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Appendix C SIP Call Flows
Call Flow Scenarios for Successful Calls
C-4
Cisco IP Phone Models 7905G and 7912G Administrator Guide (SIP)
OL-4277-01
Cisco IP Phone-to-SIP Server—Registration with Authentication
Figure C-2 illustrates the Cisco IP Phone registering with the SIP server where
authentication is required for registration. Table C-3 describes these actions in
detail. Table C-4 shows the log of these actions.
The call flow is as follows:
1. Cisco IP Phone requests registration.
2. SIP server requests authentication credential.
3. Authentication is received and registration is completed.
Table C-2 Log Listing
1.
REGISTER sip:cisco.com SIP/2.0
Via: SIP/2.0/UDP 192.168.2.163:5060
From: <sip:9313@cisco.com;user=phone>;tag=1692201497
To: <sip:9313@cisco.com;user=phone>
Call-ID: 2923175725@192.168.2.163
CSeq: 1 REGISTER
Contact: <sip:9313@192.168.2.163:5060;user=phone;transport=udp>;expires=3600
User-Agent: Cisco-CP7905/1.01-030429A
Allow: ACK, BYE, CANCEL, INVITE, NOTIFY, OPTIONS, REFER, REGISTER
Content-Length: 0
2.
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 192.168.2.163:5060;received=192.168.2.163
Call-ID: 2923175725@192.168.2.163
From: <sip:9313@cisco.com;user=phone>;tag=1692201497
To: <sip:9313@cisco.com;user=phone>
CSeq: 1 REGISTER
Content-Length: 0
3.
SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.2.163:5060;received=192.168.2.163
Call-ID: 2923175725@192.168.2.163
From: <sip:9313@cisco.com;user=phone>;tag=1692201497
To: <sip:9313@cisco.com;user=phone>
CSeq: 1 REGISTER
Contact: <sip:9313@192.168.2.163:5060;user=phone;transport=udp>;expires="Fri, 02
May 2003 00:52:58 GMT"
Expires: 3600
Content-Length: 0