I'm interested in learning more about "PATWAS or Pilots Automatic Telephone Weather Answering System

I was reading about it and understand it's kind of like TIBS and I wanted to access it to get a first hand experience but I can not figure out how too/what number to dial. If you dial 800WXBRIEF and press 3 you get connectedto TIBS, butI'm pretty sure PATWAS is something entirely different. I'm not sure exactly what the difference is though. Any help would be appreciated