This is not anything specific to Airtel as such but I hope this information will be useful to most.
Also hope this is not "old news"
Intel has a basic version to just check the speed of your Broadband connection. It does not give any details of your download / upload speeds.
As I am yet to reach the 15 posts limit, I am not allowed to post any URLs so just google "Intel Broadband Speed Test" and you can see it as the first result called "Broadband Speed Test - Intel"