Setup your Mitel call routing to automatically forward to your voicemail after a certain number of rings.
\uD83D\uDCD8 Instructions
Login to the Mitel application using your A# and secure password.
Select your phone number by your name.
Select the gear icon ⚙ on the right side of the screen.
Select Call Routing and the second option to configure it to ring 4 times and then forward to your voicemail.
Configure your settings to Forward the call to my voicemail and 4 rings before forwarding.
Select Save.
In testing, it rings one more than you selected. If you would like it to forward after 4 rings, select 3.