Page 98 of Current Product Catalog by World Class Wire and Cable

as the logarithm of a ratio decibel attenuation constant a rating for a cable or other transmitting medium which is the relative rate of amplitude decrease of voltage or current in the direction of travel it is measured in decibels per unit length of cable audio a term used to describe sounds within the range of human hearing also used to describe devices which are designed to operate within this range audio frequency that range of frequencies lying within the range of human hearing approximately 20 to 20,000 hz aui attachment unit interface the interface between the ethernet/ieee 802.3 controller and the baseband transceiver or broadband modem autodin automatic digital network the worldwide data communications network of the u.s department of defense avd alternate voice data telephone lines which have been electronically treated to handle both voice and data signals typically used on leased overseas circuits to save money awg american wire gauge a wire diameter specification the lower the awg number the larger the wire diameter awm appliance wiring material bil ­ basic impulse level a reference impulse insulation strength the crest value of a lighting impulse voltage of a specified wave shape which a highvoltage cable or termination is required to withstand under specified conditions binary ­ a half-duplex character-oriented synchronous data communications protocol originated by ibm in 1964 binder ­ a tape or thread used for holding assembled cable components in place birdcage ­ the undesired unwinding of a stranded cable bits per second bps ­ the number of bits of data transmitted by a modem through a phone line in one second to get the bps rate of a modem multiply the number of signal changes per second baud rate by the number of bits of information carried by each change bnc ­ common connector for coax bnc is said to be short for bayonet-niell-concelman bonding ­ the method used to produce good electrical contact between metallic parts of any device used extensively in automobiles and aircraft to prevent static buildup also refers to the connectors and straps used to ground equipment booster ­ a device inserted into a line or cable to increase the voltage boosting generators are also used to raise the level of a dc line transformers are usually employed to boost ac voltages the term booster is also applied to antenna preamplifiers border light cable ­ same as stage cable but more that two conductors type so cable is often used bore hole cable ­ power and/or communication cable suspended down a vertically drilled hole to equipment underground bps or b/s ­ bits per second the number of bits passing a point per second a measure of the speed of transmission of digital information used to describe the information transfer rate on a circuit bpsk ­ binary phase shift keying a modulation method in which binary data is encoded as a 0 or 180 degree shift in the carrier phase bpss ­ basic packet switched system brh-50 ­ single conductor hypalon heat resisting insulation voltage limit 5000 ­ maximum operating temperature 105c brs-cj multi-conductor control cable silicone rubber insulation silicone rubber jacket overall voltage limit 600 ­ maximum operating temperature 200c brs-m ­ single flexible conductor lead wire silicone rubber insulation fiberglass braid overall voltage limit 600 ­ maximum operating temperature 200c braid ­ textile or metallic filaments interwoven to form a tubular structure which may be applied over one or more wires or flattened to form a strap branch joint ­ a cable joint used for connecting one or more cables to a main cable brazing ­ the joining of ends of two wires rods or groups of wires with nonferrous filler metal at temperatures above 800f 427c breaking strength ­ the maximum load that a conductor attains when tested in tension to rupture bridge ­ a circuit which measures by balancing four impedances through which the same current flows wheatstone ­ resistance kelvin ­ low resistance schering ­ capacitance dissipation factor dielectric constant wien ­ capacitance dissipation factor bridge ­ equipment that allows the interconnection of lans allowing communication between devices on separate networks using similar protocols broadban lan ­ lan which used fdm frequency division multiplexing to divide a single physical channel into a number of smaller independent frequency channels the different channels created by fdm can be used to transfer different forms of information ­ voice data and video broadcast ­ the act of sending a signal from none station on a lan to all other stations all of which are capable of receiving that signal b&s ­ brown and sharpe wire gauge ­ same as awg bsc ­ binary synchronous communications a byte or character-oriented ibm communications protocol which has become an industry standard it uses a defi ned set of control characters and sequences for synchronized transmission of binary-coded data between stations in a data communications system bsl ­ basic switching impulse insulation level the crest value of a switching impulse voltage of a specified wave shape which a high-voltage cable termination is required to withstand under specified conditions btt ­ a plastic insulated thermostat cable with two or more conductors with a treated cotton braid overall buffer ­ a protective coating in intimate contact with an optical fiber buna ­ a synthetic rubber insulation of styrene butadiene was known as gr-s now as sbr bunch strand ­ conductors twisted together with the same lay and direction without regard to geometric pattern bunch-stranded conductor ­ a conductor composed of wires twisted together with a given length and direction of lay in such manner that the respective wires at successive cross sections along the length of the conductor do not necessarily form a symmetrical geometric pattern not necessarily occupy the same positions relative to each other buoyant cable ­ originally military type mil-c-2401 with built-in flotation ability many applications have been developed using buoyancy to advantage ­ numerous types and sizes for power communications and telecommunications have resulted bus ­ a network topology which functions like a signal line which is shared by a number of nodes bus-bar wire ­ uninsulated tinned copper wire used as a common lead butyl rubber ­ a synthetic rubber used for electrical insulating purposes bw ­ denotes a braided wire armor outer covering basket weave bwg ­ birmingham wire gauge balanced line ­ a cable having two identical conductors with the same electromagnetic characteristics in relation to other conductors and to ground ballast ­ a device designed to stabilize current flow bandwidth ­ the width of a communication channel measured as frequency in cycles per second or hertz a channel s bandwidth is a major factor in determining how much information it can carry bare conductor ­ a conductor having no insulation or jacket baseband ­ a signaling technique in which the signal is transmitted in its original form and not changed by modulation baseband lan ­ a local area network employing baseband signaling baud ­ the number of signal or state changed in a carrier per second also referred to as baud rate the maximum baud rate of a modem is limited by the bandwidth of the phone line named in honor of j.m.e baudot a 19th century french telegraph engineer bcd ­ binary coded decimal group of binary digits represented in decimal numbers with each number allocated four binary digits this system is widely used in telecommunications computer projects bel ­ a unit that represents the logarithm of the ratio of two levels the number of bels is equal to the logarithm10 of p1/p2 see db belfoil r ­ belden trademark for highly effective electrostatic shield using reinforced metallic foil bell 103 ­ the north american standard for 300-bps modems implemented by bell labs now a division of at&t in 1963 bell 212a ­ the north american standard for 1,200bps modems implemented in 1976 bx ­ building wire with flexible interlocked steel armor c c ­ symbol designation for capacitance bias supply and centigrade cable belted ­ a multi-conductor cable having a layer of insulation over the assembled insulated conductors cable bore-hole ­ the term given vertical riser cables in mines cable joint ­ a complete insulated splice or group of insulated splices contained within a single productive covering or housing in some designs the insulating ber ­ bit error rate the ratio of received bits that are in error relative to a specific amount of bits received usually expressed as a number referenced to a power of 10 96 corporate headquarters w234 n2091 ridgeview parkway court waukesha wi 53188-1023 www.wcwc.com phone 262.951.7777 purchasing/acct fax 262.951.7704 sales fax 262.951.7778 glossary b backfill ­ the materials placed to fill an excavation such as sand in a trench glossary

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