Cisco Systems 1.3.0 manual Sip

						SIP
SIP Phone		UA Marshal		Redirect Server	SIP Phone	IP
1. INVITE						Phone
2.	100
						to
		3.	INVITE			SIP IP
		4.	302			Phone:
		5.	ACK
		6.	INVITE			Call
		7.	302			Setup
		8.	ACK			and
		9.	INVITE			Disconnect
		10. 100
		11. 180
12.	180
		13. 200
14.	200
15. ACK

Figure C-5. Call Flow Diagram: SIP Phone to SIP Phone — Diagram 1

C-9