10
Red
Blue
Blue/Green
(Top)
Blue/Green
(Bottom)
FLASHING
OFF
-
-
In this state, the LE4020/LE4020CF is unable to register to the network because it is inactive. The signal
strength indicated is from
any
nearby cell tower (including cellular towers belonging to non-roaming partners)
and does
not
necessarily reflect the signal strength of the intended network. The LE4020/LE4020CF remains
in this state until the SIM is activated. Once the SIM is activated, the LE4020/LE4020CF proceeds to
Step 2a
.
Step 3 – Carrier Scanning Due To Insufficient Signal Strength
The LE4020/LE4020CF scans the surrounding network and connects to the carrier to provide a signal strength
of at least 7 CSQ. While this action is being performed, all four LEDs activate to show a scanning sequence in
progress. The LEDs cycle from top to bottom and then bottom to top until the LE4020/LE4020CF connectes
to a carrier with a signal strength above 7 CSQ (minimum of bottom signal strength LED on solid).
Red
Blue
Blue/Green
(Top)
Blue/Green
(Bottom)
FLASH ON
OFF
OFF
OFF
OFF
FLASH ON
OFF
OFF
OFF
OFF
FLASH ON
OFF
OFF
OFF
OFF
FLASH ON
OFF
OFF
FLASH ON
OFF
OFF
FLASH ON
OFF
OFF
FLASH ON
OFF
OFF
OFF
Once this is completed, the LE4020/LE4020CF proceeds to
Step 4
.
Step 4 - Acquire C24 Communications Programming
The red LED is on solid and the blue LED flashes. The flashing blue LED indicates that the
LE4020/LE4020CF has requested programming from C24 Communications and is waiting for a response.
Red
Blue
Blue/Green
(Top)
Blue/Green
(Bottom)
ON
FLASHING
-
-
Once remote programming is completed, the blue LED switches to solid and the LE4020/LE4020CF proceeds
to
Step 5
.
Step 5 – Receiver Initialization
The red and blue LED’s are both on solid and the signal strength LEDs are off.
Red
Blue
Blue/Green
(Top)
Blue/Green
(Bottom)
ON
ON
OFF
OFF
When the LE4020/LE4020CF sends a request to communicate with the central station, the top signal strength
LED begins flashing.
LE4020/LE4020CF Installation Manual
