The service categories to which this set of parameters applies.This is an integer used as a bit mask with each bit that is set representing a single service category for which the resources indicated are avail- able.Bit 5 represents CBR, bit 4 represents real-time VBR, bit 3 represents non-real-time VBR, bit 2 represents ABR, and bit 1 (LSB) represents UBR.