The number 1300 300 782 is Signature/ADT back to base monitoring. It calls one or two times a day and costs you almost $150 a year.
It's a big deal because if you are like me and you move into a house that previously had back to base, the old owners may not have forked out the $130 odd bucks to get the phone line disconnected from the alarm.
My case 4 Years I have been paying for these calls without noticing and now ADT whats me to pay to remove the phone line... I smashed the alarm instead...

This number appears many times on my phone bill and I have not dialled it