Specifications

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report if it has already communicated with the central station receiver within the time period entered
into the test frequency option. See test frequency.
delay reports - a programming option under Events Manager that provides for all non-alarm reports to
be held in the panel's memory until the event buffer is nearly full or until the panel's next
communication with the receiver.
delay zone - see exit zone.
detector - a unit that is installed as a satellite component in a security system designed to detect an
intruder within a protected area.
device - any keypad, expander, or point addressable module that requires an address on the keypad or
LX-Bus.
detector - a device used for detecting an intruder.
device fail output - this programming option provides for the specified output to turn on any time an
addressed device fails to respond to polling from the panel. The output is turned off when all
programmed devices respond to polling.
digital communicator - a means of transmitting alarm signals and other information to a central
station using the customer's existing phone line. To transmit an alarm, the communicator seizes the
customer's phone line and electronically dials the central station receiver. When the receiver answers,
the communicator sends a message in the form of a sequence of tones. A mini-computer in the
receiver accepts and acknowledges the message. It then prints out the information for display to the
operator.
direct wire - a dedicated leased telephone line from subscriber's premises directly to a central station
monitoring point. Line used for alarms only.
disarm - to turn off the burglary protection in an area using a keypad, keyswitch, or remote
programmer.
disarmed rings - the number of rings the panel counts before answering the phone line when any
areas of the system are disarmed.
display events - a user menu option that allows authorized users to view a record of events that
occurred on the system. The panel stores in memory all alarms, troubles, and restorals as well as
other options.
door access - a feature of DMP Security Command keypads or 733 Wiegand Interface Modules that
allow a user to enter their code number and cause an internal Form C relay to activate and release an
electric door strike or magnet. A door access report containing the keypad address and user number
can also be sent to the central station.
dual reporting - a method of sending the same signals to two separate receivers. An example would
be to send alarms and openings/closings to receiver 1 as well as receiver 2.
DTMF (Dual-Tone Multiple-Frequency) - this feature enables touch-tone dialing.
duress - see ambush.
egress - a programming option that allows individual access doors to be assigned to detect anti-
passback violations. See also anti-passback.
entry delay - the length of time programmed into the system during which the user can enter the