Hello Vasiliy,

Thanks for replying.

Not sure why Linphone-Android won't receive INVITE, since it is responding well to the keep-alive OPTIONS messages from proxy.

Both, proxy and SIP server are sending packets to UAb on which UAb is apparently responding to only proxy.

Is this a genuine flaw in Linphone OR some flaw in my configuration of proxy ?

On Wed, May 20, 2015 at 2:43 PM, Vasiliy Ganchev <vasiliy.ganchev@wildix.com> wrote:

Looks like UAb (3G) do not receive the INVITE (or makes no answer for some
reason).
Can you check if UAb is receiving the INVITE?
LinphoneAndroid that you use as a User-Agent on UAb has to log something.

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MathuRahul