[Sip-implementors] Call definition

[Ashwani Kumar Kesharwani]

I am in doubt regarding call.   Suppose user 'A' invites user 'B' with call Id 'C1'.   Now if User 'A' wants to invite user 'C' with in same call,  will  it use the same call id, that is  'C1'.     A ----------Invites with call Id C1 -------------> B A-----------Invites with Call Id C1 -------------> C       Is this OK.