That looks like an old Ademco system. There will be a main panel somewhere, probably in a closet in a metal box that may or may not be locked. Typically near an outlet with a wall wart power supply.

Get the model numbers from the main panel and the keypad and you should be able to find manuals that will do into detail about all the possible features. These old units required a wired land line for reporting to work, so you might have to get creative for that.