... .5, cable zone (normally open, normally closed two types) are free to set to with a variety of wired detectors.6 ... group message can be pre-set alarm center telephone, a group of a telephone call center.12, AC power, phone short ... , especially for garage, warehouse and other areas inaccessible to wired telephone network. Technical parameters1, standby current: 20mA2, supply voltage: 9V-12V3, Working ...