Call From A Cisco Sip Ip Phone To A Gateway Acting As A Backup Proxy In A Sip Network - Cisco 7960G Administrator's Manual
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Also See for 7960G:
- Administration manual (184 pages) ,
- User manual (122 pages) ,
- Phone manual (74 pages)
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Call Flow Scenarios for Successful Calls
Call from a Cisco SIP IP Phone to a Gateway Acting As a Backup Proxy in a SIP Network
Figure B-15
proxy.
Figure B-15 Call from a Cisco SIP IP Phone to a Gateway Acting As a Backup Proxy
SIP IP Phone
Cisco SIP IP Phone Administrator Guide, Release 6.x and 7.x
B-42
illustrates a successful call from a Cisco SIP IP phone to a gateway acting as a backup
Primary
User A
IP
1. INVITE
2. INVITE (retry)
3. INVITE (retry)
4. INVITE (retry)
5. INVITE (retry)
6. INVITE (retry)
7. INVITE (retry)
8. INVITE (retry)
11. 100 Trying
13. 180 Ringing
15. 200 OK
16. ACK
18. BYE
21. 200 OK
GW
9. Setup
10. Call Proceeding
12. Alerting
14. Connect
17. Connect ACK
2-way voice path
19. Disconnect
20. Release
22. Release Complete
Appendix B
SIP Call Flows
User B
PBX
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