Cisco Systems 188, 186 manual Invite

Appendix D SIP Call Flows

Call Flow Scenarios for Successful Calls

Cisco ATA-to-Cisco ATA—Basic SIP to SIP Call without Authentication

Figure D-3illustrates 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

2-way voice path

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)

D-6 OL-3410-01