Cisco 7960 - Page 112

Appendix B SIP Call Flows
Call Flow Scenarios for Successful Calls
B-4
Cisco SIP IP Phone 7960 Administrator Guide
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Figure B-1 Gateway-to-Cisco SIP IP Phone—Successful Setup and Disconnect
IP
3. Call Proceeding
6. Alerting
8. Connect
12. Disconnect
1. Setup
PBX A
SIP IP Phone
User B
User A
GW1 IP Network
4. 100 Trying
11. BYE
5. 180 Ringing
7. 200 OK
2. INVITE
2-way RTP channel2-way voice path
10. ACK
14. 200 OK
9. Connect ACK
13. Release
15. Release Complete
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