[Asterisk-Users] Asterisk Echo problems, Urgent, please help,

[Ian Bonham]

I'm using a Voicetronix OpenSwitch12 analouge card. It's on the latest 
driver for Asterisk (2.4.9) and has echo cancellation turned on. This works 
fairly well on on SIP->POTS calls after it trains up, but there is still a 
small echo. The SIP->SIP calls are really echoy though.

Cheers,

Ian
(Sorry, only hit 'reply' last time, not 'reply all'!)



>From: Tom Hayden <thayden at gmail.com>
>Reply-To: Tom Hayden <thayden at gmail.com>,Asterisk Users Mailing List - 
>Non-Commercial Discussion<asterisk-users at lists.digium.com>
>To: Asterisk Users Mailing List - Non-Commercial 
>Discussion<asterisk-users at lists.digium.com>
>Subject: Re: [Asterisk-Users] Asterisk Echo problems, Urgent, please help,
>Date: Thu, 29 Sep 2005 09:02:05 -0400
>
>What kind of POTS trunks/cards are you using?
>
>--
>Tom
>
>On 9/29/05, Ian Bonham <bon_the_one at hotmail.com> wrote:
> > Hi all,
> >
> > I hope someone can help, as I have an urgent problem.
> >
> > I've got a production Asterisk server thats been deployed, but we are 
>seeing
> > a strange voice echo problem. There is about a 250ms echo for the users 
>in
> > the office, and they are hearing their own voice back at them.
> >
> > I'm running the CVS Head code, on RH9.0. This is on a P4 box with 2gb of
> > memory. The client SIP phones are Polycom Soundpoint IP600's, WiFi ZyXel
> > 2000w handsets, and X-Lite (free) PC clients. All see the same problem.
> > There is a bridge into the POTS (BT's SystemX) using a Voicetronix
> > OpenSwitch12 card and the vpbhp driver.
> >
> > The echo occurs on both SIP->POTS calls, and SIP->SIP calls. I've tried 
>a
> > number of volume adjustments to correct the echo but it is always the 
>same.
> >
> > If anyone has any ideas I'd really appriciate some help, as this is a 
>major
> > urgency,
> >
> > Many many thanks,
> >
> > Ian Bonham
> >
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>--
>Tom
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