Hi all, it seems I’m running into intermittent issues with the modem disconnecting: [ 505.010108] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0 [ 505.010315] option 2-1:1.0: device disconnected [ 505.017686] option1 ttyUSB1: GSM modem (1-port) converter now disconne…

Hi Downgrading fixed the issue for me [image] RUTX50 internal modem unstable after RG520 modem firmware update – SIM failure, gsmctl N/A, no registration Issue Hello, I am experiencing a persistent internal modem problem on a RUTX50 which started immedi…

[image] jschwart: I read that there is a special modem firmware update available that should address this. There is, but that firmware is not for RG501Q-EU modem that you have. There are no known issues with RG501Q-EU based devices as far as i know. They work properly. You issue is caused by …

Many thanks for the responses! [image] heartless: Its either weak signal, bad antenna connection, or some sort of miss configuration at your end or your providers end. These things would all seem related to the modem connection with the cell tower. The message shows the modem connection runn…

The modem in this device behaves strange where you have weak signal and antenna issues. The errors in the logs are misleading because they are pointing to non existent and completely unrelated issue. Those errors disappear when you have strong signal. Im talking from personal experience here. I used…

[image] heartless: The modem in this device behaves strange where you have weak signal and antenna issues. I think that might be something that could be addressed? [image] heartless: Those errors disappear when you have strong signal. Right now the signal is not very strong. I am stil…

[image] jschwart: I think that might be something that could be addressed? I think some modem issues are not really something that Teltonika can solve directly and quickly. They need to be fixed upstream by modem manufacturer Quectel. And i assume Quectel struggles as well because different c…

[image] heartless: They need to be fixed upstream by modem manufacturer Quectel. And i assume Quectel struggles as well because different countries have different providers and those providers have different configurations. Certain issues possibly, but I’d expect the Quectel firmware to have …

[image] jschwart: Certain issues possibly, but I’d expect the Quectel firmware to have a separation between its host connection over USB and uplink cell tower connectivity to such a point that one should not affect the other. These are two separate things. I know what you mean, but thats not …

I looked up the Iskra P-60, but it seems to be just 2x2? Would one need to buy two sets to get 4x4 MIMO? Generally I don’t think this product is sold where I am btw.

RUTX50 modem disconnecting on 7.22.1 + RG501QEUAAR12A11M4G

Networking Solutions Issue

ovo May 5, 2026, 7:45pm 2

Downgrading fixed the issue for me