With Teams calling, you will no longer need to dial 8 or 9 to make a call to an outside line. When making a call to an outside line you will need to dial all 10 digits for the phone number you wish to dial (3-digit area code + 7-digit phone number) Once you have entered the number in the dial pad press the call button. You have various options for making a call within Teams:

• Dialing a number into the Dial pad
• Selecting a contact from your Speed dial
• Selecting a contact from your Contacts
• Pressing the call button from the Chat pane

For more information on making a call in Teams, please see the following articles from Microsoft:

• Use the dial pad to make a call
• Make Calls
• Start a call from a chat in Teams
• Missing Dial Pad