Cisco 7905G Administrator's Manual page 200

Call Flow Scenarios for Successful Calls
Table C-7 Action Descriptions (continued)
Step Action
Step 13 ACK—Cisco IP Phone A to SIP server
Step 14
ACK—SIP server to Cisco IP Phone B
A two-way voice path is established between Cisco IP Phone A and Cisco IP Phone B.
Step 15 BYE—Cisco IP Phone A to SIP server
Step 16
BYE—SIP server to Cisco IP Phone B
Step 17 200 OK—Cisco IP Phone B to SIP server
Step 18 200 OK—SIP server to Cisco IP Phone A
Cisco IP Phone Models 7905G and 7912G Administrator Guide (SIP)
C-18
Description
Cisco IP Phone A sends acknowledgment of
the 200 OK response to the SIP server to pass
on to Cisco IP Phone B.
SIP server passes ACK response to
Cisco IP Phone B.
Cisco IP Phone A terminates the call session
and sends a BYE request to the SIP server
indicating that Cisco IP Phone A wants to
terminate the call.
SIP server passes the BYE request to
Cisco IP Phone B.
Cisco IP Phone 186 B sends a 200 OK
message to the SIP server indicating that
Cisco IP Phone 186 B has received the BYE
request.
SIP server passes the BYE request to
Cisco IP Phone A.
Appendix C SIP Call Flows
OL-4277-01