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

[Juha Heinanen]

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?

-- juha