I'm currently in Telecommunications (in a 'provisioning' position). I've been doing this type of work for about 6 or 7 years.. it's certainly not my main love in life.
BTTT
BTTT
Right now people who know VOIP inside out are in huge demand. You could easily set up your own company to help local and regional ISPs provision VOIP into their networks, and get paid big bucks to do so. Buy used equipment off of eBay, set up your own VOIP integration lab, play around with creating VOIP solutions, test them exhaustively, and you could make bank on just selling VOIP solutions to small businesses dependent upon PBXs in your local area. Call around to the PBX solution providers in your area, pretend to be a small business, and get quotes on small 5-10 and 10-20 line systems, and figure out if you can under cut them with a system is slightly cheaper, easier to maintain, and offers more features.
.. it's certainly not my main love in life.
Well, I certainly wouldn't advise going into business for yourself in an area you aren't enthusiastic about. But there are plenty of successful examples of people turning what they really like into a business. It just takes some creativity.