Cisco Ata-To-Cisco Ata-Basic Sip To Sip Call With Authentication - Cisco ATA-186 Administrator's Manual

Call Flow Scenarios for Successful Calls
Cisco ATA-to-Cisco ATA—Basic SIP to SIP Call with Authentication
Figure D-4
The call flow is as follows:
1.
2.
3.
Figure D-4
Cisco ATA 186 A
Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator's Guide (SIP)
D-12
illustrates a call from one Cisco ATA to another. Authentication by the SIP server is required.
Authentication is requested for call initiated by Cisco ATA A.
Call is established between Cisco ATA A and Cisco ATA B.
Call is terminated.
Cisco ATA-to-Cisco ATA—Basic SIP to SIP Call with Authentication
IP network
V
1. INVITE
2. 100 Trying
3. 407 Proxy Authentication Required
4. ACK
5. INVITE
6. 100 Trying
10. 180 Ringing
12. 200 OK
13. ACK
2-way voice path
15. BYE
16. 100 Trying
19. 200 OK
SIP server IP network
7. INVITE
8.100 Trying
9. 180 Ringing
11. 200 OK
14. ACK
17. BYE
18. 200 OK
Appendix D SIP Call Flows
Cisco ATA 186 B
V
OL-3410-01