Appendix
341
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 the 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
Summary of Contents for SIP-T38G
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