10BROAD36

10BROAD36 is an obsolete computer network standard in the Ethernet family. It was developed during the 1980s and specified in IEEE 802.3b-1985.

The standard supported 10 Mbit/s Ethernet signals over standard 75 ohm cable television (CATV) cable over a 3600-meter range. The original Ethernet standard 10BASE5 used a baseband encoding (also known as line coding), where the signal is simply encoded directly on the wire without any sort of carrier wave. Instead, 10BROAD36 modulated its data onto a higher frequency carrier signal, much as an audio signal would modulate a carrier signal to be transmitted in a radio station. This was called broadband at the time; the term has a different (less meaningful) marketing meaning today. This provides several advantages over the more traditional baseband signal. Range was greatly extended, (3600 meters, versus 500 meters for 10BASE5) and multiple signals can be carried on the same cable. 10BROAD36 could even share a cable with standard television channels. The Institute of Electrical and Electronics Engineers standards committee IEEE 802 published the standard that was ratified in 1985 as an additional section 11 to the base Ethernet standard. It was also issued as ISO/IEC 8802-3 in 1989.