optima xm

After returning from holiday and entering the house, the alarm was making an unusual noise but silenced as normal when I entered the code. However, later on before going out, when I tried to set the alarm nothing happened when I typed in the code. I then noticed that a light is lit up for zone 4...

Hi I'm looking to replace my Optima XM alarm panel with a newer one and have been mapping out the existing wires. Everything maps out good, I can see the tamper circuit in place but I have some shock sensors which seem to be wired to a little black box within the Optima XM which doesn't appear...