Cisco ATA-186 Administration Guide - Page 184

Call Flow Scenarios for Successful Calls Appendix D SIP Call Flows Call Flow Scenarios for Successful Calls This section describes call flows for the following scenarios: • Cisco ATA-to-SIP Server-Registration without Authentication, page D-2 • Cisco ATA-to-SIP Server-Registration with Authentication, page D-3 • Cisco ATA-to-Cisco ATA-Basic SIP to SIP Call without Authentication, page D-6 • Cisco ATA-to-Cisco ATA-Basic SIP to SIP Call with Authentication, page D-12 Each of the call flows includes a call diagram, action descriptions table, and a sample log file. Cisco ATA-to-SIP Server-Registration without Authentication Figure D-1 illustrates the Cisco ATA registering with the SIP server. Authentication is not required for registration. The call flow is as follows: 1. Cisco ATA requests registration. 2. Registration is completed. Figure D-1 Cisco ATA-to-SIP Server-Registration without Authentication Cisco ATA 186 IP network SIP server V 1. REGISTER 2. 100 Trying 3. 200 OK 72117 Table D-1 Action Descriptions Step Action Step 1 REGISTER-Cisco ATA to SIP server Step 2 100 Trying-SIP Server to Cisco ATA Step 3 200 OK-SIP server to Cisco ATA Description Cisco ATA sends a REGISTER message to the SIP server to register the address in the To header field. SIP server returns a 100 Trying message, indicating that the REGISTER request has been received. SIP server returns a final 200 OK response, confirming that registration is complete. Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator's Guide (SIP) D-2 OL-3410-01