(((ELKRON))) - CT10-M / CT11-M
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6.1 ALARM PROCEDURE
1.
Alarm status is tripped when input I1 or I2 switches from de-engerised according to
the programmed mode (N.C., Balanced, N.O., 24h, AND TC, instantaneous or de-
layed). The “ALARM MEMORY” LED will blink.
2.
At the same time, the communicator will send alarm signals (voice and/or text mes-
sages) to the programmed telephone numbers associated with the alarm input. In
the case of CT11-M, alarm signals will be sent on the programmed telephone network
(see “Telephone number/network association” menu).
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.
The call cycle can be stopped locally by entering the user or installation code (where
enabled) on the keypad. If the input which generated the event is associated to the
TC, the call cycle can be stopped by a barring command received on input I3 (TC
ON). Note that the communicator can complete the call in progress during barring.
4.
The procedure is repeated for all telephone number to which inputs are associated
(see “Input programming”).
5.
The communicator will call each associated telephone number three times. If answer
check is programmed (PSTN), a telephone number which does not answer will not be
called back (CT11-M only).
6.
After ending the telephone cycle, the alarm memory LED will continue to blink and the
inputs generating the event can be viewed in the “SYSTEM STATUS” menu.
7.
Stored information will be automatically reset at the next transaction of the TC input
from ON to OFF, i.e. following a new system activation or manually by means of the
“SYSTEM STATUS” menu.
6.2 GSM VOICE CALL CYCLE
• Following an alarm, a voice call is made to each telephone number (the GSM network
must be enabled for CT11-M). A basic message (10 sec.) is followed by the specific
message related to the event: input, output or failure. Other specific messages will be
added if other events to which the telephone number which is receiving the call is
associated occurs at the same time.
• The voice message will be repeated three times to each telephone number. After this,
the call will be ended and the other programmed numbers will be called. A tone allowing
the user who is listening to the message to enter the “Lock code” (
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in DTMF, see
paragraph 6.6 “STOPPING THE CALL CYCLE”) will be sent at the end of each voice
message. If the call cycle is not locked, the cycle will continue with the next number. The
programmed telephone numbers are called in sequence from the first to the last, for a
total of three cycles.
Three calls are made to each number to provide a wider margin of confidence that a call
will be received correctly. The following anomalies may occur during the voice call cycle,
both to fixed and mobile network numbers:
1. No answer or busy tone from PSTN network telephone:
The communicator will repeat the message sequence three times and the telephone
will be called three times.
6.0 Operating principles
