like superdrago say, you need to provide more data about your project, how much channels do you want to put, how much ppl you will have, do you have VOD / Series?
you will use FHD or HD,
for example, basic user (100 or 200) each one with 3 connection, and your channels are in FHD with bitrate 5000K plus
you will get maximum of 5mb X 3 X 100 =1500mbx s
and more, so if you can give us more data we can give you some resources