Question: When sending request INVITE to SBC, SIP client tells him its SIP address, right? When sending request INVITE to P-CSCF, does this "unknown" IP know SIP address or wants it? (I suspect this "unknown" IP belongs to device from Ericsson TSP applications "box" (regarding to my IMS reference paper), where HSS, I-CSCF, S-CSCF, P-CSCF etc. are.) Maybe a little confused question (and thinking)...but I'm dilemma. asked 30 Apr '11, 15:58  wired |
One Answer:
If it helps, here you can see where this IP lies.
answered 30 Apr '11, 17:01 wired |
9 2.304519s SIP client Session Border Controller (SBC) SIP/SDP 917 Request: INVITE sip:[email protected]_domain.net, with session description
13 2.311316s 10.253.70.197 P-CSCF SIP/SDP 1105 Request: INVITE sip:[email protected]_domain.net, with session description
These packets are parts of prepaid call from SIP client do circuit switched domain.
I'm not sure I understand the question, on IP level the client's (UE) INVITE will go to the IP of the SBG:s access side, on the core side the sourc IP will be that of the SBG:s core interface. e.g The INVITE going to P-CSCF will have the IP address of SBG core. /Anders
That's ok, fine explanation.
But in Wireshark info (about packet) there's a sip:[email protected]_domain.net (in real it's actual SIP address of client), so if I understand clearly, INVITE going from 10.253.70.197 to P-CSCF, includes this SIP address?