Cisco ATA-186 Administration Guide - Page 188
CiscoATA-to-CiscoATA—Basic SIP to SIP Call without Authentication
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Call Flow Scenarios for Successful Calls Appendix D SIP Call Flows Cisco ATA-to-Cisco ATA-Basic SIP to SIP Call without Authentication Figure D-3 illustrates a call from one Cisco ATA to another. Authentication by the SIP server is not required. The call flow is as follows: 1. Call is established between Cisco ATA A and Cisco ATA B. 2. Call is terminated. Figure D-3 Cisco ATA-to-Cisco ATA-Basic SIP to SIP Call without Authentication Cisco ATA 186 A IP network SIP server IP network Cisco ATA 186 B V V 1. INVITE 2. 100 Trying 6. 180 Ringing 8. 200 OK 9. ACK 11. BYE 12. 100 Trying 2-way voice path 15. 200 OK 3. INVITE 4. 100 Trying 5. 180 Ringing 7. 200 OK 10. ACK 13. BYE 14. 200 OK 72119 Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator's Guide (SIP) D-6 OL-3410-01