Hi Sheena Howard,
This is a great question, for voice calls: you'll need to pair/sync a bluetooth headset, earbud or ear pod with you laptop for Dialpad. Depending on the bluetooth headset you want to use, you can pair it as follow:
Settings > Bluetooth & Devices > Devices > Add device > Bluetooth > Show all devices.
Make sure the bluetooth device is fully charge, power on and in pairing mode.



Hopefully this steps helped answering your question. Let me know if you need further assistance.