Whenever I discuss Asterisk or Trixbox with someone the questions always comes up... "Does it work with Skype ?".  I was forced to answer no until recently when I came across a new product called ChanSkype .  The developers at ChanSkype have developed a conduit between Asterisk and Skype that enables inbound and outbound calls via the Skype client on your Trixbox.  You can receive Skype calls from other Skype unsers, make unlimited outbound calls via SkypeOut for $30 a year and receive unlimited inbound calls via SkypeIn calls for $30 a year.  That is only $5 a month for unlimited inbound and ourbound calls! The ChanSkype software we are using in the HOWTO isn't free but a single channel license (one call at a time) is only $20.

Updated for Trixbox!

Simply put ENUM is a way for those of us that utilize VOIP to avoid using the PSTN to establish a call between to VOIP systems with out using the PSTN.  Think of it as a true Internet Phone - no phone company of any kind needed.   Your probably asking "Don't I do this already?".  Well if both you and the person your calling are using the same VOIP provider you are doing the next closest thing but still using a third party to complete your call.  Imagine being able to call from one * box to another * box directly over the internet without involving a third party.