To start a call center you need so many things just like
2.The hardwear and softwear from a good who can give you complete tech.support 24X7.
4.Good staff technical as well as nontechnical (it depands on the process.).
1.Office area as per the agents seats.
2.The VOIP hardware and software 3.Complete tech.support 24X7.
3.Planning of different process.
4.Good staff technical as well as nontechnical depending upon the processes