Broadcom Develops 100 Mbps Ethernet PHY for Cars

Broadcom introduced a physical layer transceiver (PHY) for automotive networks. The Broadcom BroadR-Reach BCM89810 PHY is designed for 100 Mbps Ethernet connectivity over unshielded single twisted pair wiring in vehicles. It performs all of the physical layer functions for encoded Ethernet packets over unshielded copper wire and is fully compliant with RGMII and MII interface specifications, providing compatibility with other Ethernet devices within the vehicle.
http://www.broadcom.com