The Average Bit Rate of the sender's data stream. Within a transmission burst, the arrival rate may be as fast as rsvpSenderTSpecPeakRate (if supported by the service model); however, averaged across two or more burst intervals, the rate should not exceed rsvpSenderTSpecRate. Note that this is a prediction, often based on the general capability of a type of codec or particular encoding; the measured average rate may be significantly lower.