ZyXEL 5101 NR

beatus
beatus Posts: 7
First Comment Friend Collector First Anniversary
edited December 2022 in Mobile Broadband
Normally, my zyxel 5101 has three LEDs on: green - blue - green, and they are on constantly.  From time to time the blue LED starts to flash incessantly, which I can only stop by logging into the web interface and making any change in the configuration.
What is the reason for the blinking of the BLUE LED?
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  • tonygibbs16
    tonygibbs16 Posts: 670
    25 Answers 500 Comments Friend Collector Second Anniversary
     Guru Member
    Hello @beatus

    According to the NR5101 user guide I have just downloaded from https://support.zyxel.eu/hc/en-us/articles/4403365084818-Advanced-Downloads-for-5G-devices there should not ever be a flashing blue LED.
         - Blue should only ever appear solid on an LED according to table 2 of the user guide.

    Can you please say which LED is flashing Blue?

    Can you also please say which firmware release you have?

          - something might have changed, but I cannot see the release notes.

    Kind regards,
         Tony
  • beatus
    beatus Posts: 7
    First Comment Friend Collector First Anniversary
    tonygibbs16 said:
    Hello @beatus

    According to the NR5101 user guide I have just downloaded from https://support.zyxel.eu/hc/en-us/articles/4403365084818-Advanced-Downloads-for-5G-devices there should not ever be a flashing blue LED.
         - Blue should only ever appear solid on an LED according to table 2 of the user guide.

    Can you please say which LED is flashing Blue?

    Can you also please say which firmware release you have?

          - something might have changed, but I cannot see the release notes.

    Kind regards,
         Tony
    The second LED from left is flashing blue
    The router is running V1.00(ABVC.4)C0


  • beatus
    beatus Posts: 7
    First Comment Friend Collector First Anniversary
    The second LED is flashing blue
    Router runs V1.00(ABVC.4)C0
  • beatus
    beatus Posts: 7
    First Comment Friend Collector First Anniversary

  • tonygibbs16
    tonygibbs16 Posts: 670
    25 Answers 500 Comments Friend Collector Second Anniversary
     Guru Member
    Hello @beatus

    Blue on the Internet LED means connected to a 5G network.

    Does it flash on and off, or between Blue and Green?
         - Green on the Internet LED would mean connected to 3G/4G.
         - Blinking Green would mean a new SMS message.

    Kind regards,
         Tony
  • beatus
    beatus Posts: 7
    First Comment Friend Collector First Anniversary
    Lot’s of question Tony…..

    As I said already it is FLASHING ON and OFF
    not between Blue and Green
    And I know, that green means new SMS 

    Once again for you: it is flashing BLUE ON and OFF
  • Arapaima
    Arapaima Posts: 3
    First Comment

    I'm also jumping in. Mine NR5101 also blinking blue. According to the manual there is no mention of blinking blue light?

  • beatus
    beatus Posts: 7
    First Comment Friend Collector First Anniversary

    Seems nobody at Zyxel is aware of this and unable to help

  • Arapaima
    Arapaima Posts: 3
    First Comment

    I have submitted a support ticket at ZyXEL for more information.

  • Arapaima
    Arapaima Posts: 3
    First Comment

    Got a response from Zyxel support with this answer:


    On checking the issue with the blinking like refers to either low signal (which doesn't necessarily need low speed) or a issue with the simcard.

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