The following are what we feel are the key points of the DD243 policy. This is not
a definitive list and should not be seen as the limit of an installation company's
responsibilities, merely as a guide to some of the main issues.
CONTENTS
Section 4 Primary design and configuration considerations
Section 5
Design, installation and configuration of intruder alarm systems
- 5.4.1 Criteria for sequentially
confirmed alarm conditions
- 5.4.2 Configuration of movement
detectors that may offer a sequentially confirmed alarm
- 5.4.3 Configurations not regarded as
offering a sequentially confirmed alarm condition
Section 6
Other means of minimizing false alarms
- 6.2 Alarm Filtering
- 6.3 Means of Completion of setting
- 6.4 Means of unsetting
Section 4
Primary design and configuration considerations
4.1 Design Objectives
IASs (Intruder Alarm Systems) should be designed, installed and configured:
a) to provide effective confirmation facility; and
b) to minimise the likelihood of false alarms.
Emphasis is placed on the design of the system for compliance with the policy
requirements. This requires proper risk assessment including detailed discussion with the
client and taking into account the insurance requirements.
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4.3 Transmission Fault Signals
DD243 recognises that there are two circumstances where there may be high
confidence that there is a genuine intrusion or attempted intrusion.
a) if an ARC receives a transmission fault signal followed by an alarm
signal, or vice versa, from the same protected premises during the same set period;
b) if an ARC receives two transmission fault signals from the same
protected premises, one from each of two transmission paths of different technologies
(e.g. cable and radio)
The ARC and the police will treat either of the above circumstances in the same way as
confirmed alarm messages.
The Provision of two transmission paths is optional - and the provision of two
transmission paths does not equate, of itself, to the system being fitted with
confirmation technology.
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