asterisk users - Sep 2005 - Asterisk Echo problems, Urgent, please help,

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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What kind of POTS trunks/cards are you using?

--
Tom

On 9/29/05, Ian Bonham <bon_the_one@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
>
> _________________________________________________________________
> FREE pop-up blocking with the new MSN Toolbar - get it now!
> http://toolbar.msn.click-url.com/go/onm00200415ave/direct/01/
>
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--
Tom