同轴电缆
Specialized equipment can inter-connect two LANs over a single twisted pair of wires, such as the Moxa IEX Series, Cisco LRE (Long Reach Ethernet), Enable-IT Ethernet Extender Experts VDSL2, Patton CopperLink or EtherWAN Ethernet Extenders using VDSL technology. Distances of 300 m (1000 feet) at 50 Mbit/s up to at 128 kbit/s is possible. Westermo DDW products are capable of 10 miles at 30.3Mbit/s using SHDSL technology. Coaxial cable are often permitting higher speeds and larger distances than twisted pair wires. The equipment is mostly simple to operate, and the connection wire is common, cheap and maintainable.