home networkThe carrier's own Signaling System No. 7 (SS7) network. [T1.226-1992]
home pageMain page of a Web site. Usually has hyperlinks to other pages, both inside and outside the site.
homingA process in which a mobile station is directed, or directs itself, toward an electromagnetic, thermal, sonic, or other source of energy, whether primary…
Homing Tandem Operating CompanyThe Homing Tandem Operating Company is the company identified in the Telcordia LERG Routing Guide as being the owner of the tandem to which the NXX code…
homochronousThe relationship between two signals such that their corresponding significant instants are displaced by a constant interval of time.
homogeneous claddingIn an optical fiber, a cladding in which the nominal refractive index is constant throughout.
homogeneous multiplexingMultiplexing in which all of the information-bearer channels operate at the same data signaling rate.
hopAn intermediate stop on the path along which mail is routed when the sender's server and recipient's server are not directly connected.
hop countIn a data communications network, the number of legs traversed by a packet between its source and destination.
horizon angleOf a directional antenna, the angle, in a vertical plane, subtended by the lines extending (a) from the antenna to the radio horizon and (b) from the…
horizontal resolution1. In facsimile, the number of pixels per unit distance in the direction of scanning or recording. 2.
hornIn radio transmission, an open-ended waveguide, of increasing cross-sectional area, which radiates directly in a desired direction or feeds a reflector…
horn gap switchA switch provided with arcing horns, ordinarily used for disconnecting or breaking the charging current of overhead transmission and distribution lines.
hostIn a network, the central computer which controls the remote computers and holds the central databases.
host addressA fully qualified domain name (usually alphabetic) identifying the address of one specific host computer on the Internet.
host central officeAn electronic analog or digital base switching unit containing the central call processing functions which service the host office and its remote…
host computerIn a computer network, a computer that provides end users with services such as computation and database access and that usually performs network control…
host nameA fully qualified domain name identifying one specific host computer within the Internet.
hot siteAn alternate facility that has the equipment and resources to immediately recover the business functions affected by the occurrence of a disaster See also…
hot swapThe ability to remove a failed member of a redundant disk array and replace it with a good drive without bringing down the server or interrupting…
hotlineA point-to-point communications link in which a call is automatically originated to the preselected destination without any additional action by the user…
hotlistA list of frequently used web locations and URLs (Uniform Resource Locators). Note: Hotlists may consist of a) lists of bookmarks accessed by a browser or…
house cableDeprecated term. Communication cable within a building or a complex of buildings.
HubA network device that connects multiple computers/peripherals together and allows them to share data.
Huffman codingA coding technique used to compact data by representing the more common events with short codes and the less common events with longer codes.
Human-computer interfaceThe boundary across which physical interaction between a human being and the application platform takes place [POSIX.0].
human-machine interface (HMI)Human-machine interface between user and terminal/system that consists of a physical section (electro-acoustic, electro-optic transducer, keys, etc.
HuntingIncludes big- and small-game hunting, waterfowl hunting, and trapping.
HybridA class that is a mixture or combination of 2 or more classes. For example, a Druid can be viewed as a Warrior/Rogue/Priest hybrid.
hybrid balanceAn expression of the degree of electrical symmetry between two impedances connected to two conjugate sides of a hybrid set or resistance hybrid.
hybrid cableAn optical communications cable having two or more different types of optical fibers, e.g., single-mode and multimode fibers.
hybrid coilA single transformer that effectively has three windings, and which is designed to be configured as a circuit having four branches, i.e.
hybrid communications networkA communications network that uses a combination of line facilities, i.e., trunks, loops, or links, some of which use only analog or quasi-analog signals…
hybrid computerA computer that processes both analog and digital data.
hybrid connectorA connector that contains contacts for more than one type of service. Note: Examples of hybrid connectors are those that have contacts for both optical…
hybrid couplerIn an antenna system, a hybrid junction used as a directional coupler. Note: The loss through a hybrid coupler is usually 3 dB.
hybrid fiber coaxial cable (HFC)A telecommunications cable in which optical fiber cable and coaxial cable constitute different portions of a network carrying broadband content (such as…
hybrid interface structureIn integrated services digital networks (ISDN), an interface structure that uses both labeled and positioned channels.
hybrid junctionA waveguide or transmission line arranged such that (a) there are four ports, (b) each port is terminated in its characteristic impedance, and (c) energy…
hybrid modeA mode consisting of components of both electrical and magnetic field vectors in the direction of propagation.
hybrid routingRouting in which numbering plans and routing tables are used to permit the collocation, in the same area code, of switches using a deterministic routing…
hybrid setTwo or more transformers interconnected to form a network having four ports that are conjugate in pairs.
hybrid spread spectrumA combination of frequency hopping spread spectrum and direct-sequence spread spectrum. [NTIA]
hybrid systemA renewable energy system that includes two different types of technologies that produce the same type of energy; for e.g.
hydroxyl ion absorptionIn optical fibers, the absorption of electromagnetic waves, including the near-infrared, due to the presence of trapped hydroxyl ions remaining from water…
hyperlinkA link - usually appearing as a highlighted word or picture within a hypertext document - that when clicked changes the active view, possibly to another…
hypermediaComputer-addressable files that contain pointers for linking to multimedia information, such as text, graphics, video, or audio in the same or other…
HyperTextText that includes links or shortcuts to other documents or views, allowing the reader to easily jump from one view to a related view in a non-linear…