Web Centers

I recently set up a network-based solution for a company in the US by integrating their Web site and call center. The Web center enabled their customers to interact with them via e-mail, Web Collaboration, Web Callback, intelligent chat, fax, voice mail, telephone etc – all of which are managed in a completely integrated solution.

I see the benefits the web center has for smaller call centers and start-up call centers because the upfront cost is minimal for the hardware. What are some advatages for larger call centers and how would I approach a larger call center with these services?

Thanks for your help.
Brian