Conrad L. Young’s Wired Broadband and Related Industry Glossary of Terms with Acronyms As of 15 February 2012 Open Access This document is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial
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High-bandwidth Digital Content Protection (HDCP) A specified method from Intel for protecting copyrighted digital entertainment content that uses the Digital Video Interface (DVI) by encrypting its transmission between the video source and the digital display (receiver). The video source might be a computer, set-top box, or DVD player, and the digital display might be an LCD display, television, plasma panel or projector. High-definition Multimedia Interface (HDMI) A specification that combines video and audio into a single digital interface for use with DVD players, digital television (DTV) players, set-top boxes, and other audiovisual devices. The basis for HDMI is High Bandwidth Digital Content Protection (HDCP) and the core technology of Digital Visual Interface (DVI). HDCP is an Intel specification used to protect digital content transmitted and received by DVI-compliant displays. High-definition Television (HDTV) A television signal with greater detail and fidelity than the current TV systems used. The USA currently uses a system called NTSC. HDTV provides a picture with twice the visual resolution as NTSC as well as CD-quality audio. Or television that substantially exceeds NTSC, PAL or SECAM in resolution and quality. High-speed Digital Subscriber Line (HDSL) High-speed digital subscriber line that utilizes existing copper infrastructure of the telephone companies. HDSL offers video and data transmission rates of 1.5 Mbps up to 12,000 feet. See also DSL. HIPPI High Performance Parallel Interface; defined by the ANSI X3T9.3 document, a standard technology for physically connecting devices at short distances and high speeds. Primarily to connect supercomputers and to provide high-speed backbones for local area networks (LANs). (FiberOpticsInfo) HMAC Hashed Message Authentication Code Home Audio/Video Interoperability (HAVi) Architecture A specification defined by a consumer electronics industry consortium. It is composed of a set of Application Program Interfaces (APIs) allowing for the development of applications for a home networked environment. Home Bandwidth Growth (in bits per second, bps) 
Source: “Advantages of Optical Access, Fiber to the Home”, 3rd edition, Spring 2009, published by the FTTH Council, http://www.FTTHCouncil.org. Source: “Fiber-Based Telecommunications Infrastructure for Residential Multi-Dwelling Units”, by Guy Swindell, Applications Engineering Manager, OFS Optics, gswindell@ofsoptics.com, Spring 2009. 
Projected download bandwidth needed by typical home in 2010, 2020, and 2030, assuming three video and voice streams, one gaming stream and one data/e-mail stream per home, simultaneously. The highest estimates for 2030 are close to 30 Gbps because of 3D HDTV. Home Media Server (HMS) A general class of devices designed to receive media content and present it or forward it to another device for presentation. An HMS must use the digital rights interface (DRI) and an approved digital rights management (DRM) in order to get digital content from the cable operator. Home Page The default Web page that is displayed when you open your browser. The browser may be configured to automatically load this page on start-up, or not until the home button is pressed. It also refers to the main page of a Web site. Homes Passed (HP) Total number of homes which have the potential for being hooked up to the cable system. Horizontal (Hum) Bars Relatively broad horizontal bars, alternately black and white, which extend over the entire picture. They may be stationary, or may move up or down. Sometimes referred to as a “Venetian blind” effect. Caused by approximate 60-cycle interfering frequency, or one of its harmonic frequencies. Horizontal Blanking Pulse The pulse that occurs between each horizontal scan line and extinguishes the beam illumination during the retrace period. (Arris Glossary of Terms) Horizontal Retrace The term Horizontal Retrace is used to describe the movement of the scanning electron beam in a cathode ray tube as it travels from the right to the left. The scanning beam begins on the left side of the screen, and when it is finished with the line it switches off, drops down, and moves back to the left side of the screen to start another line. (Glossary of Terms dot Net) Horizontal Retrace Signal The Horizontal Retrace Signal is part of a television broadcast signal that tells the receiving television where to stop scanning (at the end of a line) as well as where to re-align itself on the left side. In a television broadcast signal this is one of several parts used by the television to display the images being sent. (Glossary of Terms dot Net) Horizontal Sync Pulse A 5.08 microsecond rectangular pulse riding on top of each horizontal blanking pulse. It synchronizes the horizontal scanning at the television set with that of the television camera. (Arris Glossary of Terms) Host Device A host device refers to the set-top or receiver containing and executing the OpenCable Application Platform implementation. It is also host to the CableCARD device. Hour Angle Steering direction of a polar mount. An angle measured in the equatorial plane between the antenna beam and the meridian plane. (Satnews) House Drop The coaxial cable that connects each building or home to the nearest feeder line of the cable network. Households Using Television (HUT) AC Nielsen Company term representing the percentage of households in a specific area and in a particular time period that have their television sets turned on as compared to the total number of television households in that area. If, for example, there are 1000 television households in a particular survey area and 500 of those televisions are turned on in a given time period, the HUT level for that area in that time period is 50. The HUT level can be figured as an overall number for the entire United States (a figure used for network programs) or for a local market, as in the case of local programming. A program's share of the audience is calculated on the basis of the HUT level. If a program carried a 20 share, that means that 20% of all households using television had their televisions tuned to that program. (All Business) HP Homes Passed; homes that could be easily and inexpensively connected to a cable network where the feeder cable is nearby. (Birds-Eye dot Net) HPA The Health Protection Agency (HPA) is an independent body that protects the health and well-being of the (UK) population. The Agency plays a critical role in protecting people from infectious diseases and in preventing harm when hazards involving chemicals, poisons or radiation occur. It also prepares for new and emerging threats, such as a bio-terrorist attack or virulent new strain of disease. (TETRA) HPA High Power Amplifier; term usually associated with satellite uplink transmitters used at microwave through millimeter wave frequencies to communicate from an earth station to an orbiting satellite receiver and/or transponder.  
Photograph of 2kW C-Band Satellite Uplink HPA courtesy of MCL, a division of Miteq
HPNA Home Phone Line Networking Alliance HRC Harmonically-related carriers; a cable channel line-up plan where each analog video carrier is a perfect multiple of 6 MHz. This technique is used to mask composite triple beat distortion by zero-beating those distortions with the video carriers. (Arris Glossary of Terms) HS High strength; refers to breaking strength of strand. (Arris Glossary of Terms) HSD High Speed Data HTML HyperText Markup Language HTSA Home Technology Specialists of America; a USA based cooperative of custom retailers and systems integrators. HTSA members represent technologically-advanced, design-savvy home theater retail and design showrooms in more than 100 locations. HTSA members provide high-end custom home theater equipment and systems integration solutions to architects, builders, interior designers, lighting designers and discerning users across the USA. (HTSA) HTTP HyperText Transfer Protocol HTTP Adaptive Streaming Dynamically adapting the video bit rate of HyperText Transfer Protocol encoded content to provide the best quality, or minimum acceptable Quality of Service (QoS) according to defined video specifications, using the instantaneous bandwidth (BW) available to the client. (Adams) HTTPS HyperText Transfer Protocol Secure Hub Device used to connect segments of a network. A hub offers bandwidth on demand to shared resources vs. being fixed to all accessible ports. A signal distribution point for part of an overall system. Larger cable systems are often served by multiple hub sites, with each hub in turn linked to the main headend with a transportation link such as fiber optics, coaxial supertrunk, or microwave. A hardware device that interconnects computers on a Local Area Network and acts as a central distribution point for the communications lines. 
Excerpt from ANSI/SCTE 87-1 2008, “Graphic Symbols For Cable Systems Part 1: HFC Symbols”
Hughes Galaxy A domestic U.S. satellite system which provides a range of telecommunications services. (Satnews) Hum A term used to describe the 60 or 120 cycles per second (cps) sound present in the sound of some communications equipment. Usually hum is the result of undesired coupling to a 60 cycles per second (cps) source or the defective filtering of 120 cycles per second (cps) ripple output of a rectifier. (Arris Glossary of Terms) Hum Bars A form of interference seen as horizontal bars or black regions passing across the field of a television screen caused by 50 or 60 cycle power. (Arris Glossary of Terms) Hum Modulation Undesired modulation of the television visual carrier by the fundamental or low- order harmonics of the power supply frequency, or other low-frequency disturbances. In well designed and maintained cable networks perceptible hum modulation only occurs when certain components fail. US Federal communication Commission (FCC) broadcast standards for hum modulation are five (5) percent. Cable networks typically hold hum modulation to three (3) percent or less. (Hartwick) Hybrid In telephony, a circuit that divides a single transmission channel into two, one for each direction; or conversely, combines two channels into one. (Arris Glossary of Terms) Hybrid Amplifier Also referred to as CATV Hybrid Amplifier Module or “hybrid”. In cable plant, including HFC networks, a term used to describe an amplifier module made up of transistor amplifier elements combined with passive elements to form a CATV hybrid amplifier module. Usually manufactured using the cable industry specific SOT-115J package developed in original form in 1968 by TRW. The first hybrid amplifiers used within revenue generating cable television networks were Lindsay Broadband enabled trunk, bridger, and line extender amplifiers installed in Belgium in 1973. 
Drawing courtesy of “Reliability Considerations in CATV Hybrids”, IEEE Transactions On Cable Television, VOL. CATV-3, NO. 1, January 1978, Al Grant and Jim Eachus, Motorola, Inc. Hybrid Fiber/Coax(ial [cable]) (HFC) HFC system is a broadband bi-directional shared media transmission system using fiber trunks between the headend and the fiber nodes, and coaxial distribution from the fiber nodes to the customer locations. Hybrid System Hydrogen Losses Increase in fiber connector attenuation that occurs when hydrogen diffuses into the glass matrix and absorbs some light. (FiberOpticsInfo) Hyperband The band of cable television frequencies above 300 MHz. (Arris Glossary of Terms) HyperText Markup Language (HTML) The language used to create and display Web documents. It uses “tags” to identify the components of a document (text, graphics, and multimedia) and how those components should behave. HyperText Transfer Protocol (HTTP) The standard for exchanging files (text, graphics, and multimedia) on the World Wide Web. Or HTTP is the transport layer for HTML documents over the Internet Protocol (IP). HyperText Transfer Protocol Secure (HTTPS) An extension of HTTP developed by Netscape to enable security on a Web site. HTTPS encrypts and decrypts your page requests and the data returned to you by a Web server. Hz Hertz
IANA Internet Assigned Numbered Authority IBS INTELSAT Business Services (Satnews) IC Integrated Circuit IC Inter-exchange Carrier ICI Inter-Carrier Interference ICMP Internet Control Message Protocol ICNIRP The International Commission on Non-Ionizing Radiation Protection. It is a body of independent scientific experts who address the important issues of possible adverse effects on human health of exposure to non-ionizing radiation. ICNIRP’s principal aim is to establish guidelines for limiting exposure that will provide protection against known adverse health effects, and to disseminate information and advice on the potential health hazards of exposure to non-ionizing radiation to everyone with an interest in the subject. ICNIRP’s information and advice covers all of the non-ionizing radiations including, the optical radiations (ultraviolet, visible and infrared - and lasers), static and time-varying electric and magnetic fields and radiofrequency (including microwave) radiation, and ultrasound. Much of the information that ICNIRP provides is published in the form of scientific reviews and reports and the proceedings of scientific meetings. The results of these reviews, combined with risk assessments carried out in collaboration with the World Health Organization, contribute to the published ICNIRP Exposure Guidelines. In setting the guidelines, ICNIRP reviews the scientific evidence at a wide range of exposure levels, considering both thermal and potential biological effects. It has identified the level of intensity below which RF energy is not known to cause adverse health effects of any kind and the exposure limits were set a long way below this threshold to provide a safety margin. The guidelines also distinguish between occupational exposure and public exposure with the guidelines for the public being more stringent. This is because the public – a population including infants, elderly people and people who are ill – may be inadvertently exposed, whereas people who work with RF are trained in correct and safe use of the equipment. In 2007 ICNIRP stated “It is the opinion of ICNIRP that present guidelines provide adequate protection against any adverse effect established so far”.
All the equipment supplied and used by companies which are members of TIG complies fully with all the relevant international safety standards. These standards are set by independent expert bodies, and incorporate substantial margins of safety based on thorough and continuing reviews of the whole body of scientific evidence. TIG member companies are committed to supporting further high quality independent research into the potential effects of radio frequency emissions on human beings. (TETRA) Iconoscope The Iconoscope is one of the first television “cameras” developed by Russian inventor Vladimir Zworykin in the early days of television. This early camera tube was equipped for rapid scanning and information storing of the photoactive mosaic that was to become the television broadcast. Equipped with the iconoscope and a cathode ray tube, Zworykin and RCA officially launched the television industry in 1931. (Glossary of Terms dot Net) IDC Insulation Displacement Connector. Connector installed in Antec RMT II and Antec PowerTap to connect and terminate twisted pair wires. (Arris Glossary of Terms) IDCR Interactive Digital Cable Ready IDCP Interactive Digital Cable Product IDP Integrated Detector/Preamplifier IDSL ISDN Digital Subscriber Line IEC Inter-Exchange Carrier IEC International Electrotechnical Commission IEEE Institute of Electrical and Electronics Engineers; a technical professional association that contributes to voluntary standards in technical areas ranging from computer engineering, biomedical technology and telecommunications, to electric power, aerospace and consumer electronics, among others. (FiberOpticsInfo) IEEE 802.3ah An IEEE standard in development for Ethernet in the First Mile (EFM). It is designed to extend Ethernet from the carrier to the customer over copper or fiber lines. EFMC (EFM over Copper) is expected to be based on SHDSL, and EFMF (EFM over Fiber) is expected to be based on EPON (Ethernet PON). The EFM group decided to call the "last mile" the "first mile." Of course! (Encyclopedia, Your Dictionary) IEEE 802.3ah OAM Gigabit Ethernet (GbE) PON (GEPON) operational, administration and maintenance (OAM); as Ethernet moved from an enterprise-centric technology into a wide area network (WAN) and access technology, designers needed to bring carrier-class capabilities to Ethernet designs. One of the most important characteristics of a carrier-class technology is the implementation of operational, administration and maintenance (OAM) management capabilities. While management capabilities were available for enterprise-class Ethernet networks, these same capabilities prior to calendar year 2005 had not been available for WAN and access Ethernet networks. Recognizing this need, the IEEE 802.3 CSMA/CD Working Group (the Ethernet standards body), through its Ethernet in First Mile (802.3ah) task force, defined a set of OAM capabilities for Ethernet links.1 These capabilities were introduced gracefully to ensure backward compatibility with existing Ethernet implementations, while still providing advanced monitoring functionality as required in public networks. The OAM work of the IEEE 802.3ah task force addressed three key operational issues when deploying Ethernet across geographically disparate locations: (1) link monitoring, (2) fault signaling, and (3) remote loopback. Link monitoring introduces some basic error definitions for Ethernet so entities can detect failed and degraded connections. Fault signaling provides mechanisms for one entity to signal another that it has detected an error. Remote loopback, which is often used to troubleshoot networks, allows one station to put the other station into a state whereby all inbound traffic is immediately reflected back onto the link. (EE Times)
IEEE-1394 An electronics standard for connecting devices to a personal computer or set-top box. IEEE-1394 provides a single plug-and-socket connection on which up to 63 devices can be attached with data transfer speeds up to 400 Mbps (megabits per second). The standard describes a serial bus or pathway between one or more peripheral devices and a host's microprocessor. Also known as Firewire or i.Link. IEEE 802.22 The charter of IEEE 802.22, the Working Group on Wireless Regional Area Networks ("WRANs"), under the PAR approved by the IEEE-SA Standards Board is to develop a standard for a cognitive radio-based PHY/MAC/air_interface for use by license-exempt devices on a non-interfering basis in spectrum that is allocated to the TV Broadcast Service (also known as (aka) “TV whitespace”). (IEEE) IETF Internet Engineering Task Force IF Intermediate frequency. A frequency to which a signal is converted for ease of handling. Receives its name from the fact that it is an intermediate step between the initial and final conversion or detection stages. (Arris Glossary of Terms) Superheterodyne architecture radio receivers typically employ one or more IF stages, whereas Zero-IF radio receivers do not employ IF stages. IFRB International Frequency Registration Board of the ITU - International Telecommunications Union; regulates the allocation of satellite orbital locations. (Satnews) IGFET Insulated-Gate Field-Effect Transistor; a type of field-effect transistor having one or more semiconductor gate electrodes. (FreeDictionary dot com) IGMP Internet Group Management Protocol IIN Interferometric Intensity Noise (FiberOpticsInfo)
Internet Key Exchange ILEC Incumbent Local Exchange Carrier Image Dissector Download 2.22 Mb. Share with your friends:
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