[SR-Users] Cannot hear voice with symmetric NAT and STUN

[Mitan Lopez]

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)


Mitan Lopez
mitan23 at aol.com




-----Original Message-----
From: Alex Balashov <abalashov at evaristesys.com>
To: sr-users <sr-users at lists.sip-router.org>
Sent: Mon, Mar 4, 2013 3:25 pm
Subject: Re: [SR-Users] Cannot hear voice with symmetric NAT and STUN


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: http://www.evaristesys.com/, http://www.alexbalashov.com/

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