Alarm verification
Under alarm verification is meant to establish the actual circumstances of an alarm. It is thus found out whether the cause of the alarm being triggered is a real dangerous situation or a false alarm .
Alarm verification measures, as part of a functioning security concept, offer and improve the prerequisites for successful loss prevention. The timely verification of a z. For example, if the alarm is signaled by the burglar alarm system, intervention forces (e.g. police) are able to react to confirmed cases of break-ins or attempted break-ins without delay.
A remote alarm verification cannot replace an on-site inspection by an intervention service after the alarm, but it should perform functions accompanying measures. So z. For example, if a dangerous situation has been established beyond doubt, the immediate deployment of intervention forces from the emergency call and service control center (NSL) and other assistants (e.g. police) can be made possible. Another optional aim of the alarm verification measures is, among other things, to hinder or delay the actions of perpetrators (burglary, assault, arson, vandalism, rampage, etc.) through effective and perceptible measures.
This real-time verification of an alarm signaled by enables intervention forces to react to confirmed cases of robbery, break-ins or attempted break-ins without delay. This improves the prerequisites for subsequent official action (e.g. hazard prevention, search).
Standards and guidelines
The DIN VDE V 0833-3-1 controls the alarm verification for alarm systems such as fire alarm systems , burglar alarm systems , alarm systems or similar systems such. B. Emergency and Hazard Response Systems (NGRS).
Further measures and information on alarm verification from the police point of view can be found in the so-called ÜEA guideline (federal guideline for attack / burglar alarm systems or systems for emergencies / dangers with connection to the police ). This regulates, among other things:
With regard to the preliminary alarm check in the NSL, the following options should be considered between the operator and the NSL:
Acoustic alarm verification
According to DIN CLC / TS 50131-9, it is possible to listen into an object from a distance after an alarm has been triggered by an NSL using acoustic receiving devices (AEG). However, depending on the type and intensity of the noises, it is difficult to assess a specific situation simply by listening. For this reason, acoustic alarm verification is not permitted as the sole means, but only in combination with other alarm verification measures (e.g. in combination with optical alarm verification).
Telephone alarm verification
After an alarm has been triggered (e.g. hold-up alarm), a telephone call in the property can be used to check whether the alarm is correct or incorrect. For this purpose, appropriate clear legitimation and verification measures (e.g. code words) must be agreed between the NSL and the operator and documented in an alarm service and intervention agreement.
Sequential alarm verification
If alarms and follow-up alarms are differentiated in the order in which they were triggered, depending on the type of alarm and, depending on the tactical requirements, in addition to the individual detector group or to the individual detectors to be specified, this alarm sequence can be used for alarm verification. Depending on the number and the logical sequence (e.g. alarm input from an opening detector with a subsequent alarm input from a motion detector in the same room), a real alarm can be assumed. Note: A display of the incoming alarms in a corresponding site plan can additionally support such an alarm preliminary check.
Optical alarm verification
According to DIN CLC / TS 50131-9, optical monitoring devices can be used for alarm verification. Video surveillance systems (VÜA) or video security systems (VSS) for security applications in accordance with the DIN EN 62676 series of standards with corresponding video recording units (VE) are suitable for this purpose, in compliance with the relevant regulations of the Federal Uniform Catalog of Duties for Installers of Video Surveillance Systems (VÜA) of the police in Germany or the ÜEA- Directive. For an optical alarm verification via video from a distance, so-called qualified images are required for a sufficient assessment.
Implementation and measures
A qualified preliminary alarm check by the NSL can thus be carried out by a
- telephone alarm verification,
- sequential alarm verification or
- optical alarm verification
or a combination of these measures. If the alarm cannot be clearly verified by the above measures, a personal preliminary alarm check on site by an intervention service or an intervention center (IS) is required. For this purpose, the NSL should be able to fall back on an IS stationed not far from the monitored object (own office or contract company). Sufficient security for an actual alarm exists if it occurs
- unambiguous acts or omissions (e.g. failure to remove from enclosed property despite being requested to do so) by persons who fulfill at least one statutory criminal offense or
- if their act or omission is also punishable in the attempt.
If there is sufficient security for an actual alarm after a qualified preliminary alarm check by the NSL or a preliminary alarm check on site by an IS, the police can be alerted accordingly without further preliminary checking of the alarm (see also DIN VDE 0833-3-1). All findings, including those based on further observation of the scenario, can be relevant for police alarm tracking for the purpose of hazard prevention and criminal prosecution. These must therefore be reported to the police and documented. Note: If it is a false alarm despite verification, charges from the police for unnecessary operations are to be expected. All alarm pre-testing and intervention measures must be documented by the NSL in an alarm service and intervention agreement. The NSL and the IS should be accredited for testing according to DIN EN ISO / IEC 17025 and certification according to DIN EN ISO / IEC 17065 for the area of emergency and service control centers and security services (taking DIN 77200-3 into account) on the basis of DIN VDE V 0827-11 (for the NSL) or the DIN 77200-1 requirement profile B or C (for the IS) must be tested and certified.