I purchased a TRB142 last year to use on Australian Telstra’s 4G network, replacing on older product which didn’t support 4G.
When I first implemented it I found the 4G connection would be fine for a few days after initial startup but days later when checking why I wasn’t notified I found the wan interface was in a disconnected state and it wouldn’t attempt to reconnect unless I edited the interface or I restarted it.
I updated the firmware which didn’t fix it so I added a twice a week reboot schedule which increased my chances it would be available when it was needed.
Twice since then it has failed to be available when it was needed.
I applied the latest firmware which seems to have fixed some bugs I noticed in the log, ie the unclean reboot, but now every 2 minutes and 17 seconds the 4G connection seems to reset and go down. The signal strength is good right up until the 2:17 when the interface disconnects and reconnects. It seems like it’s the device itself which is just resetting the interface according to some timer.
I’ve gone through all the settings and cannot resolve it. I’ve disabled most services as I only want to use it for sending SMS using at commands through the serial interface.
Anyone have any idea on what I could try changing to fix it?
2025-03-25 01:33:16
Connected to 50501 operator (internal modem)
2025-03-25 01:33:16
Joined LTE network (internal modem)
2025-03-25 01:33:16
Mobile data connected (internal modem)
2025-03-25 01:33:04
Mobile data disconnected (internal modem)
Could you please let me know if you’ve tried changing the MTU size as suggested in the notification from the WebUI?
If not, please give it a try and let me know if it helps resolve the issue.
Correct. I turned off Auto MTU and change it down manually but it fails and comes up with a lower MTU so I change it down and it fails and comes up with another MTU which can be lower again or higher than the MTU, like a yo-yo. Nothing i set seems to stabilise it.
I have sent you a form to complete. Once it’s submitted, I will reach out to you directly to follow up on this issue.
Please use the ticket ID “12817” when filling out the form.
