M

Media Access Control Address (MAC Address)

This hardware address uniquely identifies each network node. This is not to be confused with an IP address, which is assignable. In the panel Diagnostics function, the MAC address is the panel on-board network hardware address.

Magnetic Contact

A device (sensor) dependent on magnetic force for operation. It consists of two parts: a magnet and a switch.

Management Information Base (MIB)

A database used by SNMP for maintaining the status and control for a network device. Each network device has its own specific MIB. Data within the MIB is used by an SNMP agent as part of a network management application.

Manual Pull Station

Mechanical fire device that allows a person on the scene of a fire emergency to initiate a fire alarm by pulling down a lever.

Manual System

A system where the alarm initiating device is operated manually to transmit or sound an alarm signal.

Manufacturer Authorization

A unique DMP panel programming option that allows the user to create a one-hour window when DMP technical support technicians can contact the panel remotely for diagnostic purposes. DMP technicians can only view the system programming and cannot make any changes.

Materials & Equipment Acceptance (MEA)

An agency in New York City that tests and accepts alarm and other consumer products for use in New York.

Megabits Per Second (Mbps)

See Bits Per Second.

Metal Conduit

Pipe for running electrical wires and cables.

Note: Do not run DMP wires in the same conduit as non-alarm system wires.

Missing

A transmitter that is not communicating or checking in with the panel.

Modem

A device that converts digital data from a computer into analog data, which can then be transmitted over a telephone line. This process is called modulation. It also performs the opposite process, demodulation, which converts incoming analog signals into digital data the computer can understand.

Momentary Contact Switch

A switch that maintains contact only while it is held down, such as a pushbutton device, a toggle switch, a slide switch, or a lever switch.

Monitor

A keypad function that allows users to select individual zones to beep at the keypad when opened. As the zone trips, its programmed name also displays on the keypad for visual identification.

Monitor Point

A contact input to the system that detects activity at some external source, such as a door, smoke detector, or fire alarm.

Monitoring for Integrity

The ability to detect a fault condition in the installation wiring, which would prevent normal fire alarm system operation.

Monitoring Center

The remote monitoring location where personnel observe signals from annunciators and automation software. When an alarm signal is received, the monitoring center personnel inform the proper authorities. This term is preferred over central station. See Central Station.

Monitoring Zone

A continuous loop of wire starting at the control panel and running through switches in a system to indicate a breach of security through an open switch or a cut wire.

Motion Detection System

A system designed to generate an alarm by sensing movements of an intruder within a protected area. Such detection usually is accomplished through ultrasonic, microwave, or passive infrared detectors.

MOV

Metal Oxide Varistor.

Multicasting

Similar to broadcasting but provides a protocol-specific method of identifying network devices. Each protocol has its own multicast address.