- Of or relating to high-bandwidth data transmission.
- Of or relating to data transmission that uses multiple channels so that multiple pieces of data can be transmitted simultaneously.
(comparative more broadband, superlative most broadband)
broadband - Computer Definition
- In the Wide Area Network (WAN) domain, broadband is an imprecise term referring to a circuit or channel providing a relatively large amount of bandwidth. The ITU-T defines broadband in Recommendation I.113 as a transmission rate faster than the primary rate (referring to ISDN), which translates into 1.544 Mbps in North America and 2.048 Mbps in most of the rest of the world.The U.S. Federal Communications Commission (FCC) does not define broadband, but defines high-speed services as supporting a data rate of at least 200 kbps in at least one direction and advanced telecommunications capability as at least 200 kbps in both directions. Asymmetric digital subscriber line (ADSL) generally is described as a broadband access technology, even though many ADSL services operate at less than T1 and E-1 rates. In this context, ADSL certainly operates at much higher rates than the predecessor modem technology, which operates at narrowband rates of less than 64 kbps. Relatively speaking, ADSL is broadband in nature, even at very low operating rates. See also bandwidth, FCC, ISDN, ITU-T, narrowband, and wideband.
- In the Local Area Network (LAN) domain, broadband refers to a multichannel RF-based (Radio Frequency-based) LAN, with the channels derived through frequency division multiplexing (FDM).The workstations and other attached digital devices access analog channels through radio frequency (RF) modems that accomplish the digital-to-analog conversion process. Broadband LANs commonly use 75-ohm CATV-type coax, and use CATV-style connectors, taps, filters, and amplifiers in a tree and branch topology, which essentially is a variation of the bus with multiple branches off of a main root bus, much as there are branches off of the main trunk of a tree.The only broadband LAN to gain any significant following was 10Broad36, which has long been considered obsolete. All other LANs are baseband in nature. See also 10Broad36, baseband, B-ISDN, bus topology, CATV, channel, FDM, LAN, and tree topology.
(1) High-speed transmission. The term commonly refers to Internet access via a variety of high-speed networks, including cable, DSL, FiOS, Wi-Fi, WiMAX, 3G, 4G and satellite, all of which are faster than analog dial-up by a huge magnitude. The term is sometimes used to contrast broadband providers with private networks, such as in the phrase "public broadband works for regular traffic in our branch offices, but we use private lines for our mission critical business." A Formal Definition In early 2015, the U.S. Federal Communications Commission (FCC) redefined the minimum broadband speed as 25 Mbps download and 3 Mbps upload, updating the FCC's 2010 rating of 4 and 1 Mbps. The term always referred to a higher-speed connection, but the broadband threshold varied with the times (years ago, the widely deployed 1.5 Mbps T1 line was considered broadband speed). However, with the 2015 definition, more than 50 million rural Americans do not have access to broadband speeds. See broadband router, wireless broadband, T1, cable modem and DSL.
(2) Transmitting data by modulating a carrier wave in order to differentiate it from other signals in the air or in a wire. For example, frequency division multiplexing (see FDM) is used to carry hundreds of channels digital TV in a single coaxial cable. In this context, broadband is used in contrast with "baseband," which refers to data that have not been modulated or multiplexed (see baseband and TDM). However, in most cases, the term "broadband" means high-speed transmission as in definition #1 above.
broadband - Investment & Finance Definition
A digital technology that gives users high-speed Internet access where data, e-mail, videos and music can be downloaded at speeds significantly faster than those available through dial-up modems. Often, broadband service is provided through cable lines from a cable telephone company. Another type of broadband connection, digital subscriber lines (DSL) provides high-speed broadband service using a special telephone line.