Cisco Systems 186 Manual De Usuario
D-2
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
Call Flow Scenarios for Successful Calls
This section describes call flows for the following scenarios:
•
•
•
•
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
illustrates 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
Table D-1
Action Descriptions
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.
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.
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.
registration is complete.
1. REGISTER
2. 100 Trying
3. 200 OK
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Cisco ATA 186
IP network
SIP server