Railwaire provides connection through adsl modem like bsnl or through local cable operator ?
I am using RailWire, switched from BSNL to railwire 2 months back. They provide FTTH. It is provided by local cable operator. I am happy with RailWire, BSNL i have many failures, these guys don't care, when i have a frequent disconnect problem, i book, then they completely mess up the line for working, they just disconnect the line or something, so i don't get internet for a day, then they fix it next day. It is more of an OLD cable problem, lack of cable etc... With FTTH, they have tools to check signal strength etc.. so you will have less problems related to line issues.
So far i had 2 disconnects with RailWire, one i called cable operator, he said railwire issue, everyone have problem, that got resolved in like 2 hours. Last issue was yesterday like 1:30 AM in morning, that got resolved when i wake up in morning. I think this is more related to heavy rain here.