On Tue, Mar 5, 2013 at 7:08 PM, Alex Balashov <abalashov@evaristesys.com> wrote:

On 03/05/2013 07:04 AM, Khoa Pham wrote:

When client use STUN, it can detect the NAT type. When client
register, it contains x-NAT (0:unknown, 1: full cone, ..., 6:
symmetric), which will be helpful for the server to detect NAT type.

Again, where are you finding these nonsymmetric clients?  The amount of non-symmetrical SIP and RTP implementations out there in the wild at this point is negligible.

--
Alex Balashov - Principal
Evariste Systems LLC
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