

Very low quality when receive incoming pstn calls

7 years 5 months ago #10226 by aurquidez
Hello,

Any advice or tip in how to get the best voice quality when receive a incoming call from a pstn line?

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Armando
7 years 5 months ago #10229 by hua
Hi,

First please try to answer the incoming call from FXS port, Make sure the line is ok, If so then check your network or change the codec. If the voice is low , I think you can change it in the web with this value "rxgain".

Best regards
upper
7 years 5 months ago #10232 by aurquidez
Hello hua,

I didn't meant low volume, what I tried to say is that the quality of the incoming voice is poor.
Using Asterisk CLI command "sip show channels", always use the ulow (g711) codec for incoming calls. Is there a way to force transcoding to g729 or to g722?

Thanks for your quick response btw

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Armando
7 years 5 months ago #10234 by hua
HI

Let us talk by skype .This is my ID upper.hua .

Best regards
upper
7 years 5 months ago #10235 by aurquidez
Hello hua,

I'd really like you to solve this thread using this forum instead using skype, this way all other members will know how to solve when the same issue occurs.

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Armando
7 years 5 months ago #10237 by hua
Hi,

Sure, But it is inefficiency. By the way waht do you mean about the voice quality .Noise/echo or low voice or something else?
If has echo , Please enable the echocancel value;
If has noise, Please try to answer the call with Analog phone which connects FXS port, Not use IP phone;
If low voice,please adjust the rxgain/txgain value;
Please describle your problem .
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