You can see all call progress on Asterisk CLI (command line interface).
To login to Asterisk CLI you need:
- SSH to your Asterisk server as root
Now you will see all call progress on the screen.
To leave Asterisk CLI type exit and press ENTER
Following video shows how to do that:
To see what sip messages are going through the Asterisk, execute this command:
sip set debug on
To disable it:
sip set debug off