serverinvitesession.dot

这是国外的resip协议栈

digraph ServerInviteSession {
	node [ fonstsize=8 fontname="VeraSans-Roman" ]
	graph
	[
//		ranksep=1.5 // modify to shrink nodes etc
//		nodesep=1.5
		fontsize=8
		fontname="VeraSans-Roman"
		labelfontsize=8
		labelfontname="VeraSans-Roman"
	]

	edge
	[
		fontname="VeraSans-Roman"	
		fontsize=8
		arrowhead=normal
	]

// Now setup labels and visual stuff.

        fontname="VeraSans-Roman"

        Start -> Proceeding
                [ label="INVITE" ]
        Proceeding -> Proceeding
                   [ label="1xx from TU" ]
        Proceeding -> Terminated
                 [ label="CANCEL" ]
        Proceeding -> Terminated
                 [ label="3xx-6xx\nfrom TU" ]
        Proceeding -> Accepting
                 [ label="2xx from TU\ncreate timer" ]
        Accepting -> Connected 
                 [ label="Ack to 200" ]
        Connected -> Terminated
                   [ BYE ]         
}