Cisco Systems IP phone 7960 Cisco SIP IP Phone-to-Cisco SIP IP PhoneCalled User Does Not Answer

AppendixB SIP Call Flows
Call Flow Scenarios for Failed Calls
B-68
Cisco SIP IP Phone 7960 Administrator Guide
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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.
FigureB-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