(Telecompaper) BT and Alcatel-Lucent have achieved over 5 Gbps speeds using a potential future development of G.fast broadband technology known as XG.fast in lab tests at BT's R&D campus Adastral Park in Suffolk and Alcatel-Lucent's labs in Antwerp. The tests showed aggregate speeds of 5.6 Gbps over 35 metres of BT cable, a record for a full-duplex data transmission over a standard single BT line at this distance. The technology also performed well over longer distances, with aggregate speeds of 1.8 Gbps over 100 metres. BT sees this as a significant result, as most UK homes are within this distance of their local distribution point, be that a pole or footway box.