Cisco Systems 188, 186 manual Trying Proxy Authentication Required ACK

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-4illustrates 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

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

V

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Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (SIP)

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