Dynamics Telephony will automatically display the name of the caller when they call in to your phone.

Click on the Call Tab to automatically answer the call and see a full pop of the callers Account / Contact / Lead record or a Phone Call activity for the caller. The callers record will also get a Phone Call activity so you can see the full call history

If the callers number is in multiple accounts / contacts / leads then you get a list of all the matches to choose from.