22
Dialling and call acknowledgement
Auto dialling
When an alarm occurs, the control unit will
immediately dial the phone numbers you stored
and play the recorded messages.
After dialling, the control unit delays 5 seconds
then starts to play the message. It will first play
the address part of the recorded message then
play the specific part message (burglar, fire,
personal attack or medical emergency) depending
on the nature of the alarm.
To ensure the recipient successfully receives
the call, the recipient should acknowledge the
message by pressing the appropriate button on
their telephone set (described below).
The control unit, while playing the message,
will check if there is any acknowledgement signal
being received. If the recipient does not
acknowledge the call, the message will be
repeated for a period of 80 seconds; the control
unit will then consider the call as unsuccessful
and will try to dial the next phone number in
priority.
If more than one number is programmed the
control unit will continue to dial the number(s)
until two emergency calls are successfully
answered with either 1 or 0, or closed down with
a 9 acknowledgement.
• Care must be taken not to have other phones
off the hook, otherwise the alarm call will not
be able to get through.
Interference detection
If interference detection has been set to ‘Disp
and Rep On’, when the system is armed (fully
armed, not home armed) and interference is
detected, the control unit will dial out and play the
address message only. In this alarm condition the
system will not sound either the control unit or
the external siren (unless the external siren has
been set to respond to interference
independently).
Call acknowledgement
When the recipient receives the alarm call, they
should acknowledge it by pressing either the 0, 9
or 1 button on their telephone.
Acknowledging with 0 key
If the recipient presses 0 on their phone set as
the acknowledging signal, the control unit will
then take the following actions.
The control unit will go back offline.
The control unit will continue alarming.
The control unit will try to dial the next phone
number(s) until two recipients have acknowledged
the call.
Acknowledging with 9 key
If the recipient presses 9 on their phone set as
the acknowledging signal, the following will
happen:
The control unit will go back offline.
The control unit will stop alarming and stop
dialling.
Acknowledging with 1 key
The recipient can press 1 to acknowledge the
call and also initiate a two-way voice
communication. Please see Two-way voice
communication in next section for details.
Auto redial
When only one number is stored and that
number is engaged or the control unit does not
receive the acknowledgement signal, the control
unit will automatically redial that number up to a
maximum of 5 times with an interval of 62 sec.
between dialling attempts.
When more than one telephone number is
stored, the control unit will dial in accordance to
the set priority order. If the number being dialled is
engaged or the control unit does not receive the
acknowledgement signal, it will try the next
number in sequence and so on. Each number will
be tried a maximum of 5 times and the redial
interval between each number is 5 sec.
The maximum number of times the control unit
will retry is 15 times.
• When no telephone number is stored or no
address message is recorded, the control unit
will not dial.
• When dialling a pager number, the control unit
will only send the identity code, it will not play
the message and the call is not considered to
be successful.
• The same pager number will be dialled only
once.
• When disarming the system after an alarm
event, the control unit will display the
successful call acknowledgments thus, ‘System
reached:’, followed by the letter(s) of the
recipients stored number(s) (A-F). If the system
has had no successful acknowledgments
(recipient pressing 0, 9 or 1) the display will
show ‘System reached: None’.
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