|If you want to make a phone call, you'll need to connect your phone line to your modem if you have one on your computer.|
Using Dialer, you can then call the number by selecting Phone Call, typing in the number, and clicking "Place Call."
If you don't have a modem, that feature won't work, and you'd only be able to use the "Internet Call" option.
Why not just use your landline or cellphone to check the phone number?
message edited by Jennifer SUMN