Cisco Systems 1.3.0 manual Via

SIP Phone	UA Marshal		Redirect Server	5300 Marshal		SIP
						Cisco 5300
1. INVITE						Phone to
2. 100
	3.	INVITE				Phone
	4.	302				via
	5.	ACK				Gateway:
	6.	INVITE
	7.	100				Called
				8. INVITE
				9.	100	Party is
				10.	183
						Busy
	11. 183
12. 183
				13.	200
	14. 200
15. 200

Figure C-11. Call Flow Diagram: SIP Phone to Phone: Called Party is Busy — Diagram 1

C-27