The FMS standard defines a gateway between the J1939 vehicle network and a fleet management system.
FMS Standard lower layer protocols:
- Application layer – SAE J1939/71
- Data link layer – SAE J1939/21 (FMS data are coded according to SAE J1939)
- Physical layer – ISO 11898-2 High-speed CAN, 250 kbit/s bus speed
- Physical connectors – Not standardized
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