【正文】 800MHz CDMA 第二代數(shù)字蜂窩移動(dòng)通信業(yè)務(wù)的。 －經(jīng)過(guò) CDMA 網(wǎng)絡(luò)與智能網(wǎng)共同提供的移動(dòng)智能網(wǎng)業(yè)務(wù)，如預(yù)付費(fèi)業(yè)務(wù)等。 －移動(dòng)承載業(yè)務(wù)以及其上的移動(dòng)數(shù)據(jù)業(yè)務(wù)。 800MHz CDMA 第二代數(shù)字蜂窩移動(dòng)通信業(yè)務(wù)包括以下主要業(yè)務(wù)類型： －端到端的雙向話音業(yè)務(wù)。提供移動(dòng)網(wǎng)國(guó)際通信業(yè)務(wù)，必須經(jīng)過(guò)國(guó)家批準(zhǔn)設(shè)立的國(guó)際通信出入口 2． 800MHz CDMA 第二代數(shù)字蜂窩移動(dòng)通信業(yè)務(wù) 800MHz CDMA 第二代數(shù)字蜂窩移動(dòng)通信（簡(jiǎn)稱 CDMA 移動(dòng)通信）業(yè)務(wù)是指利用工作在 800MHz 頻段上的 CDMA 移動(dòng)通信網(wǎng)絡(luò)提供的話音和數(shù)據(jù)業(yè)務(wù)。 900/1800MHz GSM 第二代數(shù) 字蜂窩移動(dòng)通信業(yè)務(wù)的經(jīng)營(yíng)者必須自己組建 GSM移動(dòng)通信網(wǎng)絡(luò)，所提供的移動(dòng)通信業(yè)務(wù)類型可以是一部分或全部。 －經(jīng)過(guò) GSM 網(wǎng)絡(luò)與智能網(wǎng)共同提供的移動(dòng)智能網(wǎng)業(yè)務(wù)，如預(yù)付費(fèi)業(yè)務(wù)等。 －移動(dòng)承載業(yè)務(wù)以及其上的移動(dòng)數(shù)據(jù)業(yè)務(wù)。 900/1800MHz GSM 第二代數(shù)字蜂窩移動(dòng)通信業(yè)務(wù)包括以下主要業(yè)務(wù)類型： －端到端的雙向話音業(yè)務(wù)。 1． 900/1800MHz GSM 第二代數(shù)字蜂窩移動(dòng)通信業(yè)務(wù) 900/1800MHz GSM 第二代數(shù)字蜂窩移動(dòng)通信（簡(jiǎn)稱 GSM 移動(dòng)通信）業(yè)務(wù)是指利用工作在 900/1800MHz 頻段的 GSM 移動(dòng)通信網(wǎng)絡(luò)提供的 話音和數(shù)據(jù)業(yè)務(wù)。蜂窩移動(dòng)通信業(yè)務(wù)是指經(jīng)過(guò)由基站子系統(tǒng)和移動(dòng)交換子系統(tǒng)等設(shè)備組成蜂窩移動(dòng)通信網(wǎng)提供的話音、數(shù)據(jù)、視頻圖像等業(yè)務(wù)。====T1 溢出中斷 ==== T11:MOV TH1,3CH MOV TL1,0B0H INC R0 RETI END 基于 51 單片機(jī)的 8 路搶答器的設(shè)計(jì) 28 附錄二 單片機(jī)八路智能搶答器原理圖 基于 51 單片機(jī)的 8 路搶答器的設(shè)計(jì) 29 附錄三 英 文 資 料 The principle of Cellular mobile munications Cellular mobile munication is the use of cellular wireless work, wireless channel connections between the Terminal and work equipment, so as to realize the user can municate in the activity. Its main feature is terminal mobility, and having the handoff and automatic roaming capabilities across a local work. Cellular mobile munications services are under the Exchange subsystem by the base station subsystem and mobile devices such as cellular mobile munications works provide voice, data, video, images and other business operations. Cellular mobile munications services include: 9001800MHz second generation GSM digital cellular mobile telemunication business, 800MHz second generation CDMA digital cellular mobile munications services, third generation digital cellular mobile munications business. 1. 900/1800MHZ GSM the second generation of digital cellular business 900/1800MHz short titles of the second generation of GSM digital cellular mobile munications GSM mobile munication business refers to work in the 9001800MHz band of GSM mobile munications works provide voice and data services. Wireless interface of GSM mobile munication system using TDMA technology, core work mobility management protocol MAP Protocol. Over 900/1800mhz GSM the second generation of digital cellular business includes the following major types ： Bi directional voice service end to end. Mobile Messaging service, using the GSM work and launched mobile messaging platform, mobile business of messages received. On the move to hosted business and mobile data services. Mobile supplementary services, such as calling number display, call forwarding business. Common GSM work and intelligent work to offer mobile intelligent work services, such as prepaid services, and so on. Domestic roaming and international roaming service. 900/1800MHZ GSM the second generation of digital cellular business operators of the anization must own GSM mobile munications work, the mobile types can be a part or all. To provide a mobile work of the operators is the same work, with different operators. Provide work pleted between the mobile international business and must be approved by the state of international munications door. 2. 800MHz second generation CDMA digital cellular mobile munications business 800MHz second generation CDMA digital cellular mobile telemunication CDMA mobile munication services for short refers to work on the 800MHz band of CDMA mobile munication work to provide voice and data services. CDMA 基于 51 單片機(jī)的 8 路搶答器的設(shè)計(jì) 30 wireless interface of mobile munication using narrow band CDMA code division multiple access technology, core work mobility management protocol uses IS41 protocols. 800MHz second generation CDMA digital cellular mobile munications services include the following business types : Bi directional voice service end to end. Mobile Messaging service, using CDMA works and mobile messaging platform, mobile business of messages received. On the move to hosted business and mobile data services. Mobile supplementary services, such as calling number display, call forwarding business. CDMA work together with intelligent works to offer mobile intelligent work services, such as prepaid services, and so on. Domestic roaming and international roaming service. 800MHz second generation CDMA digital cellular mobile telemunication business operators must form a CDMA mobile munications work, provided by the mobile munications business types can be part or all of. Provide a work of mobile munications business pass, can be the same operator work, can also be done by works of different operators. Providing international munication services in mobile works, must be approved by the State import and export of international munication. 3. Third generation digital cellular mobile munications business Short titles of the third generation of digital cellular mobile munication 3G mobile munication business refers to the use of third generation mobile munications works provide voice, data, video, images and other business operations. Main features of the third generation of digital cellular mobile munications services is to provide mobile broadband multimedia services, which under the fast moving environment to support 144kbs rate, walking and slow mobile support 384kbs rates, indoor environment supporting 2Mbs rate of data transfer, and to guarantee reliable QoS quality of service. Third generation digital cellular mobile munications business, including the second generation cellular mobile munications can provide all types of business and mobile multimedia services. Third generation digital cellular mobile telemunication business operators must form a 3G of mobile munications work, provided by the mobile munications business types can be part or all of. Provide a work of mobile munications business pass, can be the same ope