Download the Putty here
1. Log in Yeastar S-Series IPPBX, go to Settings > System > Security > Service, enable SSH.
2.Enter the IP of Yeastar S-Series IPPBX and SSH port(default is 8022).
3.Then configure the putty with enough lines.
4.Login the SSH with username/password: support/iyeastar(or random password).
If the password is incorrect you need to login to the web and go to Settings > security > service to disable and enable SSH, then you can see the password pop up.
5.Then input the commands:
6. Make the test call or other tests relevant with your issue. Finally copy all of the logs and save them in a .txt file. And send us the log.
To write the full log into desktop of your PC, you can configure the putty like this, then all logs will be written into putty.log on desktop.