Specifications

Appendix
397
Step
Action
Description
response indicates that User B accepts
the transfer.
F27
BYE—User A to Proxy Server
User A terminates the call session by
sending a SIP BYE request to the proxy
server. The BYE request indicates that
User A wants to release the call.
F28
BYE—Proxy Server to User B
The proxy server forwards the BYE
request to User B.
F29
200OK—User B to Proxy
Server
User B sends a SIP 200 OK response to
the proxy server. The 200 OK response
notifies User A that User B has received
the BYE request.
F30
200OK—Proxy Server to User
A
The proxy server forwards the SIP 200
OK response to User A.