RUT956 - restart not autorestart not restoring connection

Networking Solutions
1

Hello.

The router restarts itself, but LTE connection is not restored. Only after disconnecting and restoring the power supply did the LTE connection become successful. There is repeating entry in the log “SIM state changed to not inserted (internal modem)”. Is modem also auto-restarted after no ping event?

3

Greetings, @Pawel1,

Welcome to Teltonika Community!

Could you please clarify a few details so I can better understand the situation:

  • How exactly is the router restarting itself? Is this triggered by a ping-reboot setting or some other method?
  • Which firmware version is currently installed on your device?

Typically, when the router performs a reboot, the modem also restarts, and the LTE connection should automatically re-establish after the device comes back online. Knowing these details will help me provide more precise guidance and troubleshooting steps.

I look forward to your reply.

Warm regards,
V.

4

Hello. It was triggered by a ping-reboot many times. Firmware - beggining of 2025. I just upgraded to last stable one.

I can,t upload a attachment.

Events log
Search…
ID
803
Date
2026-02-01 07:37:57
Source
Web UI
Event group
Connections
Event type
Notice
Event
User “admin” successfully authenticated on HTTP from xxxxxxxxxxxxxxxxx
ID
802
Date
2026-01-31 22:29:36
Source
SMS
Event group
Events
Event type
Notice
Event
SMS received from: +xxxxxxxxxxxxx (internal modem)
ID
801
Date
2026-01-31 22:28:46
Source
Network Operator
Event group
Network
Event type
Info
Event
Connected to 26001 operator (internal modem)
ID
800
1.02.2026, 07:58
RUT956 - Teltonika Networks
31.0.99.152/system/maintenance/eventlog
1/12
Date
2026-01-31 22:28:46
Source
Network Type
Event group
Network
Event type
Info
Event
Joined LTE network (internal modem)
ID
799
Date
2026-01-31 22:28:46
Source
Mobile Data
Event group
Network
Event type
Info
Event
Mobile data connected (internal modem)
ID
798
Date
2026-01-31 22:28:41
Source
Fota
Event group
System
Event type
Notice
Event
Firmware update to RUT9M_R_00.07.19.4 is now available
ID
797
Date
2026-01-31 21:30:52
Source
Switch Events
Event group
Network
Event type
Notice
Event
Port CPU/WiFi (1000 baseT) state link changed to UP
ID
796
Date
2026-01-31 21:30:52
Source
Switch Events
1.02.2026, 07:58
RUT956 - Teltonika Networks
31.0.99.152/system/maintenance/eventlog
2/12
Event group
Network
Event type
Notice
Event
Port LAN2 (100 baseT) state link changed to UP
ID
795
Date
2026-01-31 21:30:52
Source
Switch Events
Event group
Network
Event type
Notice
Event
Port LAN1 (100 baseT) state link changed to UP
ID
794
Date
2026-01-31 21:30:47
Source
Startup
Event group
System
Event type
Notice
Event
Device startup completed
ID
793
Date
2026-01-31 21:30:47
Source
Startup
Event group
System
Event type
Info
Event
Device startup after unexpected shutdown
ID
792
Date
2026-01-31 21:30:40
Source
SIM status
Event group
Events
Event type
Info
1.02.2026, 07:58
RUT956 - Teltonika Networks
31.0.99.152/system/maintenance/eventlog
3/12
Event
SIM state changed to not inserted (internal modem)
ID
791
Date
2026-01-31 21:29:59
Source
Switch Events
Event group
Network
Event type
Notice
Event
Port LAN2 (100 baseT) state link changed to UP
ID
790
Date
2026-01-31 21:29:57
Source
Switch Events
Event group
Network
Event type
Notice
Event
Port link state of port LAN2 changed to DOWN
ID
789
Date
2026-01-31 21:27:16
Source
Switch Events
Event group
Network
Event type
Notice
Event
Port LAN1 (100 baseT) state link changed to UP
ID
788
Date
2026-01-31 21:27:14
Source
Switch Events
Event group
Network
Event type
Notice
Event
Port link state of port LAN1 changed to DOWN
1.02.2026, 07:58
RUT956 - Teltonika Networks
31.0.99.152/system/maintenance/eventlog
4/12
ID
787
Date
2026-01-31 21:26:51
Source
Switch Events
Event group
Network
Event type
Notice
Event
Port LAN1 (100 baseT) state link changed to UP
ID
786
Date
2026-01-31 21:26:49
Source
Switch Events
Event group
Network
Event type
Notice
Event
Port link state of port LAN1 changed to DOWN
ID
785
Date
2026-01-31 21:26:36
Source
Switch Events
Event group
Network
Event type
Notice
Event
Port LAN1 (100 baseT) state link changed to UP
ID
784
Date
2026-01-31 21:26:14
Source
Switch Events
Event group
Network
Event type
Notice
Event
Port CPU/WiFi (1000 baseT) state link changed to UP
ID
783
Date
2026-01-31 21:26:14
1.02.2026, 07:58
RUT956 - Teltonika Networks
31.0.99.152/system/maintenance/eventlog
5/12
Source
Switch Events
Event group
Network
Event type
Notice
Event
Port LAN2 (100 baseT) state link changed to UP
ID
782
Date
2026-01-31 21:26:10
Source
Startup
Event group
System
Event type
Notice
Event
Device startup completed
ID
781
Date
2026-01-31 21:26:03
Source
SIM status
Event group
Events
Event type
Info
Event
SIM state changed to not inserted (internal modem)
ID
780
Date
2026-01-31 21:25:01
Source
Reboot
Event group
System
Event type
Info
Event
Request from ping reboot
ID
779
Date
2026-01-31 21:20:51
Source
Switch Events
Event group
Network
1.02.2026, 07:58
RUT956 - Teltonika Networks
31.0.99.152/system/maintenance/eventlog
6/12
Event type
Notice
Event
Port CPU/WiFi (1000 baseT) state link changed to UP
ID
778
Date
2026-01-31 21:20:51
Source
Switch Events
Event group
Network
Event type
Notice
Event
Port LAN2 (100 baseT) state link changed to UP
ID
777
Date
2026-01-31 21:20:51
Source
Switch Events
Event group
Network
Event type
Notice
Event
Port LAN1 (100 baseT) state link changed to UP
ID
776
Date
2026-01-31 21:20:46
Source
Startup
Event group
System
Event type
Notice
Event
Device startup completed
ID
775
Date
2026-01-31 21:20:46
Source
Startup
Event group
System
Event type
Info
1.02.2026, 07:58
RUT956 - Teltonika Networks
31.0.99.152/system/maintenance/eventlog
7/12
Event
Device startup after unexpected shutdown
ID
774
Date
2026-01-31 21:20:39
Source
SIM status
Event group
Events
Event type
Info
Event
SIM state changed to not inserted (internal modem)
ID
773
Date
2026-01-31 21:16:14
Source
Switch Events
Event group
Network
Event type
Notice
Event
Port CPU/WiFi (1000 baseT) state link changed to UP
ID
772
Date
2026-01-31 21:16:14
Source
Switch Events
Event group
Network
Event type
Notice
Event
Port LAN2 (100 baseT) state link changed to UP
ID
771
Date
2026-01-31 21:16:14
Source
Switch Events
Event group
Network
Event type
Notice
Event
Port LAN1 (100 baseT) state link changed to UP

5

Hello,

For troubleshooting purposes, we will require more sensitive information from your end, such as the troubleshoot file, which may contain passwords, public IP addresses, serial numbers, and such. To avoid leaking this information, we have sent you a form to fill out, which you will receive in your e-mail inbox that you have registered your account with in the forums. In the Ticket ID field of the form, please enter the ID of this thread, which is 17561.

Thank you,
V.