I am based out of Pune too and am in the business.
I dont see why u want to set a Call Center at STPI ( I assume thats what you mean by Software park)
The only third party Call Center that exists and does well in Pune is M Source( MPhasis BPO arm) the rest are bit players and havent gone very far at all
Setting up a Call center in the STPI premises will mean that you have to work with their SLA’s on redundancy and up times etc that they offer. While I am sure they are pretty good, I am not sure how you can work with them