S e c t i o n 3 – S y s t e m P r o g r a m m i n g
47
maximum of 255 times until the alarm is correctly acknowledged. The flow diagram used
for external alarm calls is shown in Figure 3-8 below.
External alarm without notification is silenced by answering the external call.
External alarm with notification is silenced and re-armed when the call is answered and the
correct confirmation code is entered.
Alarm functions
Security alarm – this alarm is triggered whenever the contacts change from their normal
state (open or closed).
Entry & exit delay. Security alarms have a built-in 90-second exit delay. This allows 90
seconds to leave an area and secure it during which time the sensor state is ignored. The
entry delay is optional and an alarm will not trigger the instant the sensors change state.
They will trigger only if the alarm has not been correctly reset within 90 seconds.
Social alarm. There are two types of social alarm. They work if there is no activity for a
period of 24 hours.
Type 1 will trigger if no one has used an extension for a period of 24 hours. It is cancelled
as soon as an extension is used. An external call is made if the internal alarm is not cleared
within 1 hour.
Type 2 will trigger if an alarm loop has not changed state for 24 hours, such as a door
contact, unlike type 1 this alarm must be cancelled using the alarm cancel code. The alarm
will ring on all internal extensions initially. If the alarm is still not cleared for a further one
hour and the alarm loop does not change state then an external alarm call will be made.
Figure 3-8 External Alarm Flow Diagram
Dial tone heard, now enter
the confirmation code
Press any digit
2 second tone or alarm
confirmation message
Network disconnect
tone
No
Yes
Yes
No
Alarm is activated and
entry delay has timed out
System dials
external number
Call answered
before 70 secs?
System plays 3 rapid tones,
plus optional voice message
What can be
heard?
Alarm Re-armed
Switch to next external
number
Wrong confirmation code
entered. System waits
approx 3 min from call end
Alarm Silenced
Wait 3 minutes
Confirm. code
enabled?
