[SIP Beyond VoIP] sip-session register contact tcp port does match source tcp port

Saúl Ibarra Corretgé saul at ag-projects.com
Mon Apr 8 13:16:33 CEST 2013

On Apr 8, 2013, at 10:10 AM, Juha Heinanen wrote:

> Saúl Ibarra Corretgé writes:
>> IIRC it's a feature. We create a single TCP transport for all accounts
>> to receive incoming calls, but new TCP connections are created when
>> sending requests out.
> most mobile networks seem to block new incoming tcp sessions towards
> customer.  will sipclient also accept incoming call comes along the tcp
> session that it established for outgoing calls?

TBH I'm not sure, I'll check that out, but I'm assuming yes, otherwise it wouldn't work behind NAT.

Saúl Ibarra Corretgé
AG Projects

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