标签: dsl
相关资源
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基于可编程DSP的DSL芯片生产流水线系统的测试
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基于可编程DSP的DSL芯片生产流水线系统的测试
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技术资料：电脑网络－网络基础--DSL错误代码
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技术资料：电脑网络－网络基础--DSL线路分析
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Telcosfaceagrowingchallengefromtheircompetitorsinthecabletelevisionoperatorandwirelesstelephoneindustries.Metropolitancableserviceoperators(MSOs)offernewInternetaccessandvoiceoverIP(VoIP)telephoneservices—alongwithdigitalvideoandtelevision—thatencroachonthemarketandrevenueoftelcos.Andconsumersarechoosingtheconvenienceofpersonalwirelesstelephonesovertraditionalwirelineservice.Telcosneedacompetitiveedgethatleveragestheirindustry-leadingpositionwithbroadbanddigitalsubscriberline(DSL)technologytooffernewservicesthateffectivelycompetewithcableandgivethemnewrevenueopportunitieswiththeircustomers.TheIPvideoservices(IPTV)marketpresentsattractiverevenue-generatingforecasts,andanewvideocompressionstandard,H.264/AVC,enablesacompellingsolutionfortelcostoengageinIPTV.……
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在传统的网络中，测试工作一般都是定期在POTS线路的某些工程阶段中或特定失误发生时才会进行。过去所采用的方法是透过POTS线路卡(linecard)继电器矩阵(relaymatrix)的方式，把外部测试服务器连接到中央测试头端。随后取而代之的则是，以更先进的POTS芯片组内建之完整测试机制来负责，并藉此省下购置具有继电器矩阵的昂贵测试头端(testheads)。不论是哪一种方式，都可以在三十秒内找出线路的问题，并且得知其传输质量是否符合要求，或者其讯号端点的情形，像是短路、开路，或断路等。……
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随着宽带接入的到来，许多公司已经开发出了高高压SLIC（用户线路接口卡），控制振铃和语音传输电话系统。SLIC组件基本上执行两个功能。一个正在振铃手机客户的处所。另一种是摘机操作回路电流产生。SLIC组件的电源有特殊要求。Maxim>AppNotes>BatteryManagementPower-SupplyCircuitsKeywords:SLIC,subscriberlineinterfacecard,SLICpowersupply,REN,broadband,DSL,cablemodem,powersupplycontrollerNov12,2001APPLICATIONNOTE850FlybackCircuitPowersBroadbandPhoneNetworksWiththeadventofbroadbandaccess,manycompanieshavedevelopedhighvoltageSLICs(subscriberlineinterfacecard)whichcontroltheringingandvoicetransmissiononphonesystems.TheSLICsessentiallyperformtwofunctions.Oneisringingthephoneatthecustomer'spremises.Anotherisgeneratingloopcurrentforoff-hookoperation.PowersuppliesforSLICshavespecialrequirements.MultipleLine,MultiplePhoneApplicationsPowerRequirementsTheequivalentcircuitforaUSringer,attheringerfrequencyo……
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USB-PoweredDSLModemSupply……
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Thiscircuitconvertsanunusedlinear-regulatoroutputtoawatchdogtimerformonitoringsoftwareexecution.……
