4-pair, 24awg solid bare copper conductor insulated with polyolefin Exceeds the performance requirements of ISO 11801, EN 50173 and TIA/EIA 568A. It offers a guaranteed performance of 155MHz with a nominal performance of up to 350MHz. There is also an extra margin ACR available to ensure reliable operation of high speed mixed protocols LAN's and low delay and differential to ensure no problems with Fast Ethernet, Gigabit Ethernet and ATM. 155 and 622Mbs