INSYS ISDN TA 4.0
Functions
9.2
Querying the Alarm Inputs
The INSYS ISDN TA 4.0 provides two digital inputs, which trigger an alarm
condition when connecting to ground. The status of these alarm inputs can be
queried via AT command. The INSYS ISDN TA 4.0 can send a message in case of
an alarm. This message can be sent via data connection, as SMS or as e-mail via a
service provider. The INSYS ISDN TA 4.0 evaluates a connection of the input to
ground as alarm. If no positive edge is counted at least 4 seconds after the
negative edge, an alarm will be processed. A pause of at least 5 seconds is
necessary after resetting the input before a new alarm can be triggered.
Figure 10: Pulse evaluation
Configuration with HSComm
Querying the alarm inputs with HSComm is not possible.
Configuration with AT commands
In order to query the conditions
of the alarm inputs, use the
command
AT*I
The reply has the form
<input1>, <input2>
The value "1" indicates an open
input and the value "0" indicates
a closed input. The example on
the right indicates: input 1
closed, input 2 open.
0,1
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