Hi Teltonika Support Team,
I am experiencing an issue where our RUTX50 (equipped with the Quectel RG501Q modem) is completely unable to attach or register onto our Private 5G Standalone (SA) network. The router remains indefinitely stuck in a searching state (+C5GREG: 0,2).
On the exact same Private 5G gNodeB and Nokia Core infrastructure, our Cisco IR1101 and Nokia 5G industrial routers connect instantly and operate without issue.
Our Nokia Core team has confirmed that the network is running 3GPP Release 15 and above deployment.
Troubleshooting Already Attempted on RUTX50:
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Configured the WebUI Mobile Interface to match the exact custom APN (), IPv4 PDP type, and CHAP credentials.
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Set the Network Type to “5G SA Only” in the WebUI.
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Issued CLI AT commands to disable all LTE and 5G NSA bands (
AT+QNWPREFCFG="lte_band",0and"nsa_nr5g_band",0) to avoid scanning loops. -
Attempted to hard-lock the modem directly to the broadcast channel via
AT+QNWLOCK="mod/nr5g",1,658944,51. -
Attempted to force the private PLMN via
AT+COPS=1,2,"999040".
Despite these changes and cellular stack reboots (AT+CFUN=1,1), AT+C5GREG? continues to return 0,2. The modem appears completely blind to the gNodeB RF layer, suggesting a potential issue with how the RG501Q handles Private 5G synchronization signals, subcarrier spacing (SCS), or Release 15 tracking areas compared to enterprise Cisco/Nokia hardware.
Device Information:
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Product Code: RUTX50
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Serial: 6003645259 Batch no:029
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Firmware Version: RUTX_R_00.07.23.7
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Internal Modem Firmware: RG501QEUAAR12A10M4G
Could you please review this behaviour and advise if there is a specific modem firmware update, an updated configuration path to sort out this issue?
Thank you
Joji