Everyone should be aware that no matter what Brinks/ADT, or just about any other big name alarm service told you, the system becomes almost useless without monitoring. They let you think you own it, but it will either be deactivated, or will start beeping in the middle of the night until reset. Brinks units do this when monitoring is cancelled, and there is no way to disable it.
Folks, avoid the house brand hardware from the big name operations like ADT. The hardware is junk, and can only be monitored by them. You are much better off with a name brand like Motorola, and a local independent alarm tech.
By the way, hard line telephone monitoring is so outdated. If you want monitoring, cellular is the way to go.