Farho NEXNO-IC, Руководство по сборке и эксплуатации

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 Phone line. The phone line could be out of order or busy for a
while. An intruder may also attempt to sabotage it by means of
sophisticated methods. This practice is very difficult to detect.

Insufficient time. In some circumstances, even if the device is
working properly, it is possible that response measures are not
taken in time to protect the occupants or their belongings.
 Malfunction of a component. Despite utmost efforts to produce
the most reliable system possible, it could fail on the grounds of
the malfunction of a component.

Inadequate inspections. Most of the problems which cause
malfunctions in a system can be detected by performing regular
checks and maintenance. The whole system should be tested on
a weekly basis and immediately after any intrusion or intrusion
attempt, fire, storm, earthquake, accident or any kind of building
works.

Security and insurance. Despite all its advantages, an alarm
system is not a substitute for home or life insurance. An alarm
system does not exempt the user from taking precautions
regarding prevention and minimisation of damages in an
emergency situation.