I have to agree with NT. I have a golf course that I have set up leasing a dry pair from Bell. We are sending an alarm signal to the owner's house 1/4 mile down the road. When I ordered it, I had to stress that I needed a dry unenergized pair for this or it wouldn't work for what I was doing. They sent a tech out, did some cross-connecting at 3 road pedestals and it works. The monthly bill lists it as an OPX and the order the tech had also listed it as this.