Hi Karthick
You can make such calls in the same way you use a mobile to provide internet for the laptop. Follow these steps:
1. Pair the device (mobile phone) and connect it with the laptop
2. Go to Devices > Bluetooth devices, then select this paired device and right-click it.
3. Then select phone operation tab. A pop-up window will appear which will allow you to make calls and send SMS from your laptop.
Hope this helps 