![](/images/new-backgrounds/1310414/310414375x1.webp)
Appendix D SIP Call Flows
Call Flow Scenarios for Successful Calls
Cisco
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
1.INVITE
2.100 Trying
6. 180 Ringing
8.200 OK
9.ACK
11.BYE
12.100 Trying
15. 200 OK
3.INVITE
4.100 Trying
5.180 Ringing
7.200 OK
10.ACK
13.BYE
14.200 OK
V
72119
Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (SIP)
|
|
| |
|
|