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
Radio or optical communications links between satellites. They serve to interconnect constellations of satellites
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Radio or optical communications links between satellites. They serve to interconnect constellations of satellites. (Satnews) INTERSPUTNIK The international entity formed by the Soviet Union to provide international communications via a network of Soviet satellites. (Satnews) Intersymbol Interference (ISI) 1) In a digital transmission system, distortion of the received signal, manifested in the temporal spreading and consequent overlap of individual pulses to the degree that the receiver cannot reliably distinguish between changes of state, i.e., between individual signal elements. At a certain threshold, intersymbol interference will compromise the integrity of the received data. Intersymbol interference may be measured by eye patterns. (FiberOpticsInfo) Interval Usage Code A field in MAPs and UCDs to link burst profiles to grants. Intra-Local Access and Transport Area (IntraLATA) In the U.S., this term refers to providing services within a local access and transport area (LATA). Regional Bell operating companies (RBOCs) are permitted only to provide intraLATA service; most states allow other carriers to compete with RBOCs within LATAs. Intrinsic Noise Splice losses arising from differences in the fibers being spliced. (FiberOpticsInfo) Also, see noise, intrinsic. (Arris Glossary of Terms) Ionizing A process in which an atom or molecule loses or gains electrons, acquiring an electric charge or changing an existing charge. (TETRA) IP Intellectual Property IP Internet Protocol; a standard protocol, developed by the USA Department of Defense (DOD), for use in interconnected systems of packet-switched computer communications networks. (FiberOpticsInfo) IP1dB An amplifier’s 1 dB input compression point in dBm, and defined as the input level that produces an output 1 dB lower than it should be for linear operation. The output and input 1 dB compression points are related by IP1dB = OP1dB - Gain + 1. See Mathematical Definitions and Derivations for more information. (Ardentech Glossary) IP Address A number that uniquely identifies a computer on the Internet to other host computers, used to route data packets to their intended destination. IP version 4 addresses are 32-bits in length and are displayed as four numbers (each in the range 0-255) separated by dots (e.g., 24.64.231.1). In contrast, IP version 6 addresses are 128-bits in length and can be displayed as eight hexadecimal numbers (in the range 0-FFFF) separated by colons (e.g. FEDC:BA98:7654:3210:FEDC:BA98:7654:3210). IPCONFIG A WindowsNT command prompt utility that displays the computer's TCP/IP configuration. It also allows a computer user to manually release and renew their IP address lease. IPDR Individual Program Data Records IPDR Internet Protocol Data Record IPDR Internet Protocol Design Record IPDR Internal Preliminary Design Review IPG Interactive Program Guide IPI Intelligent Peripheral Interface as defined by ANSI X3T9.3 document. (FiberOpticsInfo) IPPV Impulse-Pay-Per-View IPR Intellectual Property Rights IPsec Internet Protocol Security IPv6 Internet Protocol version 6 (IPv6) is a version of the Internet Protocol (IP) that is designed to succeed Internet Protocol version 4 (IPv4). The Internet operates by transferring data in small packets that are independently routed across networks as specified by an international communications protocol known as the Internet Protocol. Each data packet contains two numeric addresses that are the packet's origin and destination devices. Since 1981, IPv4 has been the publicly used Internet Protocol, and it is currently the foundation for most Internet communications. The Internet's growth has created a need for more addresses than IPv4 has. IPv6 allows for vastly more numerical addresses, but switching from IPv4 to IPv6 may be a difficult process. IPv6 was developed by the Internet Engineering Task Force (IETF) to deal with the long-anticipated IPv4 address exhaustion, and is described in Internet standard document RFC 2460, published in December 1998.[1] Like IPv4, IPv6 is an Internet Layer protocol for packet-switched internetworking and provides end-to-end datagram transmission across multiple IP networks. While IPv4 allows 32 bits for an Internet Protocol address, and can therefore support 232 (4,294,967,296) addresses, IPv6 uses 128-bit addresses, so the new address space supports 2128 (approximately 340 undecillion or 3.4×1038) addresses. This expansion allows for many more devices and users on the internet as well as extra flexibility in allocating addresses and efficiency for routing traffic. It also eliminates the primary need for network address translation (NAT), which gained widespread deployment as an effort to alleviate IPv4 address exhaustion. IPv6 implements additional features not present in IPv4. It simplifies aspects of address assignment (stateless address autoconfiguration) and network renumbering (prefix and router announcements) when changing Internet connectivity providers. The IPv6 subnet size has been standardized by fixing the size of the host identifier portion of an address to 64 bits to facilitate an automatic mechanism for forming the host identifier from link layer media addressing information (MAC address). Network security is also integrated into the design of the IPv6 architecture, and the IPv6 specification mandates support for IPsec as a fundamental interoperability requirement. The last top level (/8) block of free IPv4 addresses was assigned in February 2011, although many free addresses still remain in most assigned blocks and will continue to be allocated for some time.[2] While IPv6 has been implemented on all major operating systems in use in commercial, business, and home consumer environments,[3] IPv6 does not implement interoperability features with IPv4, and creates essentially a parallel, independent network. Exchanging traffic between the two networks requires special translator gateways, but modern computer operating systems implement dual-protocol software for transparent access to both networks using 'tunneling'. In December 2010, despite marking its 12th anniversary as a Standards Track protocol, IPv6 was only in its infancy in terms of general worldwide deployment. A 2008 study [4] by Google Inc. indicated that penetration was still less than one percent of Internet-enabled hosts in any country at that time. Source: http://en.wikipedia.org/wiki/IPv6 18 February 2011 Reference links (from Wikipedia):
Links to related information: http://ipv6.com/ and SCTE sponsored primer: http://www.scte.org/mmpres/Primer/IPv6/index.html The following is a link to a presentation by Geoff Huston, APNIC Chief Scientist, on IPv4 exhaustion and IPv6 transition. It is ten (10) minutes long, but Geoff is an animated speaker and it's a good overview of the situation:
IR Infrared IRC Incremental Related Carriers. A cable plant frequency plan in which all channels except 5 and 6 correspond with the standard channel plan. This technique is used to reduce composite triple beat distortions. (Arris Glossary of Terms) IRD An integrated receiver and decoder for reception of a transmission of voice, video and data. (Satnews)
An arbitrary unit created by the Institute of Radio Engineers (IRE) to describe the amplitude characteristic of a video signal, where pure white is defined as 100 IRE with a corresponding voltage of 0.714 Volts and the blanking level is 0 IRE with a corresponding voltage of 0.286 Volts. 
IRE Unit Scale courtesy of Fiber Optics Info, http://www.fiber-optics.info/fiber_optic_glossary/i Irradiance Power per unit area. (FiberOpticsInfo) ISA Industry Standard Architecture ISA Instrumentation, Systems, and Automation Society; an international, non-profit, technical organization. The society fosters advancement of the use of sensors, instruments, computers, and systems for measurement and control in variety of applications. (FiberOpticsInfo) http://www.isa.org ISDN Integrated Systems Digital Network. Technology that offers digital transmission rates up to 128 kbps over an existing twisted pair copper telephone line. ISDN Adapter A piece of telephone equipment that connects directly to an ISDN line or the S/T Interface of an NT-1. ISDN Digital Subscriber Line (IDSL) IDSL is a 128Kbps standard proposed by the Ascend Corporation for providing low-cost, dedicated 128Kbps data service using telephone lines and central office switch facility space leased from the telephone company. It uses standard Point-to- Point ISDN signaling techniques to link the customer to the central office headend. See also xDSL. ISDN Network Terminator, Type 1 (NT-1) The NT-1 is the dividing line and bridge between the telephone company's ISDN connection ends and the customer's ISDN connection begins. On the telephone company's side of the connection is the two-wire U Interface, on the customer's side of the connection is the eight wire S/T Interface, which connects to the customer's ISDN adapter(s). Most consumer market ISDN adapters sold in North America come with a built-in NT-1, but in Europe and Japan the NT-1 is provided by the phone company, and the ISDN customer has to have equipment that will plug into an S/T bus connection. An external NT-1 can have its advantages. The ISDN S/T interface can support multiple ISDN adapters, as long as each adapter has an S/T Interface and its own SPID. ISDN User Part (ISUP) A protocol within the SS7 suite of protocols that is used for call signaling within an SS7 network ISI Inter-Symbol Interference ISM Band Industrial, Scientific and Medical (ISM) band; part of the radio spectrum that can be used by anybody without a license in most countries. In the U.S., the 902-928 MHz, 2.4 GHz and 5.7-5.8 GHz bands were initially used for machines that emitted radio frequencies, such as RF welders, industrial heaters and microwave ovens, but not for radio communications. In 1985, the FCC Rules (Part 15.247) opened up the ISM bands for wireless LANs and mobile communications. In 1997, it added additional bands in the 5 GHz range under Part 15.407, known as the Unlicensed National Information Infrastructure (U-NII). Europe's HIPERLAN wireless LANs use the same 5 GHz bands, which are entitled the "Broadband Radio Access Network." Numerous applications use the ISM/U-NII bands, including cordless phones, wireless garage door openers, wireless microphones, vehicle tracking and amateur radio. (PCmagazine) ISM Band Power Limits
ISO International Organization for Standardization; established in 1947, ISO is a worldwide federation of national standards committees from 140 countries. The organization promotes the development of standardization throughout the world with a focus on facilitating the international exchange of goods and services, and developing the cooperation of intellectual, scientific, technological, and economical activities. (FiberOpticsInfo) http://www.iso.ch/iso/en/ISOOnline.frontpage Isolation The ability of a circuit or component to reject interference, usually expressed in dB. (Arris Glossary of Terms) Isolation Loss The amount of signal attenuation of a passive device from output port to tap outlet port. (Arris Glossary of Terms) Isolator A device that allows signals to pass unobstructed in one direction but which attenuates their strength in the reverse direction. (Arris Glossary of Terms) Isotropic Antenna A hypothetical omnidirectional point-source antenna that serves as an engineering reference for the measurement of antenna gain. (Satnews) ISP Internet Service Provider; a company or organization that provides Internet connections to individuals or companies via dial-up, ISDN, T1, or some other connection. (FiberOpticsInfo) ISTP Internet Signaling Transport Protocol ISUP Integrated Services Digital Network User Part ISUP ISDN User Part ITFS Instructional Television Fixed Services, a block of frequencies allocated for broadcast of wireless signals by educational institutions in the United States. (Arris Glossary of Terms) ITS Institute for Telecommunication Sciences, ITS, is the research and engineering branch of the National Telecommunications and Information Administration (NTIA), a part of the U.S. Department of Commerce (DOC). The Institute is located at 325 Broadway, Boulder, CO 80305–3328. (ITS) ITU International Telecommunications Union ITV Interactive Television IVR Interactive Voice Response System IXC (Interexchange Carrier) An IXC is a telecommunications carrier that provides service between LECs (local exchange carriers). LECs may be the incumbent carriers that were formed by the breakup of AT&T (previously called the RBOCs or "regional Bell operating companies"), or they may be CLECs (competitive local exchange carriers), which operate as competitive carriers in the same area as the incumbent LECs. LECs operate within one or more local areas called the LATA (local access and transport area). The IXCs (interexchange carriers) provide inter-LATA service (basically, long-distance service). They are allowed to co-locate equipment at LEC facilities and tap into the LEC's switching equipment so that LEC customers can make long-distance calls across the IXC's network. All LECs must provide interexchange carriers with an access point, called the PoP (point of presence). Common IXCs are AT&T, MCI Worldcom, and Sprint. This topic is covered in more detail under "Service Providers and Carriers" and "Telecommunications Regulation." (Sheldon) J: J2EE Java Two Enterprise Edition Jacket Pertaining to wire and cable, the outer sheath which protects against the environment and may also provide additional insulation. (Arris Glossary of Terms) 
Jacket Diagram courtesy of Fiber Optics Info, http://www.fiber-optics.info/fiber_optic_glossary/j Jammer An active electronic counter-measures (ECM) device designed to deny intelligence to unfriendly detectors or to disrupt communications. (Satnews) Java API Java Application Program Interface; a standard interface for use by platform-independent application software. It is expressed in the Java language. Java Development Kit (JDK) A set of resources, including software and documents, provided by Sun Microsystems to enable developers to program in the Java language. Java Media Framework (JMF) A Java package providing functionality primarily for data streaming. Java Secure Socket Extension (JSSE) A Java package providing functionality for secure network communications. JDK Java Development Kit JEDEC Joint Electronic Devices Engineering Council; an international body of semiconductor manufacturers that set integrated circuit (IC) standards. JEDEC was originally created in 1960 to cover the standardization of discrete semiconductor devices and later expanded in 1970 to include integrated circuits. JEDEC does its work through its 50 committees/subcommittees that are overseen by the JEDEC Board of Directors. Member companies in JEDEC include both manufacturers and users of semiconductor components as well as others who are allied to the field. (JEDEC)
Junction Field Effect Transistor; a type of field-effect transistor in which the semiconductor gate region or regions form one or more p-n junctions with the conduction channel. (FreeDictionary dot com) Jitter The variance in latency, or variability in the delay of a stream of incoming packets making up a flow such as a voice communication. JMF Java Media Framework Joule An international unit of work or energy. The work required to maintain a current of one ampere through one ohm for one second. A watt-second. (Arris Glossary of Terms) JPEG Joint Photographic Experts Group; the name of the committee that developed the format. JPEG is a compressed image file format. JPEG images are not limited to a certain amount of color, like GIF images are. Therefore, the JPEG format is best for compressing photographic images. So if you see a large, colorful image on the Web, it is most likely a JPEG file. While JPEG images can contain colorful, high-resolution image data, it is a lossy format, which means some quality is lost when the image is compressed. If the image is compressed too much, the graphics become noticeably "blocky" and some of the detail is lost. Like GIFs, JPEGs are crossplatform, meaning the same file will look the same on both a Mac and PC. File extensions: .JPG, .JPEG. (Tech Terms dot com) JPEG File Interchange Format (JFIF) A platform-agnostic JPEG file format. JSSE Java Secure Socket Extension JTS Joint Test Suite Jumper A short piece of transmission line used to interface components in a broadcast system. (Channel Vision) Jumper Cable Short length of flexible coaxial cable used in older cable television systems to connect system coaxial cable to amplifiers or other cable television components.
Ka-band 33 to 36 GHz (gigahertz) frequency band used by satellites. Orbital location of two- way satellite data services provided by DBS companies. kBaud One thousand symbols of data per second. Equivalent to 1 kb/s for binary signaling. (FiberOpticsInfo) Kbps KiloBits Per Second KDC Key Distribution Center KEK Key Encryption Key Kelvin (K) The temperature above absolute zero at which all molecular motion stops, used with reference to the color temperature of a light source. Zero K is equal to -273.15°C. Also, the unit of measure used to rate low noise amplifiers (LNAs) and low noise block converters (LNBs). (Arris Glossary of Terms) Kerberos A secret-key network authentication protocol that uses a choice of cryptographic algorithms for encryption and a centralized key database for authentication. Download 2.22 Mb. Share with your friends:
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