Hi, I have recently replaced my RUTX09 with a TRB501. However I keep getting intermittent internet disconnections with the TRB501 a few times a day. I have tried firmware TRB501_R_00.07.17.2, TRB501_R_00.07.17.5 and TRB501_R_00.07.18.1. The error messages are: Event log: Joined 5G-NSA network (int…

Hello, I hope you’re doing well, I have sent you a form to fill out. Once you do please make sure that you use 16039-6 as a ticket ID and let me know once the form is filled out. I look forward to your reply, Best regards, V.

Hi There, I have brand new TRB501 on 7.22 and previously 7.21.3. it has a significant issue relating to the modem, as i have experienced a similar issue on the TRB500. Can i get a link to the modemfota.teltonika-networks.com repository for this specific modem firmware fix please as this device is b…

Hello, @av348oh , I hope you’re doing well, I have sent you a form to fill out. Once you do please make sure that you use 16039-7 as a ticket ID and let me know once the form is filled out. I look forward to your reply, Best regards, V.

Hi Vilius, I’ve got problems with my TRB501 as well. It drops internet connection roughly 5-10 times a day. Can you hook me up with a new modem firmware as well? It is running on the latest (stable) firmware availiable via FOTA.

I have ~70 of the TRB501 and had this issue since day 1, we had previously put in place a daily reboot to ease the issues, but it’s getting too much now, the devices are actually locking up in the field, and I need to dispatch contractors to power cycle them. @Vilius can you please send me the form…

Modem: Quectel RG520N-EBDC No Modem Firmware update is available according to the TRB (it’s also registered in RMS and running 7.23)

Hello, Just to confirm - internet access, at this given moment, is present within the device, correct? Could you also send me a screenshot from the Status → System window, or just send me the current internal modem version you have? The current latest should be RG520NEBDCR03A06M4G_A0.300.A0.300 R…

[INFO] Detected MODEM_N: 0 Modem List: [0] Quectel RG520N-EBDC Telstra | USB_ID: 3-1 | Firmware: RG520NEBDCR03A01M4G_OCPU_02.200.00.000 | builtin:true [ERROR] internet connection is not active [ERROR] Cannot get firmware list from the server. But I am connected to it via RMS, Via the 5G.

On Firmware → Update → Modem I get “Modem updates from the server are not supported for this device.” Device name TRB501 Product code TRB50110XXXX Serial number 6X0X7X4X6X Hardware revision 0007 Batch number 0027 Branch -

TRB501 – Intermittent loss of Internet due to modem crashes

Networking Solutions

Matas May 13, 2026, 9:54am 35

Hi, @MoLeKni & @bofh ,

Unsure if you guys are aware, but presuming you guys have the RG520NE modem (this can be checked under Status → System) - a new update should be available for the modem under System → Firmware → Update Firmware → Modem Firmware.

Please try upgrading & let us know if these issues persist. Here are some reference topics for this issue:

Regards,
Matas.