Bharat Sanchar Nigam Limited or BSNL Broadband is very popular broadband service available all over India in both urban and rural areas.
BSNL has many broadband plans like prepaid, postpaid and WiMax Broadband services ranging from 256kbps to 8Mbps and more download speed depends on the plan and location.
Also BSNL has plans based on Time, Data and Unlimited plans.
If your BSNL Broadband plan is data limited (maximum upload and download limit per month) then it is advisable to check the Broadband bandwidth usage often to make sure that it falls within the limit. Once it crosses the limit then all broadband service providers including bsnl charges extra amount which is per MB basis.
You can check your BSNL broadband usage here
Apart from the BSNL broadband check (Usage detail portal), this DataOne official site offers other tools like Check Download Speed, Speed Tester for 8Mbps and above connection, Webmail for bsnl users, how to configure and secure your Wi-Fi Modem and instructions for configuring your Mail client like Outlook Express.
In this portal Dataone Account Administration can be done only from a DataOne connection.