hi,
i think as of now it is wait and watch as far as VOIP is concerned in the call center industry, because it is not yet known as to what will be the delay in the voice etc. but i do agree that it could turn out to be an option for call centers.
it would be nice to interact with you, my contact details are :
email -
taruncallcenter@rediffmail.com
mobile - +91 98111 41111
Regards,
Tarun Puri