C-92

SIP IP Phone to SIP IP Phone: Forward to Voice Mail
Figure C-30. SIP IP Phone to SIP IP Phone: Forward to Voice Mail — Diagram 1
SIP Phone UA Marshal
1. INVITE
2. 100
Redirect Server
3. INVITE
4. 302
5. ACK
Feature Server: FNA
6. INVITE
7. 100
8. INVITE
9. 100
10. INVITE
11. 302
12. ACK
SIP Phone
13. INVITE
14. 100
15. 180