Yealink CP860 [377/417] Successful call setup and disconnect

Appendix

365

 SIP 2xx—Successful Responses

 SIP 3xx—Redirection Responses

 SIP 4xx—Client Failure Responses

 SIP 5xx—Server Failure Responses

 SIP 6xx—Global Failure Responses

The following figure illustrates the scenario of a successful call. In this scenario, the two

end users are User A and User B. User A and User B are located at Yealink SIP IP

phones.

The call flow scenario is as follows:

1. User A calls User B.

2. User B answers the call.

3. User B hangs up.

User A Proxy Server User B

F1. INVITE B

F2. INVITE B

F3. 100 Trying

F9. ACK

F10. ACK

F5. 180 Ringing

2-way RTP channel established

F8. 200 OK

F7. 200 OK

F6. 180 Ringing

F4. 100 Trying

F11. BYE

F12. BYE

F13. 200 OK

F14. 200 OK