[OpenSER-Users] One way audio calling a -> b, two way audio calling b -> a with two phones behind the same NAT

[Mike Fedyk]

Hi,

I am having some trouble with nat traversal.  Depending on which phone is
originating the call, it may either have one way audio, two way, or even
neither.

Here is the matrix I have tested so far.  Hardphone to hard phone works fine
between two spa942 or either of the spa942 phones and the budgetone, the
problems come into the picture when soft phones are used.

caller		callee		RTP direction
budgetone		linphone		neither
budgetone		spa942		both
budgetone		xlite			both
linphone		budgetone		one way
linphone		spa942		one way
linphone		xlite			neither
spa942		budgetone		both
spa942		linphone		neither
spa942		xlite			one way
xlite			budgetone		both
xlite			linphone		both
xlite			spa942		both


Openser.cfg
http://pastebin.ca/946561