Appendix D SIP Call Flows
Call Flow Scenarios for Successful Calls
Table D-2 Log Listings
1.REGISTER sip:192.168.2.97 SIP/2.0 Via: SIP/2.0/UDP 192.168.2.194
From: <sip:9301@192.168.2.97;user=phone>
To: <sip:9301@192.168.2.97;user=phone>
CSeq: 1 REGISTER
Contact: <sip:9301@192.168.2.194;user=phone;transport=udp>;expires=3600
2.SIP/2.0 100 Trying
Via: SIP/2.0/UDP 192.168.2.194
From: <sip:9301@192.168.2.97;user=phone>
To: <sip:9301@192.168.2.97;user=phone>
CSeq: 1 REGISTER
3.SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.2.194
From: <sip:9301@192.168.2.97;user=phone>
To: <sip:9301@192.168.2.97;user=phone>
CSeq: 1 REGISTER
Contact: <sip:9301@192.168.2.194;user=phone;transport=udp>;expires=“tue, 23 Oct 2001 14:24:57 GMT”
Expires: 3600
Cisco ATA-to-SIP Server—Registration with Authentication
Figure D-2 illustrates the Cisco ATA registering with the SIP server. Authentication is required for registration.
The call flow is as follows:
1.Cisco ATA requests registration.
2.SIP server requests authentication credential.
3.Authentication is received and registration is completed.
Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (SIP)
| ||
|