Ethernet Extender Kit 4 Port. Extends 4 ports 10/100Mbps Ethernet RJ45 over copper or CATx line interface, terminal block. The kit includes 2 extenders for near-end (local) far-end (remote) deployment. Typical applications include Enterprise LAN extension, campus LAN expansion. This kit includes a pair of auto-rate Ethernet extenders, using a standard 2-wire connection, which simplifies your life and provides a cost-effective network extension by enabling you to make the most of your pre-existing twisted-pair infrastructure. These 4 port 10BASE-T/100BASE-TX Ethernet Extenders use ADSL technology to provide an easy, inexpensive way to extend the reach of your Ethernet network over ordinary voice-grade copper wire. Devices include external 90-240VAC power supplies.