An ABR service parameter, TDF controls the decrease in ACR associated with TOF. TDF is signaled as TDFF, where TDF = TDFF/RDF times the smallest power of 2 greater or equal to PCR. TDF is in units of 1/seconds.
TDF
Meaning of TDF in English
ATM Forum English vocabulary. Английский словарь организации Форум ATM. 2012