Cisco Systems 188, 186 manual Call Flow Scenarios for Successful Calls, Step Action Description

Appendix D SIP Call Flows

Call Flow Scenarios for Successful Calls

Call Flow Scenarios for Successful Calls

This section describes call flows for the following scenarios:

•Cisco ATA-to-SIPServer—Registration without Authentication, page D-2

•Cisco ATA-to-SIPServer—Registration with Authentication, page D-3

•Cisco ATA-to-CiscoATA—Basic SIP to SIP Call without Authentication, page D-6

•Cisco ATA-to-CiscoATA—Basic SIP to SIP Call with Authentication, page D-12

Each of the call flows includes a call diagram, action descriptions table, and a sample log file.

Cisco ATA-to-SIP Server—Registration without Authentication

Figure D-1illustrates the Cisco ATA registering with the SIP server. Authentication is not required for registration.

The call flow is as follows:

1.Cisco ATA requests registration.

2.Registration is completed.

Figure D-1 Cisco ATA-to-SIP Server—Registration without Authentication

Cisco ATA 186 IP network SIP server

V

1. REGISTER

2. 100 Trying

3. 200 OK

Table D-1 Action Descriptions

72117

Step	Action		Description
Step 1	REGISTER—Cisco ATA to SIP server		Cisco ATA sends a REGISTER message to the SIP server to register
			the address in the To header field.
Step 2	100	Trying—SIP Server to Cisco ATA	SIP server returns a 100 Trying message, indicating that the
			REGISTER request has been received.
Step 3	200	OK—SIP server to Cisco ATA	SIP server returns a final 200 OK response, confirming that
			registration is complete.

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

D-2 OL-3410-01