Cisco 7960 - Zeroing Out to a Custom Operator

Appendix B SIP Call Flows
Call Flow Scenarios for Successful Calls
B-36
Cisco SIP IP Phone 7960 Administrator Guide
78-10497-02
Figure B-8 Cisco SIP IP Phone-to-Cisco SIP IP Phone Call Transfer with Consultation
IP IP IP
2. 180 Ringing
3. 200 OK
2-way RTP channel
A is put on hold. The RTP channel between A and B is torn down.
A and B are disconnected.
4. ACK
2-way RTP channel
B and C are disconnected.
2-way RTP channel
5. INVITE (c=IN IP4 0.0.0.0)
6. 200 OK
7. ACK
14. BYE (Also: C)
15. 200 OK
16. INVITE C (Requested by B)
18. 200 OK
19. ACK
17. 180 Ringing
1. INVITE B
13. 200 OK
11. ACK
12. BYE
8. INVITE C
9. 180 Ringing
10. 200 OK
IP Network
SIP IP
Phone User A
SIP IP
Phone User B
SIP IP
Phone
User C
41469