Appendix
Security System Limitations
4998122475C Security System User's Guide
Appendix
Security System Limitations
Not even the most advanced security system can
guarantee protection against burglary, fire, or
environmental threats. All security systems are subject
to possible compromise or failure-to-warn for a variety
of reasons including, but not limited to, the following:
• If sirens or horns are placed outside the hearing
range of people in remote areas of the building or
in areas that are frequently closed off, they do not
provide the intended protection.
• If intruders gain access through unprotected points
of entry, the system will not detect their entrance.
• If intruders have the technical means of bypassing,
jamming, or disconnecting all or part of the system,
they will not be detected.
• If the AC power supply is OFF and the back-up
battery is either missing or dead, sensors will not
detect intrusion nor the fire points detect the
presence of smoke.
• Smoke detectors cannot detect smoke in chimneys,
walls, or roofs, or smoke blocked by a closed door.
They may not detect smoke or fire on a level of the
building different from the one on which they are
located. Smoke detectors may not be able to warn
in time about fires started by explosions, improper
storage of flammables, overloaded electrical
circuits, or other types of hazardous conditions.
• If phone lines are out of service, reports from the
security system to the security company cannot be
sent. Telephone lines are vulnerable to compromise
by several means.
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