1. Temperature range. FMCSA said it does not intend to require an EOBR be so rugged that it operates at extreme temperatures that realistically will not occur in a truck’s normal operating environment. The agency deleted the requirement for a specific operating temperature range from its final rule.
2. Defining the USB connector. A single USB compliant interface featuring a Type B connector, that the USB interface must comply with USB V1.1 and V2.0 USB signaling standards, and implement the Mass Storage class (08h) for software driverless operation.
3. Error codes. FMCSA determined there is a need to clarify thresholds and frequencies for the diagnostic events that would trigger fault codes for these various conditions. The agency determined it would be more appropriate to consider the fault-code reporting thresholds during the implementation period prior to the June 4, 2012, compliance date of the final rule.
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