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4.1 Operating Modes
The LE4020/LE4020CF features two distinct operating modes: Normal Mode and Service Mode. The unit is in
Normal Mode when the cover is on (tamper is in a restored state). The unit is in Service Mode when the cover
is off (a cover tamper is present).
4.1.1 Normal Mode
The LE4020/LE4020CF has four status LEDs. The following table describes the status LEDs when the com-
municator is in normal operating mode.
This LED indicates trouble conditions.
Red
On (solid): Trouble Requiring Service
1 Flash: Wireless Network Trouble
2 Flashes: Battery Trouble
3 Flashes: Input Power Trouble
This LED indicates cellular radio activity. When on (solid), a phone line trouble condition exists. This LED turns on
Blue
when the interface switches to the wireless network (due to a landline trouble condition). This LED also flashes once
when the LE4020/LE4020CF transmits a signal and twice when it receives a kiss-off from the central station.
Note: If the LE4020/LE4020CF is programmed to be the primary communicator, the blue LED remains off, but still
flashes during the signal transmission as described above.
Blue/Green
This LED indicates signal strength and network technology. If the LE4020/LE4020CF is operating on LTE, the LED is
(Top)
BLUE. If the LE4020/LE4020CF is operating on 3G channel, the LED is GREEN. When this LED is On, the reception
is optimal. This LED switches On only when the bottom LED is on.
This LED indicates signal strength and network technology. If the LE4020/LE4020CF is operating on LTE, the LED is
Blue/Green
BLUE. If the LE4020/LE4020CF is operating on 3G channel, the LED is GREEN.
(Bottom)
If this LED is Off and the Red LED is On, the Wireless Network service is unavailable (NO SERVICE). This LED
flashes when the Wireless Network reception is poor. If this LED is on, the LE4020/LE4020CF is able to communicate
with the 3G (HSPA) or 2G (GPRS) or LTE network.
Section 4: Status LEDs
13
Section 4: Status LEDs
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