Good morning.I have following example schemaSIP PHONE -> CISCO 887 -> SIP GATEWAY1) SIP phone register on SIP gateway and sendREGISTER sip:sip.gateway.com SIP/2.0Via: SIP/2.0/UDP 10.111.111.6:5060;branch=z9hG4bK-t8pe125htptd;rport ......2) Everything...