<font color='black' size='2' face='arial'>then what would be this bad DSP or RTP packages dropping reason for that makes such noises? (for example if I speak louder that train soud gets louder or when I speak low the win/train sound gets lower as well)<br>
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<div style="clear:both">Mitan Lopez<br>
mitan23@aol.com<br>
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<div style="font-family:arial,helvetica;font-size:10pt;color:black">-----Original Message-----<br>
From: Alex Balashov <abalashov@evaristesys.com><br>
To: sr-users <sr-users@lists.sip-router.org><br>
Sent: Mon, Mar 4, 2013 3:25 pm<br>
Subject: Re: [SR-Users] Cannot hear voice with symmetric NAT and STUN<br>
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<pre style="font-size: 9pt;"><tt>On 03/04/2013 06:53 AM, Mitan Lopez wrote:
> I understand, but some times 2 UAs have audio one side voice is clear
> but in other side voice is just like train sound (or wind sound) is
> this from NAT too?
No. NAT does not introduce any acoustic anomalies; it would simply
prevent the reachability of audio altogether. What you describe sounds
like a bad DSP or gateway similar.
... unless the handset you are using generates this kind of noise when
it is not receiving incoming RTP.
-- Alex
--
Alex Balashov - Principal
Evariste Systems LLC
235 E Ponce de Leon Ave
Suite 106
Decatur, GA 30030
United States
Tel: +1-678-954-0670
Web: <a href="http://www.evaristesys.com/" target="_blank">http://www.evaristesys.com/</a>, <a href="http://www.alexbalashov.com/" target="_blank">http://www.alexbalashov.com/</a>
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