So if you look in something called an oscilloscope, instead of having sound waves, you have something that looks like this. Basically it turns your voice into ones and zeros at your Business phone systems.
Now this is important when you get to your telephone system. Analog takes your real voice, it’s actually your voice, all the way to Japan. Digital turns your voice into a digital signal and then transmits that and then puts it back together. So what happened in the old days, 20 years ago, for PBXs, telephone manufacturing companies wanted to offer more and more features to the people buying telephone systems. Now the problem was in order to have those features, they couldn’t use the old analog telephone handsets because they were not capable of giving the features. So they started selling digital telephones for digital telephone systems.
So this is where the telephone communicates with the PBX using ones and zeros, so it’s a digital call. As we go into in other classes, this gives a lot more functionality to a telephone.