Sierra Wireless airlink es440, Hardware User'S Manual, Page: 22 / 50

AirLink ES440 Hardware User Guide
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Ethernet LEDs
There are four LEDs on the front panel, labeled:
• Network
• Signal
• Activity
• Power
The Ethernet port has two LEDs that indicate speed and activity. When looking
into the connector:
• Activity— The right LED is solid yellow when a link is detected (the cable is
plugged in) and blinks when there is activity.
• Connection Speed—The left LED is green to indicate a 100 Mbps connection
and orange to indicate a 10 Mbps connection. It is off when no cable is
connected.
Table 2-2: LED Operation
Color Network LED Signal LED Activity LED Power LED
Off — — Normal operation No power or
input voltage
≥
36VDC or
≤
9VDC
Solid Green Network Ready Good signal
(RSSI
≥
-85 dBm)
— ES440 is
connected to
nominal power
and is operating
normally
Flashing Green
(1.0 sec. on / 0.5 sec. off) Network Ready—Roaming — Radio is
transmitting or
receiving —
Flashing:
Yellow (0.5 sec.) /
Green (0.5 sec. ) /
Off (0.5 sec.)
Network Ready—Roaming
(No LTE service) — — —
Flashing Yellow
(0.8 sec. on / 0.8 sec. off) No Service — — —
Solid Yellow Connecting to the network Marginal signal
(-100 dBm < RSSI
< -85 dBm) — ES440 entering
low power mode
or system low
level boot
Flashing Red
(0.7 s on / 2.3 s. off)
Authentication/Negotiation
failed No signal
(RSSI
≤
-110 dBm)
— —
Solid Red Link Down
No cellular network is
present or the ES440 is in
radio passthru mode
Poor signal
(-110 dBm < RSSI
<
-100 dBm)
— ES440 not
operational
(failure or in low
power mode)