Cisco 7960 - Dialing Your Telephone

Appendix B SIP Call Flows
Call Flow Scenarios for Successful Calls
B-32
Cisco SIP IP Phone 7960 Administrator Guide
78-10497-02
Figure B-7 Cisco SIP IP Phone-to-Cisco SIP IP Phone Call Transfer without Consultation
IP IP IP
2. 180 Ringing
3. 200 OK
2-way RTP channel
A and B are disconnected.
4. ACK
5. BYE (Also: C)
6. 200 OK
1. INVITE B
8. 180 Ringing
9. 200 OK
2-way RTP channel
10. ACK
7. INVITE C (Requested by B)
IP Network
SIP IP
Phone User A
SIP IP
Phone User B
SIP IP
Phone
User C
41468