Transmission Performance Specifications For 4-Pair 100 Ohm Enhanced Category 5e Cabling

’568-B.1 & B.2 specifies enhanced category 5 (category 5e) performance requirements. Category 5e has become the de facto minimum standard for cabling. These documents address the minimum equal level far-end crosstalk (ELFEXT) and return loss requirements necessary to support developments in applications technology and defines the minimum performance needed for a worst case, four-connector channel to support applications that utilize full-duplex transmission schemes, such as Gigabit Ethernet. To ensure additional crosstalk headroom for robust applications support, this document also specifies power sum performance requirements for category 5e cables and cabling.