C-36

SIP IP Phone to SIP IP Phone: Forward All Calls
Figure C-14. Call Flow Diagram: SIP IP Phone to SIP IP Phone: Forward All Calls — Diagram 1
SIP Phone UA Marshal
1. INVITE
2. 100
Redirect Server
3. INVITE
4. 302
5. ACK
Feature Server: FAC
6. INVITE
7. 100
8. 302
9. ACK
10. 302
11. ACK
12. INVITE
13. 100
14. INVITE
15. 302
SIP Phone