From FB group Bell Telephone …
I agree. The upside of splitting before is that it won’t interrupt the DSL.
The downside is that if there is a failure (loss of continuity or blown fuse) in the splitter, the alarm may never make a call.
Most of the alarm panels we had at the college were for fire. They had *two* RJ-31X jacks, one for the main and one for the backup line. I would consider using the splitter before on the backup, but never on the main line.
If the alarm panel interrupts the DSL, that has an upside, too. It gets more people off their butts to find out what’s wrong, and do *something* about it. And the insurance company may not honor a claim if they find out that the RJ-31X has failed because of improper install’n procedures. Those land sharks will use any means to get out of paying.😣😬
BTW, on occasion an alarm panel would lock up in off hook conditions. The interruption of DSL is a good way to draw attention to this failure.
MODULAR PLUGS & SOLID WIRE
I noticed that there was a modular plug crimped on to solid crossconnect wire. I had intermittent problems with RJ-11 plugs crimped on to solid wire. I found out that the contractor was using plugs made for stranded wire. No wonder!
I bought the plugs made for solid wire. They had a contact that was like a “W” with the points displaced so that they would go around the solid conductor, instead of piercing through a stranded conductor. Piercing a solid conductor causes it to be severed, and it then can become intermittent.
I learned a lot of things, including how *not* to do things from contractors! 😱