[Asterisk-Users] Echo with polycom phones

[Brent Franks]

Using Polycom SIP 500's here with *.  Have them going out on X100P cards
too.  We do hear a good amount of echo in the beginning but it does
trail off after 4 - 5 seconds.  The remote party can not here the echo.

The Polycom's are also pretty quiet, has anyone figured out how to
inject some background noise with these?

- Brent

-----Original Message-----
From: asterisk-users-admin at lists.digium.com
[mailto:asterisk-users-admin at lists.digium.com] On Behalf Of Sean Garland
Sent: Tuesday, January 06, 2004 4:03 PM
To: asterisk-users at lists.digium.com
Subject: RE: [Asterisk-Users] Echo with polycom phones

Yup, two x100p cards.  The echo goes away really quickly, but the first
second or two is pretty echoey (is that a word?)

Sean 

-----Original Message-----
From: Christian Hecimovic [mailto:checimovic at qworks.ca] 
Sent: Tuesday, January 06, 2004 10:27 AM
To: asterisk-users at lists.digium.com
Subject: Re: [Asterisk-Users] Echo with polycom phones

Hey Sean,

Are you using Zap modem cards (X100P)? There can be bad echo with those
things. The echo canceling effect you are hearing comes from the Polycom
phones - they dynamically "learn" from the echo at the beginning of the
call and adjust the echo cancellation accordingly. We are using a
Mediatrix SIP gateway now - no echo at all.

Christian

On Monday 05 January 2004 13:28, Sean Garland wrote:
> I have soundpoing ip 500 phones and the first few seconds of every 
> call has echo, which then goes away.  Is there a way to have the echo 
> cancel on at the beginning?  It seems like it is testing at the 
> beginning but it would be nice if I could have it start closer....
>
> Thanks
>
> Sean Garland
> Siskiyou Technology Consultants
> 205 N. Mt. Shasta Blvd. Suite 100
> Mt. Shasta, CA 96067
> Phone: (530)926-1489
> FAX: (530)926-6296
> sean at siskiyoutech.com

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