Getting Your RJ31 Wiring Right the First Time
If you've ever opened up a security alarm panel and seen a mess of cables, you've likely encountered rj31 wiring without even realizing it. At first glance, it looks like a standard network jack, but it's actually a specialized setup designed to give your alarm system "priority" over your home phone lines. It's one of those clever bits of engineering that solves a very specific problem: making sure an emergency call can get through even if someone left the kitchen phone off the hook. ...