Appendix C SIP Call Flows
Call Flow Scenarios for Successful Calls
C-2
Cisco IP Phone Models 7905G and 7912G Administrator Guide (SIP)
OL-4277-01
The following types of responses are used by SIP and generated by the Cisco SIP
gateway:
•
SIP 1xx—Informational responses
•
SIP 2xx—Successful responses
•
SIP 3xx—Redirection responses
•
SIP 4xx—Client Failure responses
•
SIP 5xx—Server Failure responses
•
SIP 6xx—Global Failure responses
Call Flow Scenarios for Successful Calls
This section describes call flows for the following scenarios:
•
Cisco IP Phone-to-SIP Server—Registration without Authentication,
page C-2
•
Cisco IP Phone-to-SIP Server—Registration with Authentication, page C-4
•
Cisco IP Phone-to-Cisco IP Phone—Basic SIP to SIP Call without
Authentication, page C-7
•
Cisco IP Phone-to-Cisco IP Phone—Basic SIP to SIP Call with
Authentication, page C-15
Each of the call flows includes a call diagram, action descriptions table, and a
sample log file.
Cisco IP Phone-to-SIP Server—Registration without
Authentication
illustrates the Cisco IP Phone registering with the SIP server where
authentication is not required for registration.
in detail.
shows the log of these actions.
The call flow is as follows:
1.
Cisco IP Phone requests registration.
2.
Registration is completed.
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