What is the difference between FMS and OBD. Whether OBD is a standard or protocol.
Recently I am working on a GPS device to tap the CAN bus in order to integrate with our fleet management system. In configuration I found two options: FMS and OBD, and couldn't find the difference between them. On Googling I came across J1939. Both FMS and OBD are compliant with J1939. What is J1939, as there is a separate connector available?
If both options are available, which one should I go for? On Googling I found FMS is used by many vehicles and that OBD is used only in the USA.
Can someone provide me with details on these? Thanks in advance.