What do you need to start an Online Call Recording Business?

Anyone here has any knowledge about how these kind of websites work?

  1. http://www.recordmycalls.com/
  2. http://www.callrecordercard.com/

I’d like to start a similar online business but i don’t know what do you need for it.
What’s the system behind these online call-recording websites?

Cheers,
Ciprian

First & foremost, being familiar with all the federal, state, and interstate laws regarding phone taps and the recording of phone calls.

I’m not from the USA and i’m not planning on targeting the US market.
The site will run and obey the Romanian laws on this matter.