This guide will show you how to activate the Do Not Disturb feature on your office phone, stopping incoming calls from ringing and going to voicemail. Callers will receive a busy signal.
Navigate to https://user.webex.com/
Log in with your Tarleton email address and password as prompted.

Click "Settings"

Click "Calling"

Click "Call settings"

Turn on "Do Not Disturb"

Optionally, you can enable "Allow ring reminder for Cisco IP phone." Your office phone will then sound a unique ringtone when called, to remind you that do not disturb is enabled.
Click "Save"

To turn off Do Not Disturb, repeat these steps and turn off the option.