Glossary
4-2 Communication definition - A hexadecimal communication format that allows the panel to send alarm and system reports to non-DMP receivers. The 4-2 format consists of a 4-digit account number, a 2-digit event code, and a 1-digit checksum.
A
"A" Zone (Style D) - a circuit extending from and returning to a fire alarm control device or transmitter to which normally open contacts of alarm actuating devices are connected for the initiation of alarm signals. Routinely referred to as four-wire zone supervised. See "B' zone.
abort - an authorized user of the system manually cancels an alarm after an armed zone has tripped. Used mainly when the zone trip was accidental, such as the opening of an armed door, and a police or fire response is not needed.
abort report - a report sent by the panel following an alarm report to indicate the alarm has been cancelled by an authorized user and no dispatch is required.
access - the ability or opportunity to enter an area or to obtain knowledge of certain information.
access code - a combination of ID numbers related to a defined time segment. These combinations are programmed into an access system to grant or deny access to system users. Also, programmer lockout code is a programming option that allows you to enter a special code into the panel that will then be required to gain access to the panel's internal programmer through the keypad. You can change this code at any time to any combination of numbers form one to five digits long. Once you have changed the code, it is important that you write it down somewhere and store it in a safe place. Lost lockout codes require the panel to be sent back to DMP for repair.
access control - the means of influencing and regulating the flow of people through a door.
access control card - a card containing coded information. It is placed in or near a card reader. The card is read and access is granted if the information from the card is valid for that specific time, day, and location.
access keypads - a programming option that allows door access reports to be sent to a receiver. A report is sent with each door access made from selected keypads. Keypads at addresses not selected still operate the door strike relay but do not send door access reports.
access level - access priorities.
access point - a door, gate, or other barrier through which people or vehicles can gain access to a defined area.
access privileges - controls placed on network services that limit and control user access through doors.
account number - all reporting systems have an account number that identifies them at the central station. The account number is included along with any reports the panel sends to the receiver.
acknowledge - to confirm that a message or signal has been received, such as by the pressing of a button or the selection of a software command.
action - a zone programming option that selects the action of any outputs activated by changes in the zone's condition. The four options are: steady, pulsed (one second on, one second off), momentary (one second on for one time only), and follow (on when the zone is off normal, off when the zone restores).
activity report - a record of openings, closing, alarms, and other signals received from a protected premise and maintained by the central station alarm company.
address - 1. a switch setting on a keypad, zone expander, or other device that reflects its assigned position on a data bus. Zone expanders, for example, are addressed so that the panel is able to associate its onboard zones with their programmed location and characteristics held in memory. 2. A sequence of bits used to identify devices on a network. Each network device must have a unique address. Addresses fall in two categories: physical hardware addresses and logical protocol addresses.
addressable device - an alarm system component with discrete identification that can have its status individually identified or that is used to individually control other functions.
adverse condition - any condition occurring in a communications or transmission channel that interferes with the proper transmission or interpretation, or both, of status change signals at the supervising station.
alarm - a condition in which one or more armed zones in the system have been faulted. Almost all alarms sound some form of audible device locally except in the cases of silent panic or ambush alarms.
alarm bell - a bell or siren installed on the protected premises that gives indication of an alarm condition to persons inside or nearby.
alarm control - a device that permits an alarm system to be turned on and off and provides electrical power to operate the system. Every alarm system must have an alarm control.
alarm initiating device - a device which, when actuated, initiates an alarm. Such devices, depending on their type, can be operated manually or actuated automatically in response to smoke, flame, heat, or water flow.
alarm module - an add-on device to monitor a series of sensors and initiate warning devices if required.
alarm panel - the main controlling CPU in the alarm system to which all zones, phone lines, and devices are connected.
alarm receiver - a receiver that is designed with the main purpose of receiving alarm events. Receivers are usually located and maintained at a central station company.
alarm signal - an alarm signal lets people know the alarm system has activated. The alarm signal may be a bell, siren, or visual device (local alarm), or it may be a message transmitted to a central station alarm company on leased telephone lines or the switched network. Every alarm system must have an alarm signal.
alarm silence - a keypad menu function that allows authorized users to silence alarm bells or sirens during an alarm condition on the system. Users can also enter their user code and press the command key directly from the status list. This is an exclusive function of DMP panels that allows silence of alarm bells without disarming the system.
alarm system - a combination of compatible initiating devices, control panels, and notification appliances designed and installed to produce an alarm signal in the event of emergencies.
all/perimeter - a panel mode of operation that provides for the system to be configured into just two areas: a perimeter and an interior. Exterior doors and windows are assigned to the perimeter while inside PIRs, doors, or pressure mats are assigned to the interior area.
alphanumeric - term used to describe letters and numbers together.
ambush - a silent, invisible alarm signal sent to the central station that indicates a user is being forced to disarm the system. The ambush code is sent when ambushed is programmed as YES in the panel and a code for user number one is entered at the keypad. DMP panels use a unique ambush code number to prevent false alarms.
ambush code - a special code entered into a digital keypad to indicate a duress condition that directly threatens the user. This code does not activate signaling devices at the premises.
ambush output - a panel output that is programmed to activate any time an ambush code is entered at a keypad. The output is turned off using the sensor reset option from the user menu. This output is used to lock down areas or activate strobes, etc.
American National Standards Institute (ANSI) - a federation of trade, technical, professional organizations, government agencies, and consumer groups that coordinates standards development, publishes standards, and operates a voluntary certification program.
American Standard Code for Information Interchange (ASCII) - a commonly used coding scheme that uses eight bits of data to encode alphanumeric and special control characters. Common to most computer platforms.
analog - a method of data transmission where the data is continually modulated to represent transmitted information.
annunciator - a keypad or other lighted or audible display at the protected premise that indicates the condition of the system, zones, and armed status.
anti-passback - a programming option that requires a user to properly exit (egress) an area they have previously accessed. If they fail to exit through the proper card reader location they will not be granted access on their next attempt. Also, see egress.
any bypass - a panel programming feature that allows low level users to bypass zones during the arming sequence without having to enter a higher level user code.
area - part of a protected premise that is programmed to operate separately from the other areas. Areas can have their own keypads, zones, account numbers, and arming and disarming schedules.
area arming - a panel mode of operation that provides for one or more areas to be individually armed and disarmed.
area schedules - a programming option that allows you to automatically arm and disarm areas within a system. This is done by entering schedules in the panel programming.
arm - to turn on the burglary or other non-24-hour hour protection in a protected premises.
armed - a condition in which a zone or system can be placed. When a zone is armed, a change in its normal state causes the panel to activate an alarm. Fire, panic, and other 24-hour zones are considered always armed.
armed output - a programming option that allows an output to be controlled by the arming cycle of an area.
armed rings - the number of rings the panel counts before answering the phone line when all areas of the system are armed.
arming zone - a DMP zone type that allows you to use keyswitches to arm and disarm areas within a system. This is done by entering the area number(s) to be controlled into the area section of the arming zone programming.
asynchronous communication - a technique of data transmission that sends one character at a time without waiting for an acknowledgement.
authority level - a level of access to the system and its functions that is assigned to each user code. Each area must have at least one user with a master authority in order to be able to add, change, or delete other users.
auto arm - to automatically turn on the burglary protection in one or more areas through the use of schedules. These schedules allow you to set the time of day for the arming to occur. If using the automatic arming feature along with the closing check (see closing check), the arming does not take place until the expiration of a tenminute closing check delay. If the area has been disarmed outside of any schedule, the closing check sequence occurs one hour after the area is disarmed. At arming, bad zones are handled according to the bypass option selected. If a closing report is sent to the central station, the user number is indicated as SCH (for schedule) on the receiver.
auto disarm - to automatically turn off the burglary protection in one or more areas through the use of schedules. These schedules allow you to set the time of day for the disarming to occur. If an opening report is sent to the central station at disarming, the user number is indicated as SCH (for schedule) on the receiver.
automatic recall test - a signal generated by the panel that is sent to the central station. This signal indicates that the panel communicator is working properly and is able to send signals to the central station receiver.
automation software - central station software that receives signals from an alarm receiver and displays alarms on a display screen to allow dispatching of the proper authorities.
away - a panel arming mode in which all areas of the system are armed. This option is for when the user is leaving the premises and no person is left inside.
B
"B" Zone (Style A) - a circuit extending from a fire alarm control device or transmitter to which initiating or notification devices are connected. The zone is terminated with an end-of-line supervision resistor.
backup - as used in programming for receiver one and receiver two reporting, choosing YES for this option means that the receiver will be contacted by the panel in the event the primary receiver cannot be reached.
Bank, Safe, and Vault - an area operating characteristic that prevents disarming, schedule changes, and time/ date changes during armed periods. This feature is typically used on bank vaults, but can also be used for restricted access storage, gun rooms, or other areas for which the user wants an extra level of protection.
bell - alarm bell - a bell or siren installed on the protected premises that gives indication of an alarm condition to persons inside or nearby.
bell action - a zone programming option that defines the action of the alarm bell output for alarms on that zone.
none: no bell action for an alarm condition on the zone.
pulsed: a repeating one second on, one second off bell output for the duration of the programmed bell cutoff time.
steady: a steady, uninterrupted bell output for the duration of the programmed bell cutoff time.
temporal code: a repeating 0.5 second on, 0.5 second off (three times) followed by 2.5 seconds off. This lasts for the duration of the programmed bell cutoff time.
bell cutoff - the length of time the alarm bell or siren is programmed to ring after an alarm. DMP panels allow a programmable length of time in one-minute increments. Entering a zero allows the bell output to run continuously. AHJ requirements for bell cutoff can vary but it is typically between five and 15 minutes.
bits per second (bps) - a unit that measures the message carrying ability of a medium. A kilobit per second (Kbps) is one thousand bits per second. A megabit per second (Mbps) is one million bits per second.
burglar alarm system - an alarm system for detecting a burglary.
burglary output - a panel output that is activated any time a specified burglary type zone is placed into alarm. The output is turned off when the user disarms the area in which the alarm occurred.
bypass - a manual shunting of a zone by a user that allows the panel to ignore any activity on the zone until it is reset back into the system. A user can bypass a zone at any time from the user menu or while arming the system if they cannot restore it to normal. Used when a user wants to keep a door or window open or when a device is in need of service. See also swinger bypass.
bypass reports - a programming option that allows zone bypasses, resets, and force arm reports to be sent to a receiver.
C
cancel - see abort and abort report.
cellular - a communication programming option that enables cellular transmissions with Cell-Miser™ call restrictions.
Cell-Miser™ - when Cell-Miser™ is selected in programming the panel restricts its cellular calls to zone alarms, ambush, line one trouble, abort, and recall test reports. Additionally, delayed event reports can also be sent but only if the original cellular call was made to transmit one of the previously listed reports. Line 1 trouble is sent only once during each armed period.
central station - a supervising station that is listed for central station service.
certification - a systematic program using randomly selected follow-up inspections of the certificated systems installed under the program, which allows the listing organization to verify that a fire alarm system complies with all requirements of this code. A system installed under such a program is identified by the issuance of a certificated system.
chime - a single-stroke or vibrating type audible notification appliance, which has a xylophone-type striking, bar, and/or tone.
Class A Circuit (Zone) - NFPA Style D - an arrangement of a supervised initiating or signaling line or indicating circuit that allows the operation of the circuit despite the occurrence of a single open or ground condition. A requirement of fire protection systems that requires alarm operation even when a single break or a single ground faults exists on the circuit.
Class B Circuit (Zone) - NFPA Style A - an arrangement of a supervised initiation or signaling line or indicating circuit that doesn't allow automatic circuit conditioning to operate during a single open or a single ground condition.
client - a process (program or routine) or entity (person, LAN) that employs the services of servers.
client/server - the interaction of software processes that function in a cooperative manner. Clients make requests of servers.
closed circuit system - a switch or other detector used in closed circuit alarm systems that is closed prior to alarm and opens on alarm.
closing check - this programming option enables the panel to verify that all areas in a partition that has been armed after primary/secondary or permanent/temporary schedules have expired. If the closing check finds any areas disarmed past the scheduled time, the keypad selected to display system trouble status emits a steady beep and displays CLOSING TIME! If you also select area schedules, the appropriate area name is displayed followed by - LATE. The keypad's steady beep is silenced by pressing any top row select key. If the system is not armed or a temporary schedule not extended within ten minutes, a no closing report is sent to the central station receiver. If the area has been disarmed outside of any schedule, the closing check sequence occurs one hour after the area was disarmed.
closing code - this programming option provides for a user code to be required for system arming.
closing wait - a programming option that provides for the panel to display a message on the keypad and delay arming the system until the closing report has been acknowledged by the central station receiver.
code change reports - a programming option that allows code additions, changes, and deletions to be sent to a receiver.
coded - an audible or visible signal conveying several discrete bits or units of information. Notification signal examples are numbered strokes of an impact-type appliance and numbered flashes of a visible appliance.
collision - the condition that results when two network devices transmit at nearly the same time. The transmissions collide, making the data unusable.
command key - the command key is used to step ahead through options in the panel's programmer or user menu. Pressing the command key allows you to go forward and through each step of a menu section. As you go through the options, the keypad displays any current selections already stored in the panel's memory. The command key is also used to enter information into the panel's memory, such as phone numbers or zone names, by pressing the key after entering the information and it is being displayed correctly on the keypad.
Command Processor™ - the trademarked name for DMP control/communicator alarm panels.
common area - a unique DMP programming option that allows specification of one or more areas within a partition to arm automatically when all other areas are armed. Alternately, common areas disarm when any area in the same partition is disarmed. Common areas are ideal for lobbies, storage rooms, or other areas shared by multiple users.
communication port (COM port) - a serial port on a computer designed for communicating. DMP uses this port to connect to a receiver or direct connect to a panel.
communication type - a programming option that specifies the communication method the panel uses to report events to DMP receivers or non-DMP receivers. Note: All formats are not available for all panels. Consult a programming manual for availability.
DD - Digital Dialer communication to DMP receivers.
MPX - Multiplex communication format to DMP receivers.
M2E - Radionics Modem IIe communication format to non-DMP receivers.
CID - Ademco Contact ID communication format to non-DMP receivers.
4-2 - A hexadecimal communication format to non-DMP receivers.
HST - Asynchronous communication transmitted over a network to an SCS-1R receiver.
Contact ID (CID) - a panel-reporting format developed by Ademco that allows panels to send reports to a receiver in DTMF format. A Contact ID report is made up of 18 DTMF digits.
cross zone time - the amount of time programmed into the panel during which armed cross zoned zones must trip before an alarm report is sent to the central station. Cross zone time can be from four to 250 seconds.
cross zoning - a zone characteristic that requires the zone to trip twice, or a second cross zoned zone to trip, within a programmed amount of time before an alarm report is sent to the central station. An example of cross zoning would be two interior PIRs. One PIR might trip due to an environmental occurrence but an alarm report would not be sent until the other PIR is also tripped or the first PIR restores and then trips again. If neither zone trips before the programmed cross zone time expires, only a zone fault report is sent to the central station. Cross zoning reduces false alarms by requiring two zone trips to send an alarm report.
cutoff output - a panel programming option that allows you to specify individual onboard outputs to turn off after a programmed time period. See cutoff time.
cutoff time - a programming option used with cutoff outputs that specifies how long a selected output remains activated. The programmable range is in one-minute increments.
D
data - information represented in digital form, including voice, text, facsimile, and video
day zone - a zone type that buzzes the keypad and provides a trouble report to the central station if the zone is tripped while its area is disarmed and an alarm if the zone is tripped while the area is armed. This is typically used with window foil, emergency zones, or other types of protection that needs constant supervision but not always an alarm. The keypad buzzer initiated by a day zone can be silenced by pressing any top row select key.
DD (digital dialer) - a programming option for the panel to use standard digital dialer communication to a DMP receiver. DD is a DMP proprietary format using SDLC protocol.
DDMX - a communication option in the 1912XR Command Processor panel that can allow the panel to communicate to the central station as a digital dialer during disarmed periods but then switch automatically to multiplex communication when the last area in the system is armed.
defer test time - a programming option that allows the panel to defer sending in a scheduled test 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.
E
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 premises through an exit zone (usually a front door) and disarm the system.
entry output - a specified output on a panel that is turned on at the start of the entry delay time. The output is turned off when the area is disarmed or the entry delay time expires.
entry zone - a zone type usually assigned to a perimeter door that allows the user a short amount of time to enter and exit while the system is armed without setting off an alarm.
Ethernet - a LAN cabling system originally developed by Xerox, Intel, and Digital. Ethernet has a bandwidth of 10 Mbps and uses the CSMA/CD access method.
events - system activity that generates messages to the reporting device
events manager - a programming option that specifies when non-alarm reports are sent to the receiver. Selecting this option does not affect zone alarm, zone trouble, zone restoral, supervisory, or serviceman reports. Closing reports are not delayed if the closing wait option is enabled.
exit alarm - an alarm that occurs when a zone is still bad at the end of the exit delay time. This usually occurs when the door through which the user exited does not close all the way before the programmed exit time expired.
exit delay time - the length of time programmed into the system during which the user can exit the premises through an exit zone (usually a front door) and disarm the system.
exit output - a specified output on a panel that is turned on any time an exit delay time starts in any area of the system. The output is turned off when the exit delay time expires or when the arming has been stopped.
exit zone - a zone type usually assigned to a perimeter door that allows users a programmable amount of time to enter and exit while the system is armed without setting off an alarm.
F
factory defaults - this function of the panel's programmer allows you to quickly turn programming parameters back to their factory default setting.
false alarm - an alarm signal initiated without the presence of an emergency. This term is generally used to describe an unwanted alarm condition. A false alarm report is sent by the panel due to a user error, environmental activation, or malfunction of a security device installed in the system. False alarms can be controlled by thoroughly training all users and ensuring that equipment is installed according to the manufacturer's recommendations.
fault - a report that is sent to the central station receiver whenever a fire verify or cross zoned zone is tripped once but does not trip a second time to cause an alarm.
fire alarm output - a specified output on a panel that is turned on any time a fire type zone is placed into an alarm condition. The output is turned off using the sensor reset option in the user menu while no additional fire type zones are in alarm.
fire trouble output - a specified output on a panel that is turned on any time a fire type zone is placed into a trouble condition or when a supervisory type zone is placed into an alarm or trouble condition. The output is turned off when all fire and supervisory type zones are restored to normal.
fire verification - typically used on smoke detector zones to provide a reset of the panel's switched auxiliary power or power supply (from where the smoke detectors are powered) and a delayed length of time during which the detector must trip again before an alarm is initiated.
fire verify - a zone type typically used with smoke detectors that provides a reset, after a fire alarm, of the panel's switched auxiliary power and 2-wire smoke detector zones and a delayed length of time during which the detector must trip again before an alarm is initiated.
flow control - the process of adjusting the flow of data from one device to another to ensure that the receiving device can handle all of the incoming data. This is particularly important where the sending device is capable of sending data much faster than the receiving device can receive it.
force arm - this arming option allows the panel to force arm the system and ignore all bad zones. Zones force armed in a bad condition are capable of restoring and reporting an alarm if tripped. A report of the force armed zones is sent to the central station receiver if the bypass reports option has been programmed as YES.
Form "A" Contacts - single-throw contacts that are normally open. See open circuit.
Form "B" Contacts - single-throw contacts that are normally closed. See closed circuit.
Form "C" Contacts - a dry contact, single-pole double-throw (SPDT) relay that provides one common, one normally open, and one normally closed connection. When activated, the normally open side is shorted to the common while the normally closed is opened.
4-2 Communication - a hexadecimal communication format that allows the DMP panel to send alarm and system reports to non-DMP receivers. The 4-2 format consists of a 4-digit account number, a 2-digit event code, and a 1-digit checksum.
4-Wire Bus Trouble - a keypad message indicating trouble on the keypad bus. This message is generated when one of the following conditions occur:
Two Supervised devices on the keypad bus are set to the same address.
No supervised devices on the keypad bus.
Low data voltage on the yellow wire of the keypad bus.
fully armed - a condition on the system where all areas are in an armed state.
fully supervised zone - a zone in which the contact will activate an alarm in the event any disturbance occurs.
G
general alarm - a term usually applied to the simultaneous operation of all the audible and visible alarm notification appliances on a system to indicate the need for evacuation of a building.
glassbreak detector - a device attached to a glass surface or a window frame that senses an attack on that surface.
H
hardware address - the unique physical address deter'mined at the physical and data link layers. For example, each Ethernet card has a unique hardware address that is stored within the card.
holdup alarm - an alarm initiated by a mechanical panic button or software panic on a keypad in response to a robbery or assault.
home - a condition of the system where perimeter devices only are placed into an armed state allowing the user to move freely about the inside.
Home/Sleep/Away - this system option provides users with perimeter, interior, and bedroom areas that they can selectively arm from the keypad for maximum security. Selecting Away arms all areas of the system. Selecting Home arms only the perimeter protection of the system. Selecting Sleep arms the perimeter and interior areas, but leave devices near bedrooms and other nighttime areas off.
host - asynchronous communication over digital data networks.
host check-in - a programmable time period that specifies the delay, in minutes, the panel waits to send its next check-in report. Since host communication is not a polled method, the check-in time allows the SCS-1R Receiver to get a check-in report (s70) periodically to verify the communication link with the panel.
I
ingress (entrance) device - a device sensor configured to control access into an access-controlled area.
initialize - the initialization function of the panel's programmer allows the clearing of selected parts of the panel's program to default or blank settings. Initialization can include clear all codes, clear all schedules, clear display events memory, clear zone information, clear area information, clear communication and remote options, and a set to factory default options.
initiating device - any manually or automatically operated equipment that, when activated, initiates an alarm through an alarm signaling device.
instant alarm - see night zone.
Integrated Services Digital Network (ISDN) - a digital communications standard that integrates voice and data.
K
Kbps - kilobits per second. See bits per second.
keep - a programming option under Events Manager that provides for all non-alarm reports to be held in the panel's memory buffer until they're overwritten by new stored activity. You can view the contents of the memory buffer using the Remote Link software program or the display events feature in the user menu.
keypad - a device with a keyboard and display that allows users to enter codes, arm and disarm areas, view current and past events, and perform system functions such as silencing alarm bells and changing user codes. Keypads can have LED, LCD alphanumeric, or vacuum fluorescent alphanumeric displays.
keypad alarm control - a burglar alarm control that is turned on and off by entering a numeric code into a digital keypad. Signals can be sent when the control is turned on and off so that the central station alarm company can supervise openings and closings.
L
late to close output - a specified output on a panel that is turned on any time a programmed area remains disarmed past the scheduled closing period. The output is turned off when the area is armed, the closing schedule is extended, or the schedule is changed.
line security - the degree of protection of the signaling system that connects the subscriber's system to the central station alarm company. Two levels of line security-standard and encrypted-are recognized by UL.
line supervision - the electrical supervision of a wire run to detect tampering (a cut or shorted wire). Line supervision usually requires a terminating element at the end of the monitored wire zone.
local alarm - a visual or audible signaling device located at the premises.
Local Area Network (LAN) - a network in one area, such as a building or group of buildings.
local printer - a serial printer that can be connected to certain DMP Command Processor panels to provide a printout of system events. This feature can allow business owners to track activity of employees, check system arming and disarming times, or monitor other events of their security or fire system.
local system - an alarm system that rings a local sounding device in the event of an intrusion.
loop - see zone.
LX-Bus™ - a DMP 4-wire data bus onto which you can connect addressable zone and output expanders.
M
manufacturer authorization - a unique DMP panel programming option that allows you to create a one hour window during which 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.
mode - a programming option that allows you to select Area, All/Perimeter, or Home/Away arming modes for the panel's areas. Area arming mode allows areas to arm independently of each other as separate systems. All/ Perimeter mode provides a perimeter and interior area as one account. Home/Sleep/Away mode provides a perimeter, interior, and, in some cases, bedrooms area as one account.
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.
multiplex - a communication method DMP panels use that keeps the panel in contact with the SCS-1 Receiver. Alarm and system information are transmitted quickly as the panel does not need to dial a phone number or wait to be acknowledged by the receiver. Each multiplex panel is sequentially polled by the SCS-1 Receiver to maintain constant supervision.
multiplexer - a network component that combines multiple data signals onto one path.
N
network interface controller - a networking card, such as Ethernet, Token Ring, or FDDI, for a computer.
network server - A computer or device on a network that manages network resources. For example, a network server is a computer that manages network traffic.
night zone - a zone type that provides an instant alarm when tripped while armed and no alarm when tripped while disarmed.
non-polled address - a keypad message indicating that the device is set to an unavailable address or that the device has not been turned on in device setup.
notification zone - an area covered by notification appliances that are activated simultaneously.
O
open circuit - a condition in which no electrical continuity exists in a circuit of conductor. In an open circuit protective zone, the detector contacts are open when the detector is in a quiescent state and closed in alarm.
openings and closings - a prearranged schedule between the alarm subscriber and central station alarm company for turning the system on and off. The central station records this event. The central station knows when a system has been left off inadvertently.
opening report - a report sent to the central station at the time a system is disarmed showing who disarmed it, what area was entered, and the current time and date. This information is often of interest to the customer for tracking employee activity.
option - a user selectable function that can be accessed from the keypad's user menu.
output - any type of notice or action that a panel will initiate when a sensor connected to that panel is triggered.
output action - a zone programming option that defines the action of an output assigned to a zone.
steady: the output is turned on and remains on until the area is disarmed, an output cutoff time expires, or the output is reset from the keypad user menu.
pulse: the output alternates one second on/one second off.
momentary: the output turns on only once for one second.
follow: the output turns on and remains on while the zone is in an off normal, or bad condition.
output cutoff time - a programming option that allows you to specify a cutoff time for the panel's outputs. If the output is turned off by the user, or by an event restoral, the cutoff time is reset and starts over at the next occurrence.
output schedules - panel schedules that allow you to set automatic on and off times for the relay outputs on DMP panels. Output schedules can be used to turn on exterior lights, HVAC systems, CCTV cameras, or any other contact activated devices. Outputs controlled by schedules can also be manually turned on or off by users with the proper authority level.
P
packet - an organized sequence of binary data that includes data and control structures.
Pager Direct™ - a reporting capability that allows a pager to receive system reports directly from the panel.
pager identification number - a programming option that allows the panel to first send a unique pager ID number prior to sending actual pager messages containing system reports.
pager reporting - a programming option that allows the panel to send alarm, trouble, opening, closing, and late to close reports to a pager.
panic - a special silent or audible alarm initiated by a user that alerts the central station to an urgent situation.
parallel - a transmission format that can send multiple bits of data at the same time. This method connects an electrical circuit whereby each element is connected across the other. The addition of all currents through each element equals the total current of the circuit.
partial arming - a condition on the system where some, but not all, areas are in an armed state.
partition - a group of one or more areas that collectively operate as a multi-area panel or partition. Each partition in a panel contains areas. An area can be an office in a building or a section of a house such as the garage. Users who operate an area in one partition cannot view areas in another partition through the same keypad. Some lesser manufacturers that do not have partition capability refer to their areas as partitions.
pass-through - the ability to gain access to one network element through another.
perimeter - the portion of a protected area or building that includes doors, windows, and other accessible openings.
perimeter arming - an arming option that allows the user to turn on only the perimeter portion of their protection. Perimeter arming allows unrestricted movements within the interior of the protected areas by leaving the interior devices disarmed.
permanent schedules - programmable schedules intended for such applications as late to close annunciation and auto arming. Permanent schedules can also be programmed to restrict codes that have certain authority levels to disarming the system only during selected times.
phone trouble output - an output that turns on any time the phone line monitor detects a voltage below 3 VDC. The output is turned off when the phone voltage rises above 3 VDC.
Port - an electrical point of entry, usually on a router, to a computer, network, or other electronic device. A router can have many ports.
Post Indicator Valve (PIV) - a cast metal post over the stem of an underground gate valve supplying water to a sprinkler system. On each side of the PIV are rectangular windows through which you can view a plate showing whether the valve is open or shut.
power fail delay - a programming option that tracks the duration of an AC power failure. When the AC power is off for the length of the programmed delay, an AC power failure report is sent to the receiver.
premises - the building or home being monitored by the security or fire system.
primary schedules - programmable schedules intended for such applications as late to close annunciation and auto arming. Primary schedules can also be programmed to restrict codes that have certain authority levels to disarming the system only during selected times.
printer - see local printer.
printer reports - a programming option that allows the definition of events that are sent to a local printer.
priority zone type - a programming option that provides for a zone to be in a normal condition before its assigned area can be armed. Priority zones cannot be bypassed or force armed.
programmer lockout code - this programming option allows you to enter an access code into the panel that will then be required to gain access to the panel's internal programmer through the keypad. You can change this code at any time to any combination of numbers form one to five digits long. Once you have changed the code, it is important that it is documented and stored in a safe place. Lost lockout codes require the panel to be sent back to DMP for repair.
programmer lockout code restrictions - you cannot set a lockout code higher than 65,535 or use the codes 6653, 2313, or any three-digit code that begins with 98. These codes are reserved by the panel for various functions.
protected premises - refers to the establishment in which an alarm system is installed
R
ready output - a specified output that is turned on whenever all disarmed burglary zone types are in a normal condition. The output is turned off when any disarmed burglary zone is placed into a bad condition.
receiver - a communication device that relays data from a panel to software installed on a computer.
receiver key - an eight-digit code that is programmed into Remote Link and embedded into the receiver. The panel requests this key the first time it is contacted by the receiver. The panel retains the receiver key in its memory and accepts commands only from a receiver with a matching key.
relay - an electrically activated device that provides an opening or closing across two points for the purpose of switching the control voltage of lights, annunciators, bells, or other devices.
remote key - a one to eight digit code entered into the panel's program that is used to verify the authority of the person or company, receiver or computer contacting it.
remote phone number - a phone number the panel dials after a remote programming attempt is made. Once the initial attempt has been made, the panel hangs up the phone line and dials the remote phone number.
repeater - a network device that repeats the signals on a network. Repeaters operate as the physical layer of the OSI Reference Model. Repeaters amplify weak signals from one segment and repeat them on another segment.
report - a signal or message sent by the panel to the central station receiver in response to activity within an area, a programmed occurrence (such as a timer test), or a change in the system's status.
reset - a report sent to the central station receiver in response to the resetting of a bypassed zone.
reset jumper - the two reset pins on a DMP Command Processor panel used to reset the panel prior to programming.
reset panel - a keypad display that instructs the technician to reset the panel using its onboard reset jumper before programming access can be granted.
reset swinger bypass - a programming option allowing a zone that has been swinger bypassed to reset back into the system if it has been in a normal condition for one complete hour after being bypassed.
restoral - a report sent to the central station receiver in response to the restoring to normal of an alarmed or troubled zone.
restoral report options - this programming option allows you to select whether a restoral report is sent and when.
no: disables the restoral report option for the specified zone. The zone continues to operate but does not send a restoral report to the central station receiver.
yes: enables a zone restoral to be sent to the receiver whenever the zone restores to normal from a bad condition.
disarm: zone restorals generated during the area's armed period are held in the panel's memory until the area is disarmed. At that time, the zone restoral report is sent to the receiver.
retard delay - a programmable zone characteristic that provides for a delayed period before a short on the zone is accepted as an alarm. This feature is often used when the zone is connected to a waterflow switch to allow for fluctuations in water pressure.
RJ11 jack - a four conductor phone connector used to connect standard telephones to a phone network.
RJ31X/RJ38X jack - an eight conductor phone jack used to connect burglar and fire alarm systems to a phone network. The only difference between the two jack types is a jumper installed across terminals two and seven on the RJ38X to allow for phone cord supervision. Two phone lines are required for commercial fire systems.
RJ45 - network connection.
router - a network device that connects networks by maintaining logical protocol information for each network.
Routing Information Protocol (RIP) - a protocol used to update routing tables on TCP/IP networks.
RS-232 - a standard defining interface voltage and current levels and other signal characteristics used to couple digital equipment to a transmission link. This is the standard DMP uses for direct connecting to a computer or local printer.
S
schedule change reports - a programming option that allows schedule changes to be sent to a receiver.
schedules - a feature that allows you to program various panel functions to occur at predetermined times. One use of schedules is for turning relay outputs on or off at certain times of the day or week. Schedules are also used to assign times for automatic arming to occur.
second line - a programming option that allows you to use a second phone line to send reports to the central station receiver should the first phone line fail.
secondary schedules - programmable schedules in panels for use in such applications as late to close annunciation and auto arming. You can also program secondary schedules to restrict codes that have certain authority levels to disarming the system only during selected times.
security code - see user code.
Security Command® - the registered trademark name of the DMP keypad.
serial - a transmission format that sends data one bit at a time and is more widely used than parallel.
server - a network device or process that provides a service to networked clients. Two examples would be file servers or print servers.
service receiver - a receiver that is designed with the main purpose of performing service to panels from a remote location, such as changing programming or viewing events.
silent alarm - an alarm that does not sound a local bell when activated, but which signals a remote monitoring station.
Simple Network Management Protocol (SNMP) - a management protocol used to maintain and query network components. SNMP uses agents on managed nodes to maintain a database known as a Management Information Base (MIB). The data stored within the MIB can be transmitted to the management software on request.
siren - see alarm bell.
sleep - a panel arming mode that arms the perimeter and interior areas, but leaves devices near bedrooms and other night time areas disarmed.
smoke detector - a device that detects the visible or invisible particles of combustion.
split reporting - a method of sending different signals to two separate receivers. An example would be to send alarms to receiver one and openings/closings to receiver two.
status list - displays any alarm or trouble condition on a zone, and any trouble condition on an internal system monitor. If more than one alarm or trouble condition occurs at the same time, the keypad sequences this information on its display.
strike time - the length of time that a keypad relay or an access control device relay will be activated.
supervised alarm service - a central station monitored alarm system that reports opening, closing, and other activities. Supervision assures that the system is turned on and off and that only authorized personnel can gain access to protected premises.
supervised circuit - a circuit in which a break or ground in the wiring which prevents the transmission of an alarm signal, will actuate a trouble signal.
supervision - the ability to detect a fault condition in the installation wiring that would prevent normal operation of the alarm system.
supervisory signal - a signal indicating the need for action in connection with the supervision of guard tours, automatic sprinkler, or other extinguishing systems or equipment, or the maintenance features of other protective systems.
supervisory zone - a 24 hour zone type typically used for supervising fire alarm valve tamper switches on OS&Ys, butterfly valves, and PIVs.
swinger - a zone that intermittently trips while armed resulting in erroneous alarm activation. Swingers can be due to light or heat fluctuations near motion detectors or loose or partially broken wires on a zone.
swinger bypass - a programmable function that allows the panel to bypass a zone that repeatedly trips. Swingers (zones that trip often) are a serious false alarm problem but can be controlled by using the swinger bypass feature. A swinger bypassed zone may be restored to the system after it has remained stable for one hour.
swinger bypass trips - the number of times a zone can go into an alarm or trouble condition within one hour before being automatically bypassed.
Synchronous Data Link Control (SDLC) - a data link layer protocol used by IBM SNA networks and DMP Command Processor panels.
system monitor - the function that allows the panel to monitor its AC power, battery power, enclosure tamper, phone line one, and phone line two. Troubles with any of these elements can be reported to a central station or displayed on the system's keypads.
Systems Network Architecture (SNA) - a suite of communications protocols developed by IBM. It is similar to the AppleTalk protocol suite for the Macintosh.
T
T1 - AT&T term for a digital carrier facility used to transmit a DS-1 formatted digital signal at 1.544 Mbps.
Telco - an alternate term used for a telephone company.
temporary schedules - a programmable schedule that allows the user to give restricted, short term access to another person. Temporary schedules can be used to create a window outside of normal business hours during which a maintenance or deliveryman can enter using a special code that functions only during this window.
test frequency - a programming option that allows the selection of the how often the automatic recall test is sent to the central station receiver.
test report - see automatic recall test.
test time - the time of day the panel sends the test report to the receiver.
thickwire - a type of Ethernet cabling, also known as 10Base-5, that uses a thick (about 3/8") coaxial cable. Primarily used as a backbone to which thinwire or twisted pair hubs are connected.
transceiver - a single-ended electrical installation consisting of both transmitter and receiver. It transmits a beam that is then reflected back to the receiver in the same unit.
transient - any increase or decrease in the excursion of voltage, current, power, heat, and so forth, above or below a nominal value that is not normal to the source.
transmit delay - a feature of DMP Command Processor panels that delays the sending of burglary alarm reports to the receiver for a selectable length of time up to 60 seconds.
transmitter - in a fire or security system, a device that sends alarm signals from a protected premises to a proprietary headquarters, a central station, or a municipal headquarters.
trouble - an off normal condition on a zone during a supervised state. A normally closed zone that alarms when opened, can initiate a trouble when shorted. A fire zone that alarms when shorted can initiate a trouble when opened.
trouble signal - a signal that indicates trouble of any kind. This can be circuit break or ground occurring in an alarm system's devices or wiring.
24-hour zone - a zone that is not turned on or off by arming or disarming a system.
U
Underwriters Laboratories, Inc. (UL) - an agency that tests and lists various consumer products for safety and reliability. Most alarm system products are UL listed for use in various applications.
UL Certificate - a certificate issued by Underwriters Laboratories Inc. that serves as evidence that an alarm system meets UL requirements for installation, operation and maintenance.
user - a person authorized to operate all or part of the security or fire system.
user code - a one to five digit number programmed into the panel and assigned to a user that allows them to access its functions. User codes are typically assigned authority levels that restrict the user to one or more of the system's functions or to certain areas for arming and disarming or door access.
user error - the number one cause of false alarms. A user who does not know how to perform a function for which they have access, or who has not been trained properly in the operation of the system, can and will cause false alarms. It is important that all new users receive instruction on arming/disarming routines and alarm cancellation procedures to lessen the incidence of false alarms.
user menu - a keypad feature that provides a list of optional functions a user can access. These functions include sensor reset, door access, outputs on/off, system status, and user codes. Individual user menu items are displayed to persons according to the authority level of the user code they entered to get into the menu.
V
volt/amp (VA) rating - the products of rated input voltage multiplied by the rated current. This establishes the apparent energy available to accomplish work.
W
Wide Area Network (WAN) - a network that spans distances beyond the range served by LANs. WAN distances are usually measured in miles instead of feet.
wideband - a system in which multiple channels access a medium (usually coaxial cable) that has a large bandwidth, greater than that of a voice-grade channel.
wireless - the use of radio transmitters to send alarm device information through the protected premises to a wireless receiver connected to a DMP Command Processor panel.
Z
zone - a separate circuit or branch of a security system usually for the purpose of isolating and/or identifying alarms or trouble in a system. Multiple zones are typically assigned to an area so that all of their protection devices combined provide for the complete protection of the premises.
zone reports - the message transmitted to the central station when a zone is in an alarm or a trouble condition.
zone retard - a zone programming option that allows you to assign a retard delay time during which a shorted zone does not initiate an alarm. The retard functions only in zone short conditions and the zone must remain shorted for the full length of the retard delay before the panel recognizes its condition.
zone retard delay time - a programmable delay time that can be assigned to fire, supervisory, auxiliary one, and auxiliary two type zones. The zone retard delay can be programmed from one to 250 second increments. See also zone retard.
zoned systems - identifies the zone area or circuit in which an alarm signal originates. Most modern burglar alarm systems can signal this zone information to the central station alarm company.