No it happens on our asterisk and at a customers. Not that noticeable but
not crystal clear. Didn't happen on a Snom 190.
I have been working my way through IP handsets with these results:
Grandstream BT-100 series. OKish for the price but a bit echoy.
Grandstream GXP-2000 - OK but if used on hands free a bit echoy.
Snom 190. Very clear. However, on a customer site they complained that
full volume was still not load enough. But didn't extensively test.
Sipura SPA-841 - when receiving an incoming call echoy for about 2-3 seconds
at start of call then echo went away. Remote end did not hear any echo.
Also wave like hiss as per my message.
Next phones to try are a Polycom 300 and a CISCO 7940.
I suppose it depends on how demanding customer is. I would hope that I can
find a phone with no echo / hiss /other problems. Perhaps I need to think
about using channel banks/FXS cards and analog phones! But would prefer IP
phones for flexibility etc.
Anyone found a perfect IP phone?
Angus
----- Original Message -----
From: "Leif Madsen" <[EMAIL PROTECTED]>
To: "Asterisk Users Mailing List - Non-Commercial Discussion"
<asterisk-users@lists.digium.com>
Sent: Saturday, October 01, 2005 2:33 PM
Subject: Re: [Asterisk-Users] strange wave like noise on sip handset
On 9/30/05, Angus Comber <[EMAIL PROTECTED]> 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
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