asterisk users - Sep 2005 - strange wave like noise on sip handset

Hello

On a Sipura SPA-841 handset (and also at other end) you hear a sea wave like 
sound - it gets louder then softer and continually repeats.

I don't remember hearing this when using other handsets.  But what is this 
effect?  How can I reduce it?

Angus

On 9/30/05, Angus Comber <angus@iteloffice.com>
wrote:
> On a Sipura SPA-841 handset (and also at other end) you hear a sea wave
like
> sound - it gets louder then softer and continually repeats.
>
> I don't remember hearing this when using other handsets.  But what is
this
> effect?  How can I reduce it?
I heard the same thing from a remote users Polycom 501 - seems it was
sitting too close to a fan in a computer. Could it be something
similar to that?

Just a thought since this happened to me yesterday :)

--
Leif Madsen - http://www.leifmadsen.com
Astricon 2005, Anaheim, CA, October 12-14
http://www.astricon.net
http://www.oreilly.com/catalog/asterisk