AN-LAN-EXT (RJ11 or BNC) can transmit long-distance transmission of network as long as 6,000 meters through twisted pair, telephone line, coaxial cable, etc. And the maximum bandwidth can be up to 148Mbps. This device needs to be used in pair, one as a local receiver and the other as a remote transmitter. When it transmits network and also simultaneously transmit telephone signals (Need for connecting additional splitter ). So you can use the existing network of telephone lines for network signal transmission.
This device has functions for signal channel re-measure, re-interleaving, deinterleaving and properly deal with the problems which may encounter in actual line applications. This device has very wide application fields. To be frank, it can change any of the copper resources into Ethernet copper cable to carry a variety of IP services such as video (IPTV), phone (VoIP) and data (IP Data), provide videoentertainment, voice calls, data transmission and other services. Meanwhile, it can be widely applied in the mass media, railways and urban transport, mining, security monitoring, field communications and other fields.
UPDATE: Time flies, and we have new version, Enhanced LAN extender out, which can reach higher speeds, even 500 Mbit/s!
Or, check more details here:xDSL series modems and converters