This series is the point-to-point Ethernet extender designed to operate in harsh environments that efficiently extends 10/100 Ethernet circuits to over 300 meters at 50 Mbps using existing twisted pair copper wire. It allows Ethernet connectivity in existing facilities without pulling extra cable or coaxial cable. It is the perfect solution for Ethernet on the factory floor where systems have been upgraded from slower serial communications to Ethernet networking.
Axiomtek iCON-32300 Series, Ethernet over Telephone Line & Ethernet over Coaxial Cable
see also M2M - Machine to Machine