Cisco Systems 1.3.0 Manual De Usuario
C-
5
5
7
SI
P
P
I
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Phone to SIP IP Phone:
Cal
l Retur
n
Figure C-21. SIP IP Phone to SIP IP Phone: Call Return — Diagram 1
SIP Phone
UA Marshal
1. INVITE
2. 100
Redirect Server
3. INVITE
4. 302
5. ACK
Feature Server:
Call Return
6. INVITE
7. 100
8. INVITE
9. 302
10. ACK
11. INVITE
12. 100
13. INVITE
14. 302
15. ACK
SIP Phone