Editing Broadband (section)

=== Computer networks ===
Many [[computer network]]s use a simple [[line code]] to transmit one type of signal using a medium's full bandwidth using its [[baseband]] (from zero through the highest frequency needed). Most versions of the popular [[Ethernet]] family are given names, such as the original 1980s [[10BASE5]], to indicate this. Networks that use [[cable modem]]s on standard [[cable television]] infrastructure are called broadband to indicate the wide range of frequencies that can include multiple data users as well as traditional television channels on the same cable. Broadband systems usually use a different [[radio frequency]] modulated by the data signal for each band.<ref>{{cite book |title= What every engineer should know about data communications |page= 64 |author= Carl Stephen Clifton |publisher= CRC Press |year= 1987 |isbn= 978-0-8247-7566-7 |url= https://books.google.com/books?id=YVi8HVN-APwC&pg=PA64 |quote= Broadband: Modulating the data signal onto an RF carrier and applying this RF signal to the carrier media |url-status= live |archive-url= https://web.archive.org/web/20160529101334/https://books.google.com/books?id=YVi8HVN-APwC&pg=PA64 |archive-date= 2016-05-29 }}</ref>

The total bandwidth of the medium is larger than the bandwidth of any channel.<ref>{{cite book|last1=Clifton|first1=Carl Stephen|title=What every engineer should know about data communications|date=1987|publisher=M. Dekker|location=New York|isbn=978-0-8247-7566-7|page=64|url=https://books.google.com/books?id=WuuYZlJQ4pAC|access-date=21 June 2016|quote=Broadband: relative term referring to a system which carries a wide frequency range.|url-status=live|archive-url=https://web.archive.org/web/20160629163754/https://books.google.com/books?id=WuuYZlJQ4pAC|archive-date=29 June 2016}}</ref>

The [[10BROAD36]] broadband variant of Ethernet was standardized by 1985, but was not commercially successful.<ref>{{cite web |title= 802.3b-1985 – Supplement to 802.3: Broadband Medium Attachment Unit and Broadband Medium Specifications, Type 10BROAD36 (Section 11) |year= 1985 |publisher= [[IEEE Standards Association]] |url= http://standards.ieee.org/findstds/standard/802.3b-1985.html |access-date= July 12, 2011 |url-status= dead |archive-url= https://web.archive.org/web/20120225203804/http://standards.ieee.org/findstds/standard/802.3b-1985.html |archive-date= February 25, 2012 }}</ref><ref>{{cite news |title= Broadband user share pains, gains |author= Paula Musich |pages= 1, 8 |work= Network World |date= July 20, 1987 |quote= Broadband networks employ frequency-division multiplexing to divide coaxial cable into separate channels, each of which serves as an individual local network. |url= https://books.google.com/books?id=gxwEAAAAMBAJ&pg=PA8 |access-date= July 14, 2011 |url-status= live |archive-url= https://web.archive.org/web/20120225203807/http://books.google.com/books?id=gxwEAAAAMBAJ&pg=PA8 |archive-date= February 25, 2012 }}</ref>

The [[DOCSIS]] standard became available to consumers in the late 1990s, to provide [[Internet access]] to cable television residential customers. Matters were further confused by the fact that the [[10PASS-TS]] standard for Ethernet ratified in 2008 used DSL technology, and both cable and DSL modems often have Ethernet connectors on them.