This article has web pages from Microsoft attached to it, which teaches how to call and manage calls on Microsoft Teams.
Make calls
Four things to know about calls
Start a call from a chat
Call a phone number
Answer a call
Reduce background noise
Add someone to a call
Make multiple calls at the same time
Put a call on hold
Transfer a call
Manage calls
Manage your call settings
Call forwarding, call groups, and simultaneous ring
Merge calls in Teams
Share a phone line with a delegate
Park a call
Check your voicemail
View or add contacts
View your call history
Turn off automatic video in a call
Use certified Teams devices to help manage calls and meetings
Get started with Teams phones
Get started with Teams displays