[Asterisk-Users] Bizarre Echo Problem

[Kris Boutilier]

> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com]On Behalf Of Mark Edwards
> Sent: Monday, October 17, 2005 4:50 PM
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: Re: [Asterisk-Users] Bizarre Echo Problem
> 
> Hey Kris,
> 
> to add some fuel to the fire, I was monitoring one of the agents last night. He made a call to a target and then had to call them straight back to > confirm some information.
> 
> The first call was as echoey as the inside of a cathedral.
> The second (next) call was as clear as a bell.
> 
> Same number, next call. 
{clip}

That's quite interesting as one would assume it's the same call path regardless of the originator. It's possible that there was some variation somewhere (eg. one bad echo canceller module in a tandem trunk pool out in the PSTN), but perhaps not. I have heard others comment about intermittent bad echo, depending on who's originating the call. It would be interesting to try to hang up and restart the call outwards from Asterisk and see if the echo persists. Regardless as I said, it's really an echo issue for your ITSP to debug as they're interfacing to the PSTN and Asterisk doesn't do any echo cancellation on SIP/IAX translated calls.

:-)

Kris Boutilier
Information Services Coordinator
Sunshine Coast Regional District