This Object represents the scaling factor (% value) to be
applied to ATM QoS rates when calculating QoS rates for the
PSN domain . For example, in the cell transport mode the
bandwidth needed in the PSN domain will be higher (since PSN
Transport header, PW header, and optional control word have
to transmitted with every cell), whereas in the AAL5 mode
the bandwidth needed in PSN domain will be less since cell
headers will be removed after reassembly.