Cisco Systems IP phone 7960 IP Phone User Manual


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Appendix B SIP Call Flows
Call Flow Scenarios for Failed Calls
B-68
Cisco SIP IP Phone 7960 Administrator Guide
78-10497-02
Cisco SIP IP Phone-to-Cisco SIP IP Phone—Called User Does
Not Answer
Figure B-17 illustrates an unsuccessful call in which User A initiates a call to
User B but User B does not answer.
Figure B-17 Cisco SIP IP Phone-to-Cisco SIP IP Phone—Called User Does Not Answer
IP IP
2. 180 Ringing
4. 200 OK
3. CANCEL
1. INVITE B
IP Network
SIP IP
Phone User A
SIP IP
Phone User B
41476
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