Keypad button in Teams Meeting

Hi Devryk 

This is a useful feature in Microsoft Teams Meeting. This is useful for those users who dial-out from the Microsoft Teams Meeting using the Microsoft Teams Audio Conferencing Services.

The Same Dial-Pad on the Microsoft Teams Client can be used to make a PSTN Call out from Microsoft Teams to the PSTN Network on a Mobile or Landline provided you purchase a Microsoft Teams Calling Plans from Microsoft or Microsoft Teams Direct Routing from an ISP

Here is a Reference Article to the same

https://networking-talks.blogspot.com/2020/04/microsoft-teams-audio-conferencing-for.html