The Internet, data and pretty soon your phone are going to be hooked up. It depends on the job. If you're working with a vendor, be prepared to put in long hours. When you're installing a phone system, you don't go home until that phone system works, even if that's five in the morning. It depends on where you're working.
Some companies pay higher than others.
You have to know you're good in a crunch. You get screamed at a lot. People only talk to you when something is wrong. Even if you're installing brand-new switches at five in the morning, you have to be good in a crunch because you're going to run into problems. This is one of the best industries to be in right now.