Guys it is very easy to setup a call center.
For a small sized center do not bother with Technology. Just rent a Hosted dialer solution with Voip etc all from one single source . Take a OSP License from the DOT in Delhi. All you need in Infrastructure is Computers, headsets and Internet connection. Initail invesment will work out to be very low:
Computers Rs1000 p.m. rent
Internet : Rs.2000 p.m. per seat
Dialer rental: Rs.5500 p.m. per seat
Long Dist Telephone : Rs5000 p.m. per seat.
If you need any assistance , contact me, find me on google or yahoo.