I would appreciate advice from someone in the UK alarm industry. Due to several
false alarms, the police are requesting that our existing redcare monitored
office alarm system be upgrade to sequential verification.
I understand how it works and why it is required, but feel that our Alarm
engineers are trying to boost the value of the sale by replacing our two pin
number entry keypads with key fob controls, as the only method to disable the
alarm. We currently enter a pin number, but understand that the regulations
relating to sequential verification insist on keyfobs being used and not a pin
Is this correct?
Not with you fully on this. Your security provider is fitting keyfobs
instead of PIN entry alarm termination (disarming) ? If you lose a keyfob
and someone picks it up, then they can go to your workplace and terminate
the intruder alarm with it. (?) If, on the other hand, you forget your PIN.
Tough ! You don't get in without causing an alarm activation.
Sequential Verification is intended as a protection from signalling a false
alarm by only detector. This stops the system sending signals when or if a
detector is faulty or has been inadvertently covered during the set period.
Sequential Verification works by sending a signal to the monitoring centre
telling of a possible intrusion, this signal is then held as active for a
set period of time (normally 30 seconds) until a cancel is sent from the
same detector. If the same detector signals again after the set time, then
the signal is again held until a cancel is sent. The only action taken by
the monitoring centre in such a case, is to contact a keyholder or the
security provider to say that a detector is showing signal and may be
If the monitoring centre receives a signal which is then followed by a
second within the set time (normally 30 seconds), from a separate detection
system, then the alarm is set to active and the appropriate action will be
taken, i.e. Police, Fire Brigade, etc. will called to attend the protected
property. That's why I don't understand what you mean by they are removing
user PIN identification for the alarm system to be terminated (disarmed).
PIN numbers are set into the system to identify that the user is known and
is authorised to set and unset the alarm. PIN's should also be set with a
duress scheme where the user has the option of reversing two numbers on the
code which will also unset the system, but then informs the receiving centre
that a hijack (personal attack) is taking place and that an appropriate
response should be dispatched.
The use of keyfobs to disarm a system is not very good practice and I
personally do not follow the thinking of this type of use. A keyfob could
be used in conjunction with a PIN to disarm or arm the system, but this too
is not good practice as it would cause more false signalling if the user has
not prepared properly for the sequence of events for this type of scheme.
The current Association of Chief Police Officers (ACPO) policy sets out the
sequence of events which should be in place to activate / de-activate a
It is now set to the scheme of, the user(s) upon entry to the property
through the pre-set route, which would be the first signal received from the
system, then disarms the intruder warning system, within the set time
period, by the entry of a PIN code known only to that user, this is the
second signal. This sequence then tells the receiving centre that an
authorised user is on the premises and that no action should be taken on
their part. If this sequence of events is broken in any way, then the
receiving centre will dispatch the action laid out by the particular
variation which has taken place. This sequence used in reverse also sends
the two signals needed to tell the receiving centre that the alarm has been
set and that the premises are now unoccupied. Not following this simple
scheme is asking for more trouble and will not help prevent the signalling
of false alarms.
But how do they know which workplace to go to?
To comply with DD243 for police response, if the main door is open when the
system is set and you don't have any "ACE"
on the system (ie tags), then you will not get any police response only
So I think you need to talk to your insurance company to see if they will
Sequential Verification is when two different detectors are tripped within a
30/60 minute time period.
so if a PIR is tripped in the hall way the alarm will send alarm signal to
the ARC (monitoring centre)
they will ring the keyholders, if another pir trips in a office within 30
minutes then the alarm will send a comfimed signal to the ARC and they will
inform the police.
We don't write the rules, so before you make any decision you need to talk
to your insurance company!!
Hope this helps
If you just use a keypad with codes then confirmation has to be switched off
if the final door is opened.
So no police just keyholders.
If you use tags on the keypad and the final door is opened, a confirmed
signal can only be sent after the entry time is finished and two detectors
are tripped off the entry route.
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