Setting up 15 Sites on WAN Using V-SAT T

I want to link 15 Sites together using
1. V-SAT Technology
2. and/or Dial-up to implement the
network design.
Please I need technical details on the necessary equipment and accesories to accomplish this design. Please note that out of the 15 sites there are 4 sites with 2 sub-sites each and 1 central site with 5 sub-sites. I will appreciate any comprehensive technical detail given. You can contact me on my email alexbucho@yahoo.com please feel free to send in any sketchor diagram if ncessary as an attachment to the mail for more clarity.

Thanks