Cisco Systems 1.3.0 manual Figure C-17. Call Flow Diagram Call Screening

C-46

SIP Phone		UA Marshal		Redirect Server	Feature Server:
					Call Screening
1. INVITE					toPhone
2. 100					SIP
		3.	INVITE		Phone
		4.	302		via
		5.	ACK		Gateway:
		6.	INVITE
		7.	100		Call
				8. INVITE	Screening
				9. 302
				10. ACK
		11. 403
		12. ACK
13.	403
14. ACK

Figure C-17. Call Flow Diagram: Call Screening