The new GSM900 Alarm and monitoring station has 24 alarm zones and a host of other features and functions to facilitate a fully comprehensive home security package. The alarm system has 16 wireless and 8 hard wired zones of which can all support up to 5 detectors per zone;these zones can alse be further classified into their own alarm status modes. The arming and disarming of the alarm system can be set by the main control keypad, remote control or the automatic timed arming and disarming function with a programmable choice of time delay to allow exit and entry.