Fault database
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NET-C05Cross-brand / Protocol · DC Fast ChargersFree sampleMTU black hole on cellular path
MTU black hole on cellular path — large OCPP frames fail while tiny pings seem fine; Boot/FW/MeterValues flake on LTE. protocol field note: keep evidence scrubbed and prove the ranked cause before module RMA on NET-C05.
TRI-PK-NETTritium · PK350 · DC Fast ChargersEarly access pro+Cellular failover flapping
PK cellular failover flapping — early-access modem/SIM/DNS path before board RMA. Field techs should correlate HMI/Cloud…
MDM-SIMSierra Wireless / Semtech · AirLink modem · Modem / cellular solo+SIM not provisioned APN
SIM not provisioned / wrong profile — modem radios up but no PDN to CSMS. Field techs should correlate HMI/Cloud timesta…
MDM-RSSISierra Wireless / Semtech · AirLink modem · Modem / cellularFree sampleRSSI too low in cabinet
RSSI too low in metal cabinet — antenna placement/routing before modem RMA. Field techs should correlate HMI/Cloud timestamps with RSSI ok ≠ stable websocket — check MTU, NAT, and keepalives.
MDM-ANTSierra Wireless / Semtech · AirLink modem · Modem / cellular solo+Antenna connector loose
Antenna connector loose — intermittent RSSI/OCPP with physical RF path broken. Field techs should correlate HMI/Cloud ti…
MDM-FWSierra Wireless / Semtech · AirLink modem · Modem / cellular solo+Modem FW bricks OCPP path
Modem FW bricks OCPP path — modem online to carrier but OCPP stack broken after FW. Field techs should correlate HMI/Clo…
MDM-APNSierra Wireless / Semtech · AirLink modem · Modem / cellular solo+Wrong APN after SIM swap
Wrong APN after SIM swap — classic Soft-offline after carrier change. Field techs should correlate HMI/Cloud timestamps …