Re: [Asterisk-Users] SPA-2000, call for help testing echo issues...

[Trevor Peirce]

Mike Benoit wrote:
I'm curious to know if anyone else using SPA-2000's have the same
issues. I wonder if when calls are made from SPA-2000's to PSTN numbers
through Asterisk, asterisk is just amplifying the SPA-2000's own echo
somehow.
 

I've noticed that my SPA-2000 has very bad echoing at the start of calls 
going over the X100P to/from the PSTN.  However, within 60 seconds, the 
echo will eventually completely eliminate itself.  The echo is only 
heard from the SPA end, the remote caller does not hear any echo.

Currently I only have two X100Ps and the SPA-2000, so there isn't much 
to test with, but those are my out-of-the-box results.  I have yet to 
tweak any settings to see if I can eliminate the echo problem altogether.

I do have both asterisk's echo cancellation and the SPA's echo 
cancellation enabled.

Best regards,
Trevor Peirce
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Re: [Asterisk-Users] SPA-2000, call for help testing echo issues...

[Andrew Yager]

On 04/07/2004, at 6:32 PM, Trevor Peirce wrote:
Mike Benoit wrote:
I'm curious to know if anyone else using SPA-2000's have the same
issues. I wonder if when calls are made from SPA-2000's to PSTN  
numbers
through Asterisk, asterisk is just amplifying the SPA-2000's own echo
somehow.

I've noticed that my SPA-2000 has very bad echoing at the start of  
calls going over the X100P to/from the PSTN.  However, within 60  
seconds, the echo will eventually completely eliminate itself.  The  
echo is only heard from the SPA end, the remote caller does not hear  
any echo.
I don't have an SPA-2000, nor am I any expert on these things, but it  
sounds like you are facing the traditional Asterisk + hybrid PSTN line  
echo issues. Chances are that any SIP device plugged into the local  
side of your asterisk box will start with a nice echo - which  
eliminates itself as echo training occurs.

Have a look at the wiki (  
http://www.voip-info.org/tiki-index.php? 
page=Asterisk%20echo%20avoidance ) and at the list for the last few  
weeks and read some of the settings you can try to eliminate the echo.

Not sure if it helps... but good luck!
Andrew
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