<div dir="ltr">Hi all,<div><br></div><div>When using STUN, I can detect my NAT type. The SDP contain x-NAT field (0: unknown, 1: full cone, ..., 6: symmetric) which tells Kamailio the NAT type of clients. Why doesn't Kamailio use that ?</div>
</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, Mar 4, 2013 at 7:11 PM, Mitan Lopez <span dir="ltr"><<a href="mailto:mitan23@aol.com" target="_blank">mitan23@aol.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<font color="black" 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)<span class="HOEnZb"><font color="#888888"><br>
<br>
<div style="clear:both">Mitan Lopez<br>
<a href="mailto:mitan23@aol.com" target="_blank">mitan23@aol.com</a><br>
</div>
<br>
<br>
</font></span><div style="font-size:10pt;font-family:arial,helvetica"><div class="im">-----Original Message-----<br>
From: Alex Balashov <<a href="mailto:abalashov@evaristesys.com" target="_blank">abalashov@evaristesys.com</a>><br>
To: sr-users <<a href="mailto:sr-users@lists.sip-router.org" target="_blank">sr-users@lists.sip-router.org</a>><br></div><div class="im">
Sent: Mon, Mar 4, 2013 3:25 pm<br>
Subject: Re: [SR-Users] Cannot hear voice with symmetric NAT and STUN<br>
<br>
</div><div><div class="h5"><div style="font-size:12px;font-family:Tahoma,Verdana,Arial,Sans-Serif;margin:0px">
<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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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><span style="color:rgb(0,0,0)">Khoa Pham</span><br style="color:rgb(0,0,0)"><span style="color:rgb(0,0,0)">HCMC University of Science</span><br style="color:rgb(0,0,0)">
<span style="color:rgb(0,0,0)">Faculty of Information Technology</span><br>
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