Check what your techs are doing in the field; bad service can lose you customers.
I was celebrating my first Thanksgiving in the Valley of the Sun, Phoenix. It was a peaceful morning until 8 a.m. when my doorbell rang and there stood a police officer who informed me they'd gotten a call that my alarm was going off.
I didn't hear anything and neither did he. He said they get these false signals sometimes when there's a problem with the phone line.