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Appendix C SIP Call Flows
Call Flow Scenarios for Successful Calls
C-8
Cisco IP Phone Models 7905G and 7912G Administrator Guide (SIP)
OL-4277-01
Figure C-3 Cisco IP Phone-to-Cisco IP Phone—Basic SIP to SIP Call without Authentication
1. INVITE
IP network IP networkSIP server
2. 100 Trying
3. INVITE
4. 100 Trying
5. 180 Ringing
6. 180 Ringing
7. 200 OK
8. 200 OK
9. ACK
10. ACK
11. BYE
15. 200 OK
13. BYE
14. 200 OK
94054
2-way voice path
Cisco IP Phone A
IP
Cisco IP Phone B
IP