While this system is an advanced design security system, it does not offer guaranteed protection
against burglary or fire or other emergency. Any alarm system, whether commercial or residential, is
subject to compromise or failure to warn for a variety of reasons. For example:
• Intruders may gain access through unprotected openings or have the technical sophistication to
bypass an alarm sensor or disconnect an alarm warning device.
• Intrusion detectors (e.g. passive infrared detectors), smoke detectors, and many other sensing devices
will not work without power. Battery operated devices will not work without batteries, with dead
batteries, or if the batteries are not put in properly. Devices powered solely by AC will not work if
their AC power supply is cut off for any reason, however briefly.
• Signals sent by wireless transmitters may be blocked or reflected by metal before they reach the
alarm receiver. Even if the signal path has been recently checked during a weekly test, blockage can
occur if a metal object is moved into the path.
• A user may not be able to reach a panic or emergency button quickly enough.
• While smoke detectors have played a key role in reducing residential fire deaths in the United States,
they may not activate or provide early warning for a variety of reasons in as many as 35% of all fires,
according to data published by the Federal Emergency Management Agency. Some of the reasons
smoke detectors used in conjunction with this System may not work are as follows. Smoke detectors
may have been improperly installed and positioned. Smoke detectors may not sense fires that start
where smoke cannot reach the detectors, such as in chimneys, in walls, or roofs, or on the other side
of closed doors. Smoke detectors also may not sense a fire on another level of a residence or building.
A second floor detector, for example, may not sense a first floor or basement fire. Moreover, smoke
detectors have sensing limitations. No smoke detector can sense every kind of fire every time. In
general, detectors may not always warn about fires caused by carelessness and safety hazards like
smoking in bed, violent explosions, escaping gas, improper storage of flammable materials,
overloaded electrical circuits, children playing with matches, or arson. Depending upon the nature of
the fire and/or the locations of the smoke detectors, the detector, even if it operates as anticipated,
may not provide sufficient warning to allow all occupants to escape in time to prevent injury or
• Passive Infrared Motion Detectors can only detect intrusion within the designed ranges as
diagrammed in their installation manual. Passive Infrared Detectors do not provide volumetric area
protection. They do create multiple beams of protection, and intrusion can only be detected in
unobstructed areas covered by those beams. They cannot detect motion or intrusion that takes place
behind walls, ceilings, floors, closed doors, glass partitions, glass doors, or windows. Mechanical
tampering, masking, painting or spraying of any material on the mirrors, windows or any part of the
optical system can reduce their detection ability. Passive Infrared Detectors sense changes in
temperature; however, as the ambient temperature of protected area approaches the temperature
range of 90° to 105°F (32° to 40°C), the detection performance can decrease.
• Alarm warning devices such as sirens, bells or horns may not alert people or wake up sleepers if they
are located on the other side of closed or partly open doors. If warning devices sound on a different
level of the residence from the bedrooms, then they are less likely to waken or alert people inside the
bedrooms. Even persons who are awake may not hear the warning if the alarm is muffled from a
stereo, radio, air conditioner or other appliance, or by passing traffic. Finally, alarm warning devices,
however loud, may not warn hearing-impaired people or waken deep sleepers.
• Telephone lines needed to transmit alarm signals from a premises to a central monitoring station
may be out of service or temporarily out of service. Telephone lines are also subject to compromise by
sophisticated intruders. (continued)
THE LIMITATIONS OF THIS ALARM SYSTEM
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