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.Addressing Each device has a 32-bit physical ID that isused to establish a connection with anotherdevice.ibility globally.IrFM uses IrDA s Object Exchange (OBEX)protocol to facilitate interoperability between devices.The Infrared Data Association has formed a SpecialInterest Group (SIG) to produce a standard for interappli-ance MP3 data exchange using IR technology.The popularityof MP3-capable appliances begs for a standard connectionbetween the MP3 players, computers, and the network,allowing consumers to easily move music from device todevice without a cable or docking port.The hand-held playershould be able to transfer a song into a car stereo or homeentertainment system.The MP3 SIG is identifying concernsspecific to transferring MP3 data and building solutions intothe protocol.Among the issues that must be addressed is howto identify copyrighted content and describe distributionrestrictions to handle the MP3 content appropriately.SummaryIR s primary impact will take the form of benefits for mobileprofessional users.It enables simple point-and-shoot 172 INTEGRATED DIGITAL ENHANCED NETWORKconnectivity to standard networks, which streamlines usersworkflow and allows them to reap more of the productivitygains promised by portable computing.IrDAtechnology issupported in over 100 million electronic devices, includingdesktop, notebook, and palm PCs; printers; digital cameras;public phones/kiosks; cellular phones; pagers; PDAs; elec-tronic books; electronic wallets; and other mobile devices.When used on a LAN, IR technology also confers substan-tial benefits to network administrators.IR is easy to installand configure, requires no maintenance, and imposes noremote-access tracking hassles.It does not disrupt othernetwork operations, and it provides data security.Andbecause it makes connectivity so easy, it encourages the useof high-productivity network and groupware applications onportables, thus helping administrators amortize the costs ofthese packages across a larger user base.See alsoSpread Spectrum RadioWireless LANsINTEGRATED DIGITAL ENHANCED NETWORKINTEGRATED DIGITAL ENHANCED NETWORKIntroduced in 1994 by Motorola, Integrated Digital EnhancedNetwork (iDEN) is a wireless network technology designedfor vertical market mobile business applications.iDEN oper-ates in the 800-MHz, 900-MHz, and 1.5-GHz bands and isbased on Time Division Multiple Access (TDMA) and GlobalSystem for Mobile (GSM) architectures.It uses Motorola sVector Sum Excited Linear Predictors (VSELP) voice encoderfor compression and quadrature amplitude modulation(QAM) to deliver 64 kbps over a 25-kHz channel.iDEN is promoted as being four-in-one, allowing usersto take advantage of two-way digital radio, digital wirelessphone, alphanumeric messaging, and data, fax, and Internet INTEGRATED DIGITAL ENHANCED NETWORK 173capabilities with one pocket-sized digital handset.This elim-inates the need to carry around multiple communicationdevices and the time-consuming task of synchronizing them.The iDEN phones are full-featured business phones thatprovide features such as call forwarding, call hold, auto-matic answer, and speakerphone.Using the group call fea-ture, users can communicate with one or hundreds of peoplewith the push of a single button without having to set up aconference call or waste time with costly individual calls.The data-ready phones also provide fax and e-mail capabili-ties and access to the Internet.Motorola iDEN phones incorporate a number of valuablemessaging services, including voice messaging, text messag-ing, and alphanumeric paging.This gives the user the abil-ity to receive messages even when the phone is turned off.Some iDEN phones are voice-activated and allow the user torecord voice memos for playback later.The newest phones, such as the i90c, feature J2ME tech-nology, enabling users to download interactive content andapplications from business tools to graphically rich games.Users select Java Apps from the phone s main menu, andthe applications execute directly on the handset instead ofon a server within the network, as is the case with applica-tions based on the complementary Wireless ApplicationProtocol (WAP) [ Pobierz całość w formacie PDF ]
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.Addressing Each device has a 32-bit physical ID that isused to establish a connection with anotherdevice.ibility globally.IrFM uses IrDA s Object Exchange (OBEX)protocol to facilitate interoperability between devices.The Infrared Data Association has formed a SpecialInterest Group (SIG) to produce a standard for interappli-ance MP3 data exchange using IR technology.The popularityof MP3-capable appliances begs for a standard connectionbetween the MP3 players, computers, and the network,allowing consumers to easily move music from device todevice without a cable or docking port.The hand-held playershould be able to transfer a song into a car stereo or homeentertainment system.The MP3 SIG is identifying concernsspecific to transferring MP3 data and building solutions intothe protocol.Among the issues that must be addressed is howto identify copyrighted content and describe distributionrestrictions to handle the MP3 content appropriately.SummaryIR s primary impact will take the form of benefits for mobileprofessional users.It enables simple point-and-shoot 172 INTEGRATED DIGITAL ENHANCED NETWORKconnectivity to standard networks, which streamlines usersworkflow and allows them to reap more of the productivitygains promised by portable computing.IrDAtechnology issupported in over 100 million electronic devices, includingdesktop, notebook, and palm PCs; printers; digital cameras;public phones/kiosks; cellular phones; pagers; PDAs; elec-tronic books; electronic wallets; and other mobile devices.When used on a LAN, IR technology also confers substan-tial benefits to network administrators.IR is easy to installand configure, requires no maintenance, and imposes noremote-access tracking hassles.It does not disrupt othernetwork operations, and it provides data security.Andbecause it makes connectivity so easy, it encourages the useof high-productivity network and groupware applications onportables, thus helping administrators amortize the costs ofthese packages across a larger user base.See alsoSpread Spectrum RadioWireless LANsINTEGRATED DIGITAL ENHANCED NETWORKINTEGRATED DIGITAL ENHANCED NETWORKIntroduced in 1994 by Motorola, Integrated Digital EnhancedNetwork (iDEN) is a wireless network technology designedfor vertical market mobile business applications.iDEN oper-ates in the 800-MHz, 900-MHz, and 1.5-GHz bands and isbased on Time Division Multiple Access (TDMA) and GlobalSystem for Mobile (GSM) architectures.It uses Motorola sVector Sum Excited Linear Predictors (VSELP) voice encoderfor compression and quadrature amplitude modulation(QAM) to deliver 64 kbps over a 25-kHz channel.iDEN is promoted as being four-in-one, allowing usersto take advantage of two-way digital radio, digital wirelessphone, alphanumeric messaging, and data, fax, and Internet INTEGRATED DIGITAL ENHANCED NETWORK 173capabilities with one pocket-sized digital handset.This elim-inates the need to carry around multiple communicationdevices and the time-consuming task of synchronizing them.The iDEN phones are full-featured business phones thatprovide features such as call forwarding, call hold, auto-matic answer, and speakerphone.Using the group call fea-ture, users can communicate with one or hundreds of peoplewith the push of a single button without having to set up aconference call or waste time with costly individual calls.The data-ready phones also provide fax and e-mail capabili-ties and access to the Internet.Motorola iDEN phones incorporate a number of valuablemessaging services, including voice messaging, text messag-ing, and alphanumeric paging.This gives the user the abil-ity to receive messages even when the phone is turned off.Some iDEN phones are voice-activated and allow the user torecord voice memos for playback later.The newest phones, such as the i90c, feature J2ME tech-nology, enabling users to download interactive content andapplications from business tools to graphically rich games.Users select Java Apps from the phone s main menu, andthe applications execute directly on the handset instead ofon a server within the network, as is the case with applica-tions based on the complementary Wireless ApplicationProtocol (WAP) [ Pobierz całość w formacie PDF ]