
7
Terms, abbreviations, and symbols
Lock state monitoring
The locks on all access doors to partitions are fitted with bolt
contacts that monitor the lock state of the doors. It ensures
the coerciveness when the system is set. The partitions can
only be set if all access doors are locked. The status of lock
state monitoring is displayed on the keypad.
Coerciveness
On the one hand, coerciveness prevents the intruder alarm
control panel from being set as long as a setting prevention
criterion is present, e.g. if a detector is activated, a door/win-
dow opened, or if a fault state is pending. On the other hand,
coerciveness prevents the unintentional entry into the partition
as long as the system is still set (see Blocking element).
Silent alarm
Alerting which involves sending a message to the response
authorities without activating an internal/external alarm. This
alarm is used for hold-ups.
Transmission device
A telecommunications device built into the intruder alarm
control panel, which automatically transmits alarm, state, and
fault messages via a telecommunication network to an alarm
receiving center (response authority).
Unset
The system is not set. Nevertheless, some functions are still
active, e.g. tamper monitoring, fault monitoring, evaluation of
the technical detector, etc.
VdS (VdSSchadenverhütungGmbH)
An institution supported by the German Insurance
Industry whose functions include drafting standardized
guidelines and testing criteria for intruder alarm systems
and carrying out approval testing of intruder alarm system
concepts and specialist firms.
VdS class
Depending on the threat potential and the number of valuable
items in the building, the insurance company can prescribe an
intruder alarm system with a VdS class (protection class). There
are three VdS classes: A, B and C (VdS classC calls for the stric-
test protective measures).
Blocking element
If an intruder alarm system is set, the blocking element blocks
the door to the partition. Unintentional entry into the partition
and the resulting activation of a false alarm are not possible
(coerciveness).