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

Alex Balashov abalashov at evaristesys.com
Mon Mar 4 12:00:00 CET 2013


On 03/04/2013 05:43 AM, Mitan Lopez wrote:

> So RTP proxy servers are used most of the time in Internet to
> communicate between 2 UA's? (in this case why bother to check all those
> lines in kamailio cfg?)

Between two UAs that either (1) do not have network and transport-layer 
reachability to each other, such that an intermediate RTP relay is 
needed, because they cannot send RTP to each other directly through UDP 
or (2) between which topology hiding is desired.

Otherwise, no.

-- 
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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