RV50X - Cellular connection goes from good to Network Link Down

AirLink Routers
1

Hi everyone,

It is my first time implementing an RV50X, during I encounter a strange issue where the device has decent connection:
AT Signal Strength (RSSI) -51
AT LTE Signal Strength (RSRP) -76
AT LTE Signal Quality (RSRQ) -7
AT LTE Signal Interference (SINR) 30.0

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It successfully connects to the APN, receives a WAN IPv4 Address but suddenly it changes to Network Link Down and Signal Strength (RSSI) -125.

Rebooting or power cycling the device sometimes restores the connection again for a few minutes…

Any advice would be much appreciated.

Kind regards,

Ben

2

Hi @ben.kennes,

Welcome to our community!
To narrow down the issue, could you please answer the questions below:

  1. Please ensure that antennas are properly attached to RV50X. Two antennas are required when connecting to an LTE network.
  2. Please try using a different SIM that’s working fine to see if the issue still happens.
  3. Please get the log and template log by the instructions and send me:

  • The configuration template file is in ACEmanager → Template, provide any name you desire for the Template Name, and then press Download to retrieve the template file.

  • Collect logs procedure:

    a. Go AceManager > Admin > Configure Logging

    Set all log levels to DEFAULT (NOTICE)

    Set Linux Syslog to DISPLAY

    b. Reboot the gateway.

    c. Perform your test again.

    d. Go Admin → View log → Download Logs.

Thanks,

3

Hi,

Thanks for your response!

  1. Both antennas are attached properly
  2. The SIM is working fine: I validated this using another device
    1. Sometimes the modem works/has signal for 2-3 minutes and all my functionalities work.
  3. You can find the template and logs attached.

Hopefully you can help!

Thanks

20250917_083414_filteredlogs.txt (1.2 MB)

gepsmsnotif.txt (117.7 KB)

4

Hey jerdung,

Do you have more information?

This issue keeps happening, support ticket is very slow…

5

Hi @ben.kennes,

Based on the log file you provided, I notice several lines showing:

Sep 17 07:13:17 notice ALEOS_CELL_RadioDiagnostic: Radio is in Low Power Mode. The LPM voters are: W_DISABLE

The radio module is in Low Power Mode because the W_DISABLE pin is asserted.
From the user side, that pin (W_DISABLE) is inside the RV50X router and I could not find any instructions in either the hardware guide or the software user guide on how to interact with that pin, so this is very likely a hardware issue.
Could you please let me know how many units you are experiencing this issue on?
In this case, it would be best for you to proceed with an RMA. Please refer to the following link: https://customercommunity.sierrawireless.com/s/repair-case

Thanks,