Which Bsnl Exchanges Offer Dataone?

Some of my friends locally ( in suburban coimbatore) keep asking me whether their exchanges would provide broadband connections. I have a rough idea that the feasibility depends on the distance of the consumer from the BSNL routers/servers. Do the bsnl websites give any details which can help? Having to go to their commercial office to get information is like half of a working day! I am really looking for shortcuts here.thanks

http://www.coimbatore.bsnl.co.in/ This site is not opening .
you may check your state's BSNL site to find the shortcuts (if any)
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news item from google search :
http://www.hindu.com/2006/07/03/stories/2006070321500200.htm