These have a long, reliable history and their familiarity might appeal to you. They certainly have their good points. Price is one of them: the hardware is usually cheaper as there’s no need for built-in radios and there are fewer ongoing maintenance requirements.
The big disadvantage is the sheer work involved in installing and repairing a wired system. It’s not so bad if you’re building a new facility – you’re less likely to notice a few more workers stretching cables between unbuilt walls.
If you’re trying to put a wired nurse call system into a facility that’s already up and running, then prepare for a world of pain. You’ll need to vacate wards or rooms and clear corridors so workers can dig into walls, lift the floorboards or crawl into the ceiling. There’ll be clouds of dust everywhere, and you’ll definitely need to redecorate afterwards. It’s a messy, lengthy job. The alternative is to hide the cables behind trunking, which still involves some upheaval and isn’t terribly nice to look at.
Once that’s all done, it’s pretty much fixed in place. Changing anything is a big job that brings you straight back to the hassle of vacating rooms and digging into walls. Since call points can only be located at the end of cable termination points, it’s hard to make even minor changes such as altering a room from a single occupancy set-up to a twin.
A wired system is a bit like one of those stately cruise ships that make their way steadily into Sydney Harbour and turn slowly and carefully to dock at Circular Quay. It’s an impressive feat of engineering, it’s safe and reliable, and it does its job well. But it’s not agile or easily adaptable.