Can I use this?

Hi I’m trying to drop my phone bill and was wondering if I had a spare server on a 10mb would I be able to use it to call South Korea pretty cheap. Most of my business is back and forth from California to S. Korea and seeing if I’m able to use asterick to do this.

If so can someone give me a rough estimate on the cost for this…just the cost for using asterick and calling korea as I think I need to buy some sort of number or something from a Korean Telecom.

Also…I wish to learn how to do all this but not really sure since the docs are a bit confusing…anyone have a direct link to a easier way of setting up askerick to make calls internationally.