1000Base-RH is a specification for Gigabit Ethernet developed by the IEEE working group802.3bv, GEPOF. 1000Base-RH was developed for automotive Ethernet and uses polymer fibers as the transmission medium.
Polymer fibers have the advantages that they are resistant to electromagnetic emission, galvanically isolate connected components and can be laid quickly and cost-effectively. The properties in terms of electromagnetic interference and electromagnetic noise sensitivity also make the polymer links suitable for communication between the 12 V electrical system and the 48 V electrical system. 1000Base-RH uses 64B66B coding and can bridge a distance of about 700 meters. It has parity checking and a cyclic block check, CRC16. Ethernet-compatible connections with data rates of 100 Mbit/s and 1 Gbit/s are possible over 1000Base-RH.
1000Base-RH has some similarities with 1000Base- T1. The main differences are in the implementation ofOperation, Administration, and Maintenance( OAM). With 1000Base-RH, the OAM messages are transmitted as user data in the Physical Header Data( PHD).