如何实现手机的快速拨号

在电话号码不断升位的今天,每个号码已经是一串较长的数字,若拨号时一个个地将其按出,的确得费一番功夫。其实利用手机的一些特殊功能,完全可以实现快速拨号,现以摩托罗拉手机为例,介绍一些快速拨号的方法: 1.利用电话号码本中所存储的号码位置号拨号。如果用户将常用的电话号码存入     

双音频(DTMF)电话的遥控

在美国和德国利用双音频拨号方式的先进性来实现普通电话的遥控拨号,已经逐渐步入家庭。这无疑是普通电话用户的一大福音。现根据国外提供的有关资料将这一实用技术介绍如下。 目前在大多数情况下,人们拨电话时都会听到电话里有哒哒哒的拨号声,这是因为所拨的号码是通过脉冲方式告知电信局。它是直接从过去的圆盘拨号方式派生来的。脉冲拨号方式是用脉冲的个数来传递所拨号码的数字。一个脉冲代表数字1,两个脉冲代表数字2,直至10个脉冲代表数字0。进化到现代按键式电话后,其脉冲就由电路来     

浅析DigitMap在拨号后时延及接通率的作用

在软交换中,号码图表（DigitMap）是驻留在媒体网关（MG,Media Gateway）内,为检测和上报终结点收到的Digit事件,使用户摘机时随拨号音一同下发给MG,并要求用户拨号时,MG用DigitMap来判断用户所拨的号码流是否有效,当检测到的号码串和其中某一列相匹配时就向媒体网关控制器（MGC,Media Gateway Controller）发出通知,利用该描述符MG就可以实现成组发码。通过DigitMap数据与传统NO.7信令的对比,优化DigitMap数据可以缩短用户的拨号后时延,提高接通率。     

由语音操作的程控电话系统

美国Ａｍｅｒｉｔｅｃｈ通讯科技开发公司已研制出一种由语音操作控制的电话系统。该系统的特点是不需要在电话机的终端用户上加装任何设备,只要在电话程控交换中心增设一套语音程控系统即可。这样,每户电话用户最多可以输入存储多达七十组的电话名录号码,用户只需拿起话筒,说出对方号码,语音程控系统则可依据语音自动拨号而接通对方,这种系统已投入商业试用。由语音操作的程控电话系统@远译     

280型数字话音交换机

280型数字话音交换机(DVX)能与200型话音数字化装置相匹配。在保密话音应。用时,则可将Modem和密码机配同该设备使用。该设备具有8条分机线路容量。当把电话机由架上取下时,电话机自动进入拨号方式,然后可按常规方式拨适当的号码,收端设备自动回答并将电话由拨号方式转换到保密方式。在电话连通设备同步之后,呼叫方会听到另一种清晰的拨号声,然后呼叫人拨     

移动通信的基本技术 六、与固定网的连接和交换

1.移动通信网的特点和交换技术在固定网中,用户通过按每个用户设置的线路,以固定的连端接纳入交换机中。因此,在交换转接中,(1)主呼被呼的信号通过各用户的线路进行收发;(2)用户信息根据固定的交换机接纳位置进行检索;(3)根据用户拨号数字便可选择至被呼交换机的路由并确定计费指数。而在移动通信网中,用户是移动的,所以在交换转接方面则不同于固定网,图1示出了移动网所要     

新颖的多通道IP电话智能拨号器

新颖的多通道IP电话智能拨号器能根据用户所拨的号码 ,自动选择合适的通道拨号 ,具备远程遥控参数设置、用户使用权限密码设置等功能。拨号器使用低功耗单片机和DTMF信号收发芯片MT88L89,用户可按使用普通电话的拨号方式使用IP电话     

DMS—100交换机机DRAM的实现

ＤＭＳ—１００交换机机ＤＲＡＭ的实现天津市市内电话局张晓颖当用户拿起话机后久不拨号或没把号拨全，以及所拨的号码是空号等（称之为非正常呼叫）时，ＤＭＳ－１００数字程控电话交换机要给用户送一个特殊的声音或录音通知，以提醒用户进行必要的操作。ＤＭＳ－１００...     

VoIP编号和寻址技术研究与应用

随着IP技术的发展,电信网络提供了VoIP业务,为用户提供了灵活快捷的沟通方式,但VoIP业务终端需要与现有的大量普通非智能固定电话终端拨号互通,需要支持简单的拨号方式。文中介绍了VoIP用户的E．164编号方案和寻址技术,通过选择地理号码方式为VoIP用户编号,结合移动通信的HLR＋VLR寻址技术完成对用户的寻址,实现了VoIP用户移动以及与现有的非智能固定电话终端互通的功能。     

C＆C08交换机切不断双音频拨号音的故障分析

故障现象１ :许多用户申告 ,使用音频拨号时 ,拨号音有时可切断 ,有时无法切断。分析处理 :在故障分析过程中发现 ,这些用户在Ｃ &Ｃ０８交换机内的数据拨号方式均设为ＤＴＭＦ ,可以排除数据设置有误的原因。同时又发现申告的用户所处的范围比较集中 ,都在７#模块的一上机框中。由于双音频收号要经过ＡＳＬ模／数转换 ,传至ＤＲＶ板进行收号 ,因此ＡＳＬ或ＤＲＶ器件故障都可能造成双音收号不正常。因为故障用户相对集中 ,而且双音收号是时好时坏 ,所以可以断定ＡＳＬ板不会有故障 ,故障原因可能是出在ＤＲＶ板上。在监测过程中 ,通过故障…     

动态调整直方图剪枝PDA声控拨号器的应用与实现

以使用嵌入武操作系统PocketPC的个人数字助理（PDA）为实验平台研究了基于非特定人语音命令识别的可定制声控拨号器。针对PDA存绪空问和运算能力的限制，在保证性能的前提下从严格控制搜索空间和提高解码速度出发，提出了结合搜索路径分数差值实时调整剪枝宽度的动态调整直方图剪技策略，提出了利用速查表加速似然计算的方法，并在通过实验验证舌采用较少维数的特征、结合扩展声韵母进行声学建模等措施，有效地解决了上述问题．在实际PDA设备上实验表明，在词表大小为200个人名时，识别正确率达98．70％，而识别速度比采用标准算法的参考系统提高了约80倍，同时节省了约30％搜索存储空间。     

The telephone network of the 1960s

In 1960 the transmission technology of the public switched telephone network was ordinary cable pairs, carrier systems on both paired and coaxial cable, and point-to-point microwave radio systems. Voice signals were frequency multiplexed for efficient transmission, but remained in analog form from end to end of a connection. Electromechanical switching systems provided circuit-switched connections, and about half of the customers could directly dial long distance calls. The following decade saw the beginnings of electronic switching and direct distance dialing on a global basis. Meanwhile, applying digital technology to achieve lower costs and better quality for voice transport began in earnest, and the interconnection of data terminals and computer centers became an increasingly important communications need. The initial data communications approach, still used with ever increasing sophistication and speed, was to convert data to speech-like form with data modems. Later, the direct connection of digital data to digital network facilities became the method of choice for building computer communications networks and the backbone of the Internet. It now appears likely that one day all signals, including voice, will be transported by unified high-speed digital networks with a common set of protocols     

基于数据挖掘和地理可视化的4G/5G语音质量优化研究

传统语音质量优化依赖于现场测试、案例积累和专家经验,以人工试验的方式分析问题,成本高昂且效率低下。通过应用数据挖掘、决策树机器学习算法以及地理可视化等多种技术,开发了基于大数据分析的语音体验优化可视化平台,可有效识别语音大数据中的规律,实现用户语音体验指标与无线网络性能指标关联分析、劣化门限智能识别以及质差区域画像分析等功能,有利于降低网络工程师技能门槛、提升网络优化工作效率、节省网络运维成本,为行业提供精准有效的语音体验提升解决方案。     

Pedestrian navigation with augmented reality,voice and digital map: final results from an in situ field study assessing performance and user experience

This paper reports on a field study comparing navigation performance and user experience of voice, digital map and augmented reality (AR) interfaces for electronic assistance in the context of pedestrian navigation. The in situ study was conducted with two subsequent experiments in the city of Salzburg along a pre-defined route using a self-implemented smartphone application running on Apple's iPhone 4. The study involved 48 participants aged between 22 and 66 years with different experiences in using smartphones and navigation systems. Navigation performance was measured on a micro-level including information on effectiveness (number and reasons of stops, global positioning system (GPS accuracy), efficiency (walking and task completion time, duration of stops) and satisfaction (NASA Task Load Index, System Usability Scale). A final questionnaire completed the study. Between the first and the second experiment, the application was adapted considering user feedback and the previous findings. Results show that in the context of GPS-enhanced pedestrian navigation, digital map and voice-only interfaces lead to significantly better navigation performance and user experience in comparison to AR interfaces. The study also reveals similar results for digital map and voice-only interfaces given that voice instructions are carefully composed. Results lead to the conclusion that AR is still suffering from usability and hardware issues leading to higher uncertainty of navigating persons. Best navigation performance and user experience can be achieved by combining digital maps and accurate voice instructions.     

CR–RSS location algorithm for primary user in cognitive radio简

This article introduces the classic locating method based on the receiving signal strength in the cognitive radio and puts forward a cognitive radio-receiving signal strength（CR-RSS） localization algorithm which solves the problem of secondary users locating the primary user and succeeds in estimating the primary user＇s location and transmission power. Through the establishment of cognitive radio network, evaluating the number of secondary users,sampling and the environmental factors to the results in CR-RSS approach. The consequence shows that this approach can effectively locate the primary user and the technology of localization in cognitive radio can assist network optimization.     

面向FTTH规模部署的单话音终端技术及其应用

随着国内FTTH网络的大规模发展和大量宽带用户向FTTH的迁移,单话音用户的FTTH接入成为一个重要问题.现有的FTTH终端体系需要进一步发展和完善.本文在对现有各类FTTH终端分析的基础上,研究了单话音终端的需求,在现有的SFU和HGU终端体系上提出了1FE+1POTS SFU的单话音终端方案.最后,本文对单话音终端的应用模式做了系统的阐述,并对其应用前景做了预测.     

语音识别技术在电话语音自动拨号中的应用

给出了一种应用于电话语音自动拨号的实时语音识别方法。该系统对特定人的语音进行识别,并将识别结果映射成相应的电话号码。实验结果表明该方法具有很高的识别精度和实时的识别速度,并且只需很小的内存空间就可以实现,是一种有效的应用于电话语音自动拨号等方面的语音识别方法。     

语音与短信混合场景下的掉话问题分析

针对用户拨打10086(112)查询"增值业务"、接收短信场景下出现掉话现象,利用信令监测系统进行信令分析,发现其连续多次的重复业务当中均暴露出不同的网络机制或隐性问题.对其反映出的多样问题进行整理,并附注相关信令特征说明,对于"语音+短信"混合场景下的业务分析具有一定的参考价值.     

A hybrid architecture for analog video broadcast and B-ISDNservices in customer premises networks

The use of SCM (subcarrier multiplexing) transmission to deliver broadcast analog video signals within a CPN (customer premises network) as an overlay to an all-digital B-ISDN (broadband integrated services digital network) is considered. The feasibility of a proposal where the analog and digital signals are carried on different wavelengths is shown. An architecture for an optical CPN, termed H-Bus and incorporating emerging broadband SONET and ATM (asynchronous transfer mode) standards, is taken as a baseline for the delivery of switched digital, two-way voice, data, and video services. An optical overlay for the distribution of analog, broadcast video services using subcarrier multiplexing is considered. Several key alternatives associated with the delivery of broadcast video services are assessed, including signal quality, number of simultaneous channels, number of user terminals to be served, and modulation format. These issues are considered in terms of their impact on the interface with the public local exchange network and on the complexity, topology, and cost of the CPN     

精细化流量经营业务支撑系统的研究与设计

随着智能终端技术的发展,移动运营商传统话音业务增长逐渐趋于稳定,数据流量业务增长明显,但是与之对应的业务收入并没有呈现出相关的增长态势。面对流量经营带来的新业务模式、新用户体验和新网络架构,如何满足快速增长的移动互联网业务需求成为移动运营商建设业务支撑系统面临的关键挑战。本文主要研究面向流量经营的流量计费策略和经分应用模型的制定,结合终端、业务、网络等维度分析数据业务用户的属性及行为特征,为精细化流量经营活动提供业务支撑手段。