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Cisco开发出了能够在现有的电话线上进行5～15 Mbps高速传输的LRE(Long-Reach Ethernet)技术.传输速率为5 Mbps时,最大传输距离为1．5 km；传输速率为10 Mbps时,最大传输距离为1．2 km；传输速率为15 Mbps时,最大传输距离为1 km.该技术可以在保持原有接入线路不变的前提下接以
Cisco has developed LRE (Long-Reach Ethernet) technology that enables high-speed 5-15 Mbps transmission over existing phone lines with a maximum transmission distance of 1.5 km at a transmission rate of 5 Mbps and a transmission rate of 10 Mbps , The maximum transmission distance is 1.2 km and the maximum transmission distance is 1 km at a transmission rate of 15 Mbps.The technology can be connected with the same access line