Coupled Power Ratio or CPR

Coupled Power Ration (CPR) found in ANSI/EIA/TIA-526-14-A has been replaced with Encircled Flux (EF) in ANSI/TIA-526-14-B Oct 2010.

EF compliance can me met using the DTX-EFM2 fiber adapters and EF-TRCs in accordance with the following knowledge base articles. 
 
ANSI/TIA-568-C

 
ISO/IEC 11801:2010 (ISO/IEC 14763-3)