NEW Leedan / Tektone Ir203e Apartment Station Surface Mount 3 Wire

hey everyone my name is Ryan this is Roger Ambrose owner central vacuum stores and today he's going to help us with a tricky situation that some of our customers find themselves in they have an intercom system but they really don't know anything about it and they're looking to upgrade it or fix it and there's a couple things that we need to know as well Roger is going to help us with today so it looks like we have three different systems here let's start which one of these is going to be the most common and how do we go about identifying it well most of the intercoms that we sell today are replacements for older systems and this is the most common one here this is a new tone 3 wire system and they've used this wire they call it 2 by W 3 and it's a ribbon wire and you can see it kinda looks like a ribbon it's got three conductors in it and this wire goes back to probably the 60s and this