So that was a class on introduction to Business Telephone Systems. Like I say, this is just supposed to be an overview. We’re going to have more in-depth classes on how all this works. Again, telephone systems, I mean compared to servers and compared to networks, they’re a joke. They are very easy to administer, but the main thing is that you have to understand what you’re doing. You have to understand all of these concepts of business telephone systems. Once you understand the concepts, it’s very easy to pick up the system that is best for your business and for you. If you don’t understand the concepts, it’s all gobbledegook, probably like everything else is.
We talked about the outside world in terms of business phone systems, so we talked about how calls actually get to your building. So we talked about the North American Dialing Plan which is basically like the routing protocol for the Public Switched Telephone Network, the PSTN.