Practical Industrial Data Networks:Design, Installation and ...

BroadbandBroadcastBSBSBSCBSPBufferBurst modeBusAppendix A – Glossary 301a communications channel that has greater bandwidth than avoice grade line and is potentially capable of greatertransmission rates – opposite of baseband – in widebandoperation the data to be transmitted are first modulated on ahigh frequency carrier signal – they can then besimultaneously transmitted with other data modulated on adifferent carrier signal on the same transmission mediuma message on a bus intended for all devices that requires noreplybackspace (ASCII Control-H)British StandardBisynchronous transmission – a byte or character orientedcommunication protocol that has become the industrystandard (created by IBM) – it uses a defined set of controlcharacters for synchronized transmission of binary coded databetween stations in a data communications systembinary synchronous protocolan intermediate temporary storage device used to compensatefor a difference in data rate and data flow between twodevices (also called a spooler for interfacing a computer and aprinter)a high-speed data transfer in which the address of the data issent followed by back-to-back data words while a physicalsignal is asserteda data path shared by many devices with one or moreconductors for transmitting signals, data or powerByte a term referring to eight associated bits of information –sometimes called a ‘character’CANCapacitanceCapacitance (mutual)CATVCCITTCellular polyethyleneCharacterCharacteristic impedanceCICClockcontroller area networkstorage of electrically separated charges between two plateshaving different potentials – the value is proportional to thesurface area of the plates and inversely proportional to thedistance between themthe capacitance between two conductors with all otherconductors, including shield, short-circuited to the groundCommunity Antenna Televisionsee ITUexpanded or ‘foam’ polyethylene consisting of individualclosed cells suspended in a polyethylene mediumletter, numeral, punctuation, control figure or any othersymbol contained in a messagethe impedance that, when connected to the output terminals ofa transmission line of any length, makes the line appearinfinitely long – the ratio of voltage to current at every pointalong a transmission line on which there are no standingwavescontroller in chargethe source(s) of timing signals for sequencing electronicevents – for example, synchronous data transfer