System Guide

SME VOIP SYSTEM GUIDE 4.7 72 | P a g e
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5.15.1 Use of Emergency Alarms
As described above, it can be configured if it shall be possible to stop an alarm from the handset. If the possibility to
stop an alarm from the handset is disabled, it is ensured that an alarm is not stopped before someone at e.g. an
emergency center has received the alarm and reacted upon it.
The behavior of a handset when an alarm “is sent” depends on the configured Alarm Signal:
• Call: When the Alarm Signal is configured as “Call”, the handset will make a call to the specified emergency
number, and the alarm is considered stopped when the call is terminated. If it is not allowed to stop the
alarm from the handset, it will not be possible to terminate the call from handset, and the alarm will be
considered as stopped only when the remote end (e.g. the emergency center) terminates the call.
• Message: When the Alarm Signal is configured as “Message”, the handset will send an alarm message to the
specified alarm server, and enable auto answer mode. If Howling is enabled, the handset will also start the
Howling tone. The alarm will not stop until a call is made, and since auto answer mode is enabled, the
emergency center can make the call, and the person with the handset does not have to do anything to
answer the call, it will answer automatically. Again, the alarm is considered stopped, when the call is
terminated with the same restrictions as for the Call alarm signal.
All type of alarms have the same priority. This means that once an alarm is active, it cannot be overruled by another
alarm until the alarm has been stopped. However, if the alarm is not yet active, i.e. if it is in “pre-alarm” state and an
alarm configured with no pre-alarm is fired, then the new alarm will become active and stop the pending alarm.
Alarms with no pre-alarm are considered important, and there is no possibility to cancel them before they are sent,
and therefore alarms with no pre-alarm, are given higher priority than alarms in pre-alarm state.
The Emergency Button could be an example of an alarm which would be configured without pre-alarm. Thus, when
the Emergency Button is pressed you want to be sure the alarm is sent. However, if another alarm was already in pre-
alarm state, it could potentially be cancelled, and if the Emergency Button alarm was ignored in this case, no alarm
would be sent. This is the reason alarms with no pre-alarm, are given higher priority than alarms in pre-alarm state.
For detailed description on how to alarm please see Alarms HOW-TO guide. Link is found in Appendix.