Bobby is right and they are wrong. This is exactly why the RJ31 through RJ38X jack wiring patterns were developed, to allow an alarm system to share a line and control it. It's been that way since 1974.

This is just more ignorance by those who have the power to "know" our job better than we do. They can't comprehend this technology, yet they can tell you "no, you are doing the wrong thing". Seems to be the way of the times these days.


Ed Vaughn, MBSWWYPBX