MikroTik is an amazing Router OS. what about your DVB card is it internal or external?

You need Debian distro to setup internal DVB and do the routing
And concerning the dsl as upload Mikrotik supports DSL so you will have amazing network cable.

by the way if you are intrested too in any Radius & Billing system for your network you can contact me on msn maroon_ibrahim@hotmail.com

Greetings from Lebanon