Cisco ATA-186 Administration Guide - Page 194

CiscoATA-to-CiscoATA—Basic SIP to SIP Call with Authentication

Page 194 highlights

Call Flow Scenarios for Successful Calls Appendix D SIP Call Flows Cisco ATA-to-Cisco ATA-Basic SIP to SIP Call with Authentication Figure D-4 illustrates a call from one Cisco ATA to another. Authentication by the SIP server is required. The call flow is as follows: 1. Authentication is requested for call initiated by Cisco ATA A. 2. Call is established between Cisco ATA A and Cisco ATA B. 3. Call is terminated. Figure D-4 Cisco ATA-to-Cisco ATA-Basic SIP to SIP Call with Authentication Cisco ATA 186 A IP network SIP server IP network Cisco ATA 186 B V 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 7. INVITE 8.100 Trying 9. 180 Ringing 11. 200 OK 14. ACK 17. BYE 18. 200 OK 72120 D-12 Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator's Guide (SIP) OL-3410-01

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D-12
Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (SIP)
OL-3410-01
Appendix D
SIP Call Flows
Call Flow Scenarios for Successful Calls
Cisco ATA-to-Cisco ATA—Basic SIP to SIP Call with Authentication
Figure D-4
illustrates a call from one Cisco ATA to another. Authentication by the SIP server is required.
The call flow is as follows:
1.
Authentication is requested for call initiated by Cisco ATA A.
2.
Call is established between Cisco ATA A and Cisco ATA B.
3.
Call is terminated.
Figure D-4
Cisco ATA-to-Cisco ATA—Basic SIP to SIP Call with Authentication
V
V
1. INVITE
Cisco ATA 186 A
Cisco ATA 186 B
IP network
IP network
SIP server
2. 100 Trying
3. 407 Proxy Authentication Required
4. ACK
5. INVITE
6. 100 Trying
7. INVITE
8.100 Trying
9. 180 Ringing
10. 180 Ringing
2-way voice path
11. 200 OK
12. 200 OK
15. BYE
13. ACK
14. ACK
16. 100 Trying
17. BYE
18. 200 OK
19. 200 OK
72120