VSNL Dial up is really working out good now a days. The speed is great. If you have tried any other ISP, then you will definitely appreciate VSNL. Among the players who are presently available in the market, VSNL is doing best among all.
This was not the case a couple of years ago. VSNL was terribly lacking in all aspects. They have improved a lot.
You can purchase 100 hrs pack for Rs.750 which is valid for 3 years in which the usage between 11 PM to 8 AM and on sundays is absolutely free.
VSNL dial up is reliable and you can go for it.