This was probably one of the few videos where I was actually yelling at the screen, first that the headsets weren't Bluetooth, then that the device ont he phone was a handset lifter, and then on the inside of the main unit, about all the unpopulated components, because that same PCB is used for both a 4 line and an 8 line expansion card, and the people in that office before only needed a 4 line version.
But Dave came through and figured it out in the end. I think - though he never really corrected the idea that the headsets use BT, even after he pulled up the datasheet for the chip inside which says it's a DECT controller.
Kind of surprised Dave's not come across such equipment. I know not much of his professional career was spent working for big companies that might have all the fancy gadgets, but surely Altium has a halfway decent phone system? I don't mean knowledge of the controller itself, but out at the user interface side, the phones and headsets. Some of my coworkers who spend almost their entire day on the phone have headsets, but they aren't those nice fancy pants Jabra ones. Somewhere I am pretty sure I saved a phone from our old system before we went to a more modern IP telephone solution. I know I saved all of the phone to wall cables I could, because my model railroad control system uses those same 6 wire flat cables our old phone system used. For a small office, our controller was HUGE, so I didn't save that. Probably 10X the physical size of the one in this video, and at our peak we had maybe a dozen and a half extensions. Possibly 2 dozen. Not sire why we had such a monster system - grandioise expansion plans I guess, but we got bought out and as soon as we got linked into the new corporate network, the installed the equipment and replaced all the old phones.