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.These features operate over a digital control channel(DCC).In addition to over-the-air programming, the DCCsupports such advanced services as calling line ID, messagewaiting indication, and Short Message Service (SMS).It alsooffers tiered services, allowing operators to tailor pricingpackages for residential and business customers based onlocation and usage.Sleep mode, another DCC feature,improves handset battery life by allowing mobile phones to sleep while idle to conserve power.DCC also improves net-work performance and supports advanced voice coder tech-nology for improved audio quality.SummaryIn 1995, Code Division Multiple Access (CDMA) became thefirst digital cellular technology to offer instant activation tocustomers based on specifications defined by the CDMADevelopment Group (CDG) in 1994.In the future, cellularoperators will look to leverage this capability to offer more OVER-THE-AIR SERVICE ACTIVATION 227value-added services, providing them with the latest appli-cations software coming directly from the network.See alsoCellular TelephonesCode Division Multiple AccessMobile Telephone Switching OfficeTime Division Multiple Access This page intentionally left blank. PPPAGINGPAGINGPaging is a wireless service that provides one- or two-way mes-saging to give mobile users continuous accessibility to family,friends, and business colleagues while they are away fromtheir telephones.Typically, the mobile user carries a palm-sized device (the pager or some other portable device with apaging capability) that has a unique identification number.The calling party inputs this number, usually through thePublic Switched Telephone Network (PSTN), to the pagingsystem, which then signals the pager to alert the called party.Alternatively, callback numbers and short-text messagescan be sent to pagers via messaging software installed on aPC or input into forms accessed on the Web for delivery via anInternet gateway.Regardless of delivery method, the calledparty receives an audio or visual notification of the call, whichincludes a display of the phone number to call back.If thepager has an alphanumeric capability, messages may be dis-played on the pager s screen.Origin of the PagerThe pioneer of wireless telecommunications is Al Gross(Figure P-1).In 1938, the Canadian inventor developed the229Copyright 2003 by The McGraw-Hill Companies, Inc.Click Here for Terms of Use. 230 PAGINGwalkie-talkie.In 1948, he pioneered Citizens Band (CB)radio.In 1949, he invented the pager from radio technol-ogy he used for blowing up bridges via remote control dur-ing World War II.His first attempt to sell pagers to doctorsand nurses in 1960 failed because nurses did not want todisturb patients and doctors did not want to disturb theirgolf games.Gross s ideas were so far advanced that most of hispatents expired before the technology could catch up tomake his inventions a reality.As a result, he did not makemuch money.Had he been born 35 years later, he could havecapitalized on his ideas to become far wealthier than BillGates at Microsoft.Figure P-1 Wireless pio-neer Al Gross (1918 2000)invented many of the con-cepts used today in cordlessand cellular telephony forwhich he held many patents. PAGING 231Paging ApplicationsThere are many applications for paging.Among the mostpopular areMobile messaging Allows messages to be sent to mobileworkers.They can respond with confirmation or a requestfor additional instructions.Data dispatch Allows managers to schedule work appoint-ments for mobile workers.When they activate their pagerseach morning, their itinerary will be waiting for them.Single-key callback Allows the user to read a message andrespond instantly with a predefined stored message thatis selected with a single key [ Pobierz całość w formacie PDF ]
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.These features operate over a digital control channel(DCC).In addition to over-the-air programming, the DCCsupports such advanced services as calling line ID, messagewaiting indication, and Short Message Service (SMS).It alsooffers tiered services, allowing operators to tailor pricingpackages for residential and business customers based onlocation and usage.Sleep mode, another DCC feature,improves handset battery life by allowing mobile phones to sleep while idle to conserve power.DCC also improves net-work performance and supports advanced voice coder tech-nology for improved audio quality.SummaryIn 1995, Code Division Multiple Access (CDMA) became thefirst digital cellular technology to offer instant activation tocustomers based on specifications defined by the CDMADevelopment Group (CDG) in 1994.In the future, cellularoperators will look to leverage this capability to offer more OVER-THE-AIR SERVICE ACTIVATION 227value-added services, providing them with the latest appli-cations software coming directly from the network.See alsoCellular TelephonesCode Division Multiple AccessMobile Telephone Switching OfficeTime Division Multiple Access This page intentionally left blank. PPPAGINGPAGINGPaging is a wireless service that provides one- or two-way mes-saging to give mobile users continuous accessibility to family,friends, and business colleagues while they are away fromtheir telephones.Typically, the mobile user carries a palm-sized device (the pager or some other portable device with apaging capability) that has a unique identification number.The calling party inputs this number, usually through thePublic Switched Telephone Network (PSTN), to the pagingsystem, which then signals the pager to alert the called party.Alternatively, callback numbers and short-text messagescan be sent to pagers via messaging software installed on aPC or input into forms accessed on the Web for delivery via anInternet gateway.Regardless of delivery method, the calledparty receives an audio or visual notification of the call, whichincludes a display of the phone number to call back.If thepager has an alphanumeric capability, messages may be dis-played on the pager s screen.Origin of the PagerThe pioneer of wireless telecommunications is Al Gross(Figure P-1).In 1938, the Canadian inventor developed the229Copyright 2003 by The McGraw-Hill Companies, Inc.Click Here for Terms of Use. 230 PAGINGwalkie-talkie.In 1948, he pioneered Citizens Band (CB)radio.In 1949, he invented the pager from radio technol-ogy he used for blowing up bridges via remote control dur-ing World War II.His first attempt to sell pagers to doctorsand nurses in 1960 failed because nurses did not want todisturb patients and doctors did not want to disturb theirgolf games.Gross s ideas were so far advanced that most of hispatents expired before the technology could catch up tomake his inventions a reality.As a result, he did not makemuch money.Had he been born 35 years later, he could havecapitalized on his ideas to become far wealthier than BillGates at Microsoft.Figure P-1 Wireless pio-neer Al Gross (1918 2000)invented many of the con-cepts used today in cordlessand cellular telephony forwhich he held many patents. PAGING 231Paging ApplicationsThere are many applications for paging.Among the mostpopular areMobile messaging Allows messages to be sent to mobileworkers.They can respond with confirmation or a requestfor additional instructions.Data dispatch Allows managers to schedule work appoint-ments for mobile workers.When they activate their pagerseach morning, their itinerary will be waiting for them.Single-key callback Allows the user to read a message andrespond instantly with a predefined stored message thatis selected with a single key [ Pobierz całość w formacie PDF ]