One hundred years ago, telephony was a bit simpler. A variety of short courses, and one could be connecting Doctor Brown to a specialist in a far away city, such as New York, Boston, or even Green Bay, if the situation demanded it. In contemporary society, those interested in a viable and productive career in telephony must stay on top of the emerging technologies on a regular basis. This website from the Performance Technologies corporation can help them do just that. The site offers a number of tutorials on a number of networking and related telecommunications technologies and programs.