Let's pretend that you're at work and you're on a teleconference call with a bunch of people. Since you're on a conference call, that means that there are folks in different physical locations. It doesn't really matter whether you're in two different rooms in the same building or in two different countries, the important part is that you're not actually in the same room. The other salient point in that first sentence is that it's a "tele"-conference call, meaning that you're mainly relying on the audio, and there may or may not be video. For the sake of argument, let's say it's one of the older pieces of technology that doesn't include video conferencing. So, you now have a situation where you've got at least two physically-separated locations, and you have people on either side who can't actually see each other. This is not an uncommon situation, and there are decent odds that you've been in a situation like thi...