Altronix
Pace
The Pace long range Ethernet adapters from Altronix make it possible to upgrade surveillance and security systems with IP cameras and edge devices using existing or legacy infrastructure at distances greater than 100m (328 ft) without repeaters. The Pace1PRMT kit consists of a Pace1PRM receiver and a Pace1PTM transceiver and is PoE/PoE+ compliant. It can transmit data at 100mbs full duplex over CAT5e or higher cable up to 500m (1640ft), and up to 150m (500 ft) over single twisted pair (UTP).
http://www.altronix.com/products/product.php?name=Pace1PRMT