Long-Reach Ethernet
Long-reach Ethernet (LRE) can be considered as Ethernet packet-switch technology with a VDSL physical layer using copper as the physical medium. LRE technology can be used to run Ethernet over single-pair wiring at up to 15 Mbps at distances up to 3500 feet, 10 Mbps at distances up to 4000 feet, and 5 Mbps at distances up to 5000 feet at full-duplex line rate. LRE uses frequency-division duplexing (FDD) to separate the downstream channel, the upstream channel, POTS, ISDN, or private branch exchange (PBX) signaling services in the frequency domain. In addition, service providers can overlay voice traffic, both POTS and VoIP, over the same telephone wiring used for data and video. LRE is essentially Ethernet on both ends (between ...
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