I have noticed a label in my Gmail with name Call Log. And it contains the some Call Logs of my Phone. I haven't created that Label. I thought it was because of the Mails synchronization. But the same thing isn't happening now-a-days. The Call Logs label mail box contains the information about only few days. After that it stopped logging the Call Logs information.

I want to synchronize the Call Logging information on my Gmail. How to do that ?