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For status messages #2, #3, and #4, the Dialer Unit will initiate an alert call. See section 4.2 for
additional information about the alert notification process.
If status message #1 is communicated between the Dialer Unit and Loop Sensor, the Dialer Unit will
enter a “sleep mode”. The Dialer Unit will initiate the RF Link communication message to the Loop
Sensor every five minutes.
If a response message is not received back from the Loop Sensor, the Dialer Unit will send the RF
Link message again. The Dialer Unit will continue to send the RF Link message every minute for a
period of one (1) hour until a response is received from the Loop Sensor. If no response is given over
the one hour period, the Dialer Unit initiates a service call for “Loss of RF Communication Link.”
After the service technician has completed the necessary repairs, the Dialer Unit will re-enter normal
operating mode after receiving the loop status message from the Loop Sensor.
4.2 Alert Conditions
Following calibration, the Loop Sensor shall continuously monitor and measure the signal field
strength (amplitude). The Loop Sensor detects the following alert conditions.
4.2.1 Decrease or Absence of Signal Field
The Loop Sensor shall generate a
loop low failure alarm
when the signal field on either sensing
circuit is reduced by X% (X% of the calibration value). The loop low failure notification will consist
of a slow flashing Red LED and transmission of an alert to the Dialer Unit.
4.2.2 Increase in Signal Field
The Loop Sensor shall generate a
loop high failure alarm
when the signal field on either sensing
circuit is increased by 50% (150% of the calibration value). The loop low failure notification will
consist of a slow flashing Red LED and transmission of an alert to the Dialer Unit.
4.2.3 Loss of RF Link with the Loop Sensor
If a response message is not received back from the Loop Sensor, the Dialer Unit will send the RF
Link message every minute for a period of one (1) hour until a response is received from the Loop
Sensor. If no response is given over the one hour period, the Dialer Unit initiates a service call for
the “Loss of RF Communication Link.”
4.3 Alert Notification
When an alert condition is detected, the Dialer Unit initiates an alert notification call to Invisible
Fence, Inc. The Dialer Unit’s serial number and the alert code will be transmitted. Upon receipt of
this information, Invisible Fence, Inc. will send a notification email to the appropriate Dealer and
Distributor.
4.3.1 Alert Notification Email
The alert notification email will be sent to the Dealer’s and Distributor’s invisiblefence.com address.
The email will contain the following information.
1. Customer name
2. Customer address
3. Customer contact phone number
4. Serial number of the Dialer Unit
