My advice: Don't. Ever. Do. That. I hate WIN phone systems, especially the 36D model. You have to take the protective cover OFF of the damn thing to pull it off the wall. How retarded is that shit? In doing so, with it still running, you run the risk of becoming the shortest path to ground. Well guess what I did today? That's right, I became the shortest path to ground. I remember moving it off the drywall screw, blacking out ever so slightly, and the next thing I knew I had almost dropped the damn thing but couldn't because of the charge going through me. I mean, I felt like I'd JUST woken up after that experience. I felt like my life just flashed... I've been hit by ringing voltage before, but this was like... 10 times worse. Fucking Damn that hurt like a sonofa... Note to self: NEVER remove a 36D from the wall (when still plugged in and on) by handling the metal frame. If you slip and hit something with a charge. It hurts like a fucker. After I regained my senses and what just happened, I had to put the system back on the screws so I could let go of it. I was standing there to catch my breath, and I could feel my heart beating insanely fast. I know you're going to ask, why didn't you just turn it off? I couldn't. The customer is still using the system, but I had to pull it off the wall so I could install their new system; The ever so awesome, and completely encased IVX 128x E class system. I Heart the ESI.