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Look at the LEDs (lights) on the LTE5121 front panel:
• The POWER light blinks during start-up and stays on once the
LTE5121 is ready.
• The ETHERNET light turns on if the corresponding ETHERNET port
is properly connected and it blinks when there is traffic.
• The WLAN light stays on and green when the wireless LAN is ready.
The light will not turn on if the wireless connection is not activated. It
is blue when WPS configured.
• The LTE/3G light blinks while the LTE5121 is initializes the LTE
connection and stays on after the LTE connection is ready.
• The SIGNAL STRENGTH lights display the LTE connection's signal
quality. More bars means a better signal.
• The INTERNET light is green when Internet access is available. It
blinks when transmitting data.
• The PHONE lights stay on when your SIP account is registered and
blink if the receiver is off the hook.
If the POWER light does not turn on during start up, turn the LTE5121 off, check
the connections, wait a few seconds and then turn it back on. If the problem
persists, you may have a hardware problem and you need to contact your vendor.
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