Installation and Operations Manual
AT&T Proprietary (Internal Use Only)
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6 Device Installation, Discover, Registration and Operation
6.1 915MHz Products
The 915MHz devices feature two-way communication with the DLC. The 915MHz
devices are:
Keypad
Siren
915MHz Repeater
Device Controller (Not Evaluated by UL)
Approximately once every twenty minutes 915MHz devices automatically transmit
supervisory messages to the DLC. These supervisory messages are also known as
heartbeat messages. These supervisory messages communicate the identity of the
device, the status of the device and the battery level, if the device is equipped with a
battery. If the DLC does not receive three consecutive supervisory messages from a
915MHz device, then the device is considered to be offline and an advisory message is
automatically sent to the Central Monitoring Center.
NOTE:
DO NOT connect any 915MHz corded product to an AC power outlet that is
controlled by a switch.
6.1.1 Keypad (915MHz)
The AT&T model number
SW-ATT-PAD2W
wireless keypad allows you to control all
system functions. The keypad also features a built-in sounder that will annunciate during
alarms and troubles. The keypad plays a predefined “chirp” sound when a key is
pressed on the keypad. It will also chirp during certain system functions, such as during
entry/exit delay times. The keypad features are shown in Figure 37. The keypad
annunciates different sounds for fire and intrusion alarms.
