Yealink SIP-T38G

Appendix
349
Step
Action
Description
User B
User A wants to disconnect the call.
F7
200 OK—User B to Proxy
Server
User B sends a SIP 200 OK response to
the proxy server. The SIP 200 OK
response indicates that User B has
received the CANCEL request.
F8
200 OK—Proxy Server to User
A
The proxy server forwards the SIP 200
OK response to notify User A that the
CANCEL request has been processed
successfully.