Attenuation-to-crosstalk ratio, far end (ACRF)

The ratio between attenuation and far-end crosstalk, measured in decibels, at a given frequency; a requirement of ANSI/TIA-568-C.2 for twisted-pair cables; formerly referred to as equal-level far end crosstalk (ELFEXT) in ANSI/TIA/EIA-568-B.2.