Bosch B9512G Owner's Manual page 211

Control Panels
– If your security system's method of communication is down
(phone line, cellular, or internet problems), reports from the
security system to the security company cannot send.
Communication methods are vulnerable to compromise by
several means.
Inadequate maintenance and failure to test are the most common
causes of alarm failure. Testing the system once a week is
strongly recommended to ensure all system components are
working properly.
Although having a security system might make you eligible for
reduced insurance premiums, the security system is no
substitute for insurance. Warning devices cannot compensate
you for loss of life or property.
Bosch Security Systems, Inc.
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2015.01 | 02 | F.01U.307.371