4-pair UTP cable and associated connecting hardware whose transmission characteristics are specified up to 100 MHz. It has approximately 3 dB stronger signal strength than standard CAT 5. Category 5e includes additional tests (Headroom, PSACR, PSELFEXT, PSNEXT, and ACR) to ensure that Gigabit Ethernet can run over unshielded Twisted Pair (UTP) cabling. See: ISO 11801 CLASS D