I had occasionally been using the TG7F by Telular for fire. Its rated as one of the communication paths for fire as primary or secondary. Unfortunately I have run across a unit that doesn't seem to put enough juice into the dial tone and/or the frequency is off. This means the panel looks for dial tone doesn't see it adequately and has to go through its entire error and anti locking procedure before just trying to dial regardless of line condition. The signal does go out, but it generates a trouble, and of course it takes as much as 3-4 minutes. This is in my opinion a serious problem.
I have sent the bad unit back to Telular, (through the distributor only) and have not gotten it back yet. Its been a while. Of course I had to jump through hoops and play games with Telular before they could ever admit that they might have a bad unit. They tried to blame it on me. On the fire panel (which worked perfectly with a land line) and anything else they could think of before sending me to somebody who to get an RMA only to be told I could not get an RMA, but would have to send the unit back to the distributor. What a pain in the wazoo. I took four phone calls and wasted almost two hours of my time.
Anyway. I am looking for another cellular communicator (if there is one) rated for fire primary or backup. I've got an AHJ breathing down my neck on one site and I'm about ready to tell the customer he will have to order another phone line, refund his money for the cell unit, and just quit using them.
Bob La Londe The Security Consultant