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

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(a)aol.com -----Original Message----- From: Alex Balashov <abalashov(a)evaristesys.com> To: sr-users <sr-users(a)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: 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/ _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users(a)lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users