GBT 2900.68-2005 电工术语 电信网、电信业务和运行.pdf 24页

'ICS01.040.33M04中华人民共和国国家标准GB/T2900.68-2005/IEC60050-715:1996电工术语电信网、电信业务和运行Electrotechnicalterminology-Telecommunicationnetworks,teletrafficandoperation(IEC60050-715:1996InternationalelectrotechnicalvocabularyChapter715:Telecommunicationnetworks,teletrafficandoperation,IDT)2005-10-10发布2006-06-01实施中华人民共和国国家质量监督检验检疫总局发布中国国家标准化管理委员会 GB/T2900.68-2005/IEC60050-715:1996目次一前言1范围·‘···············，·····························，，，，，·········，··············，·································⋯⋯12术语和定义···········································，，···························，···‘·························⋯⋯12.1基本术语·············································，··························，·····························、⋯12.2资源..................................·········，································································，·⋯32.3呼叫·························.........................................................·············，·········⋯⋯42.4时间和时延···，·································，，·······················································⋯⋯62.5业务量·····························‘··，······，··，，，···················，，··································，，·⋯62.6电路群············································，，，，·······················································，，·⋯82.7业务量工程·，·········，·，，·····，···················，，·······················································⋯⋯92.8网络·····························，··················，················································，··········⋯⋯102.9电路交换网···························································································，·····⋯⋯122.10消息交换网·················································································............⋯⋯132.11分组交换网·······，，，，·，，。·····1·，，，，，，，···············1···，················，·······⋯⋯，二·13中文索引··············································，·，·························，，，····························⋯⋯14英文索引······················，····························，························································⋯⋯17 GB/T2900.68-2005/IEC60050-715:1996NO吕本部分为GB/T2900的第68部分，等同采用国际电工委员会IEC50(715):1996《国际电工词汇电信网、电信业务和运行》。术语的条目编号与IEC50(715):1996保持一致。本部分由全国电工术语标准化技术委员会提出。本部分由全国电工术语标准化技术委员会归口。本部分起草单位:信息产业部电信传输研究所。本部分的主要起草人:续合元、吴宏建。 GB/T2900.68-2005/]EC60050-715:1896电工术语电信网、电信业务和运行范围GB/T2900的本部分规定了电信网中使用的常用电信术语和这些术语的定义。本部分适用于电信标准中的使用和引用。2术语和定义下列术语和定义适用于本部分。2甲1基本术语715-01-01通信communication根据约定进行的信息传送。715-01-02传输信道transmissionchannel两点间在单方向上传输信号的手段。715-01-03[电信〕电路(telecommunication)circuit两点间允许双向传输的两个传输信道(715-01-02)的组合。注1:如果通信是单向的，则术语“电路”有时用于指单个传输信道，但是不赞成这种用法注2:在电话学中，术语“电话电路”通常只限于指直接连接两个交换中心的电信电路。715-01-04链路!ink两点间具有规定特性的通信手段。715-01-05电信网telecommunicationnetwork在一些接人到电信业务的设备所在的位置之间，提供这些电信业务的所有手段。注网络的内部结构可允许标识网络的不同部分，每一部分与特定的业务或一组业务有关715-01-06终端terminal连接到电信网(715-01-05)的设备，它提供一种或多种特定业务的接人注1:终端可以是，例如用户终端，提供业务的终端或在电信网之间作为接口的终端注2:终端可能必须根据所进行的业务翻译从网络中接收到的或者是向网络发送的信号。715-01-07连接connection传输信道(715-01-02)或电信电路(715-01-03)、交换单元和其他功能单元的临时性关联，用来在电信网中的一个或几个点间传送信息。注根据关联的持续时间，连接可以分为交换连接、半永久连接或永久连接715-01-08交换switching为提供所希望的电信设施，暂时关联功能单元、传翰信道(715-01-02)或电信电路(715-01-03)的1 GB/T2900.68-2005/IEC60050-715:1996过程。715-01-09交换局exchange;switchingunit;switchingentity;switchingoffice电信网中一个节点的交换(715-01-08)设备和辅助设备的集合，能使连接(715-01-07)按照用户的要求建立。715-01-10单向「的」(1)unidirectional属于只能在预先安排的单方向上传送用户信息的链路(715-01-04)0注:这个术语不应用于描述呼叫建立的方向715-01-11双向仁的〕(1)bidirectional属于能同时在两点间的两个方向上传送用户信息的链路(715-01-04).注1:在两个方向上的传输信道(715-01-02)的容量和信令率不必相同。注2:这个术语不能应用于描述呼叫建立的方向。715-01-12单向[的](2)one-way属于呼叫建立总是在一个方向上发生的运行模式。注:这个术语不应用于描述传送用户信息的方向。715-01一13双向仁的〕(2)two-way;bothway属于呼叫建立在两个方向上发生的运行模式。注1:在两个方向上的业务流量不必相同。注2这个术语不应用于描述传送用户信息的方向。715-01-14信令(电信)signalling(intelecommunication)与电信网(715-01-05)中的呼叫(715-03-02)建立、监控和与网络管理有关的信息交换715-01一15地址address在网络中的某一点确定被叫方位置的数字和其他可能字符的总和，或者是前向选路所必需的数字。注，由主叫方发送的包含地址信息的数字，在连接逐步建立的过程中，可能会由于地址翻译和(或)数字吸收而被改变，但是每一点的翻译后的和(或)余留的数字构成了这点的地址信息。715-01-16公用电信网publictelecommunicationnetwork任何人都可以成为这个网所提供的业务的用户(715-02-02)的电信网(715-01-05),715-01一17专用电信网privatetelecommunicationnetwork向确定的一组用户提供业务的电信网(715-01-05)，它可以也可以不连接到公用电信网(715-01-16)0715-01一18可闻指示audibleindications通过电话机的接收器向电话网中的用户(715-02-02)实时提供任何听得见的信息，例如音或留言，这些信息与建立、保持和释放呼叫有关。715-01一19电信业务teletraffic涉及电信业务f(715-05-01)的研究领域。2 GB/T2900.68-2005/IEC60050-715:19962.2资源715-02-01资源resource任何物理或概念上可识别的实体，它的用途和状态能在任何时候被明确地确定。715-02-02用户user电信网(715-01-05)外的利用网络服务进行通信的任何人或机器。715-02-03占用请求bid获得相关资源的服务的尝试。注:在网络管理中，如果未加限制则意味着对电路群(715-09-06)，路由或目的地的一次占用请求。715-02-04占用seizure成功的占用请求(715-02-03).715-02-05自由仁的」free属于现在没有使用但可供使用的资源(715-02-01)715-02-06空闲[的〕idle属于现在没有使用也没有故障的资源(715-02-01),注:空闲的资源或者是自由(715-02-05)的资源，或者是闭塞(715-02-08)的资源。715-02-07忙[的〕busy属于现在正使用或预留的资源(715-02-01)0715-02-08闭塞〔的〕blocked;busiedout属于有意使之不可用的资源(715-02-01)0715-02-09释放release资源(715-02-01)状态从忙(715-02-07)到空闲(715-02-06)的转变715-02-10保持时间holdingtime资源(715-02-01)从占用(715-02-04)到释放(715-02-09)的时间.715-02-11服务时间servicetime资源(715-02-01)服务于某个给定需求的累积时间注:如果服务时间是不间断的，那么它与保持时间一致.715-02-12损失操作模式lossmodeofoperation当不能立即找到合适的自由(715-02-05)资源(715-02-01)时拒绝占用请求(715-02-03)的操作模式。715-02-13延时操作模式delaymodeofoperation当不能立即找到合适的自由(715-02-05)资源(715-02-01)时允许占用请求(715-02-03)等待的操作模式。 GB/T2900.68-2005/IEC60050-715:1996715-02-14等待时间waitingtime排队时间queuingtime在延时操作模式(715-02-13)下，从对某资源(715-02-01)的占用请求(715-02-03)到占用(715-02-04)或放弃占用请求之间的间隔时长。715-02-15闭塞blocking拥塞congestion占用请求(715-02-03)不能立即导致占用(715-02-04)时资源(715-02-01)池的状态。注:如果在一定的时延之后或通过使用替换的资凉能够建立呼叫(715-03-02)，则闭塞不一定导致试呼(715-03-01)的损失。715-02-16内部闭塞internalblocking在给定的人口和希望的出口池中的至少一个自由出口之间不能建立连接(715-01-07)时，多级交换(715-01-08)网的状态。715-02-17外部闭塞externalblocking由于出口池中的所有出口被占用，给定的人口和希望的出口池之间不能建立连接(715-01-07)时，多级交换(715-01-08)网的状态。715-02-18时间拥塞timecongestion一个特定资源池中不包含任何自由(715-02-05)资源(715-02-01)的概率，它由在规定的时间间隔内这些资源完全被占用的时间所占的比例来估算。715-02-19呼叫拥塞callcongestion不能立即转化为占用(715-02-04)的对特定资源的占用请求(715-02-03)在所有的占用请求中所占的比例。它由在规定的时间间隔内不成功的占用请求和所有占用请求的比来估算。注:呼叫拥塞也可以称为“损失率”.715-02-20应答占用比answerseizureratioASR(缩写词)对给定的电路群(715-09-06)或目的地(715-05-13)码，在规定的时间间隔内产生应答信号的占用(715-02-04)数与总的占用数的比。注:在网络的某些点，由于自动重复试呼，这个比可能比完成率(715-03-12)低。715-02-21应答占用请求比answerbidratioABR(缩写词)对于给定的电路群(715-09-06)或目的地(715-05-13)码，在规定的时间间隔内产生应答信号的占用请求(715-02-03)数和所有占用请求数的比。注:在网络的某些点，由于不成功的占用请求，这个比值可能比应答占用比(715-02-20)低。2.3呼叫715-03-01试呼callattempt GB/T2900.68-2005/IEC60050-715:1996电信网(715-01-05)用户(715-02-02)的单序列操作，试图接通所要的用户、终端(715-01-06)或服务。注1:这一序列的操作在合适的悄况下是够用的，但是在例如闭塞、故障等情况下就不够用。注2;在网络中的给定点，试呼表现为单个不成功的占用谕求(715-02-03)或一个成功的占用请求及其后续的一切关于建立连接的可辨识的活动。715-03-02呼叫call试呼(715-03-01)之后的一个完整连接(715-01-07)的建立和使用。715-03-03呼叫意向callintent对于给定的电信网(715-01-05)用户(715-02-02)，向给定用户、终端或服务建立呼叫的意向。注:正常情况下呼叫意向表现为一个或几个试呼(715-03-01)然而试呼可能被用户抑制或延迟，例如在他预计到质量差的服务的时候.715-03-04第一次试呼firstcallattempt与给定的呼叫意向(715-03-03)有关的到达网络给定点的第一次尝试。715-03-05孟复试呼repeatedcallattempt,reattempt与给定的呼叫意向(715-03-03)有关的第一次试呼(715-03-01)之后的任意一个后续试呼。注:重复试呼可以是自动的，即使第一次试呼是手动的。715-03-06呼叫串callstring与给定呼叫意向(715-03-03)有关的所有试呼(715-03-01),715-03-07放弃试呼abandonedcallattempt主叫用户中止的试呼(715-03-01)0715-03-08闭塞试呼blockedcallattempt由于网络缺乏资源，不能立即满足的试呼(715-03-01),715-03-09损失试呼lostcallattempt由于网络缺乏资源、或者由于网络中的错误或失效，而失败的试呼(715-03-01),715-03-10成功试呼successfulcallattempt;fully-routedcallattempt能使主叫用户接收到关于被叫用户状态以及建立连接(715-01-07)可能性的可懂性信息的试呼(715-03-01),715-03-11完成试呼completedcallattempt;effectivecallattempt产生应答信号的成功试呼(715-03-10)0715-03-12完成率completionratio;efficiency在网络中的给定点和规定的时间段内完成试呼(715-03-11)数与试呼总数的比。715-03-13呼叫强度callintensity GB/T2900.68-2005/IEC60050-715:1996规定的时间间隔内的试呼(715-03-01)数除以这个间隔时长。注:呼叫强度指一个或另一方向的呼叫建立或双向的总和。2.4时间和时延715-04-01拨号音时延dial-tonedelay从摘机到收到拨号音之间的间隔时长。715-04-02拨号时间dialingtime从主叫用户接收到拨号音到拨号结束之间的间隔时长。715-04-03入局响应时延incomingresponsedelay当信号在语音信道中作为语音发送或在永久性关联的信令信道中发送时，从占用(715-02-04)信号到达的时刻到回送进行发送信号的时刻之间的时长。715-04-04交换局呼叫建立时延exchangecallset-updelay交换局(715-01-09)的人局侧接收到建立呼叫所需要的地址信息，到向后续交换局发送占用信号或开始发送地址信息之间的间隔时长。715-04-05直通连接时延through-connectiondelay交换局在得到建立直通连接所要求信息的时刻，到建立了网络直通连接的时刻之间的时长。715-04-06拨号后时延post-diallingdelay用户拨号结束时刻到用户接收到适当的声音、录音通知或到无语音的放弃试呼(715-03-01)时刻之间的时长。715-04-07应答时延answeringdelay主叫用户和被叫用户间连接(715-01-07)的建立，到始发交换局(715-01-09)检测到应答信号之间的时长。25业务.715-05-01业务f(电信)traffic(intelecommunication)电信网(715-01-05)或电信网的一部分中的试呼(715-03-01)、呼叫或消息的集合。注:当被考虑的部分是一特殊的资源(715-02-01)池时，业务量现象就变为关于对某一资源的占用请求(715-02-03),占用(715-02-04)和占用直到释放，或不成功的占用请求的消失等资源状态的演变进程715-05-02业务f强度trafficintensity在一个特定资源(715-02-01)池中同时忙(715-02-07)的资源数。注:业务量强度的单位是厄兰715-05-03携载业务ftrafficcarried特定资源(715-02-01)池所服务的业务f(715-05-01),715-05-04业务f负荷trafficload GB/T2900.68-2005/IEC60050-715:1996携载业务量[强度」trafficcarried(intensity)特定资源(715-02-01)池所服务的业务2(715-05-01)的业务2强度(715-05-02).注:实际的作法是，把业务量估算为在规定的时间间隔，如忙时内的平均。715-05-05提供业务2trafficoffered若用户的使用不受到资源(715-02-01)池的大小的限制，资源池的用户所能够产生的业务2(715-05-01).715-05-06厄兰erlangE业务2强度(715-05-02)的单位，它对应于对一个资源(715-02-01)的占用。715-05-07溢出业务2overflowtraffic提供给资源(715-02-01)池的业务量中的一部分，这一部分没有被它携载，而是提供给其他资源。715-05-08闭塞业务2blockedtraffic溢出业务2(715-05-07)中没有被其他资源携载的部分。注:“损失的业务量”一语仅局限于损失操作橄式(715-02-12),因而不应当看作是本术语的同义词715-05-09放弃业务2abandonedtraffic闭塞业务2(715-05-05)中没有产生重复试呼(715-03-01)的部分。注:鉴于与损失操作模式(715-02-12)的通用定义产生馄淆的可能性，这个术语不应称为“损失的业务量”715-05-10抑制业务2suppressedtraffic当用户在特定的时间预计服务质2(715-07-14)差时，用户所抑制的业务量。715-05-11业务2V0trafficvolume业务.强度(715-05-02)在给定时间间隔内的积分。注1:给定资源池的业务量积等于各个资源保持时间的和.注2:业务量积的单位是厄兰一小时(表示符号:Eh),715-05-12始发地origin(ofacallattempt)网络中主叫方的位置。注:始发地可按符合于情况的准确度规定.715-05-13目的地destination(ofacallattempt)网络中被叫终端点的位置。注:根据地址(715-01-15)信息的相关部分，目的地可按任何一种符合情况的准确度规定。715-05-14点到点业务2point-to-pointtraffic业务量包trafficparcel从特定始发地(715-05-12)到特定目的地(715-05-13)的业务量。7 GB/T2900.68-2005八EC60050-715:1996715-05-15业务19阵trafficmatrix与许多始发地(715-05-12)和目的地(715-05-13)之间点到点业务1(715-05-14)相关的业务f强度(715-05-02)的矩阵715-05-16峰值因数peakednessfactor业务f强度(715-05-02)分布中方差和平均值的比。715-05-17平滑业务fsmoothtraffic峰值因数(715-05-16)小于1的业务量。715-05-18峰值业务fpeakedtraffic蜂值因数(715-05-16)大于1的业务量。715-05-19泊松业务iPoissontraffic随机业务量randomtraffic资源(715-02-01)的占用请求(715-02-03)遵守泊松过程的业务量。注:峰值因数(715-05-16)等于1的业务量为泊松业务量715-05-20等效随机业务f强度equivalentrandomtrafficintensity理论的泊松业务f强度(715-05-02)，当它被提供给理论的电路群(715-09-06)时，它产生的溢出业务量强度分布的平均值和方差分别等于给定的提供业务量的平均值和方差。注:等效随机业务量强度的概念使以间接方式考虑业务量方差成为可能;理论的电路群被称为“等效随机电路群”2.6电路群715-06-01首选电路群firstchoicecircuitgroup作为第一优先级来携载给定的点到点业务1(715-05-14)的电路群(715-09-06)0715-06-02高效电路群highusagecircuitgroup在工程配置中能够将提供给它的业务量溢出到其他一个或几个群的电路群(715-09-06)}715-06-03最终电路群finalcircuitgroup接收溢出业务1(715-05-07)而不再溢出这些业务量的电路群(715-09-06).715-06-04满供电路群fullyprovidedcircuitgroup对于给定的点到点业务1(715-05-14)，既是首选电路群又是终选电路群的电路群(715-09-06),715-06-05终选电路群lastchoicecircuitgroup对于给定的点到点业务2(715-05-14)，没有溢出可能性的电路群(715-09-06)注:终选电路群是.终电路群(715-06-03)或满供电路群(715-06-04)o715-06-06等效随机电路群equivalentrandomcircuitgroup与等效随机业务f密度(715-05-20)相关的电路群(715-09-06)0 GB/T2900.68-2005/IEC60050-715:19962.7业务19工程715-07-01路由(交换)route(inswitching)在两个指派的交换局(715-01-09)或终端点(715-08-02)之间业务19(715-05-01)的潜在通道(715-08-08)。注:通道不一定是单个的电路群，虽然它常常如此.715-07-02基本路由primaryroute首选路由firstchoiceroute在两个指派的交换局(715-01-09)或终端点(715-08-02)之间首先选择的路由。715-07-03迁回路由alternativeroute;alternateroute在两个指派的交换局(715-01-09)或终端点(715-08-02)之间第二或后续选择的路由715-07-04链chain对于给定的点到点业务且(715-05-14)，从始发交换局(715-01-09)连接到目的地交换局的潜在通道(715-08-08)0通常情况下要受，例如最大中间节点数或给定选择次序的限制。注:当始发节点和目的地节点之间存在多于一条的链时就可能实现网络优化.715-07-05链流chainflow从始发节点到目的地节点在给定链(715-07-04)上所携载的业务量。715-07-06网络簇networkcluster一个最终电路群(715-06-03)和所有的特定的高效电路群(715-06-02)的组合，这些高效电路群至少有一个点到点业务19(715-05-14)将最终电路群作为最后选择的路由。715-07-07忙时busyhour在完全给定的期间内携载业务19(715-05-03)或试呼(715-03-01)数最大、且持续时间为一个小时的时间间隔。715-07-08峰值忙时peakbusyhour,bouncingbusyhour-,postselectedbusyhour连续24小时内的忙时(715-07-07)注:每天的峰值忙时可以是不一样的。715-07-09平均日忙时业务19强度averagedailypeakhourtrafficintensity几天来忙时携载业务量强度的平均值。715-07-10平均忙时meanbusyhour时间一致性忙时timeconsistentbusyhour指每天开始时刻相同的持续时间为一个小时的时间间隔，并且要求在这个时间间隔内，几天内的携载的业务量强度的平均值最大。715-07-11日忙时比daytobusyhourratio9 GB/T2900.68-2005/IEC60050-715;1996连续24小时的业务且积(715-05-11)与忙时业务量积的比。注:也可以使用“忙时对日比”715-07-12有效业务19effectivetraffic仅指对应于成功呼叫(715-03-02)中的会话部分的业务量。715-07-13服务等级gradeofservice业务量工程中一个量的值，用来衡量一组资源在规定的条件下对业务量进行携载的胜任度。注这可以是超时筱盖的比例，损失的概率，拨号音时1(715-04-01)等。715-07-14服务质19qualityofservice服务性能的综合效果，它决定了用户(715-02-02)的满意程度。注:这些特征性能，举例来说，可能与传输质量、拨号音时延、失效、故降的频率和持续时间有关。715-07-15始发业务19originatingtraffic由给定的网络内的源产生的不论其发向何处的R务19(715-05-01),715-07-16终接业务19terminatingtraffic到达位于给定的网络内的目的地的不论其来自何处的业务19(715-05-01)0715-07-17内部业务19internaltraffic从给定的网络内的源到该网络内的目的地的业务19(715-05-01),715-07-18入局业务!incomingtraffic由给定网络外的源产生，但使用该网络的资源(715-02-01)的业务19(715-05-01).注:目的地可能在给定网络的外部或在内部，这分别对应于转接业务1(715-07-20和终接的入局业务量。715-07-19出局业务19outgoingtraffic使用给定网络的资19(715-02-01)，但目的地(715-05-13)是在这个网络外的业务19(715-05-01),注:源可能在网络外部或内部，这分别对应于转接业务1(715-07-20和始发的出局业务量715-07-20转接业务19transittraffic使用给定网络的资源(715-02-01)的由网络外的源产生且目的地也是在网络外的业务量。715-07-21本地业务19localtraffic在同一本地服务区或基本计费区内的内部业务量。715-07-22业务19分布不平衡trafficdistributionimbalance业务量负荷不平衡trafficloadimbalance在相似的资源之间携载业务19(715-05-03)的不均匀的分布。2.8网络715-08-01电信网体系结构architectureofatelecommunicationnetwork10 GB/T2900.68-2005/lEC60050-715:1996从不同视点考虑时，能在给定的电信网(715-01-05)中被区分的功能或物理结构的组合。715-08-02终端点terminalpoint电信网(715-01-05)中可以连接终端(715-01-06)的点。715-08-03交换网switchednetwork一种电信网(715-01-05)，在这种电信网中，从主叫终端(715-01-06)到至少一个被叫终端的连接(715-01-07)的建立要求能通过分析由主叫终端提供的地址(715-01-15)礴定被叫终端，并且能通过交换建立联接这些终端的传输信道(715-01-02)，而且所建立的传输信道能够持续一段时间。715-08-04信令网signallingnetwork用于电信网(715-01-05)中交换(715-01-08)节点之间的公共信道信令的网络。715-08-05同步网synchronizationnetwork在电信网(715-01-05)中，为了确保数字交换和数字传输设备的时钟速率与网络频率或/和时间基准一致而设置的一种网络，由节点(时钟)与链路(定时链)组成。715-08-06节点node电信网(715-01-05)中，两条或多条链路(715-01-04)相互连接的任何一个点。715-08-07分支branch电信网(715-01-05)中，两个节点(715-08-06)或终端点(715-08-02)之间没有任何中间节点的的一条链路(715-01-04).715-08-08通道path电信网(715-01-05)中，两个节点(715-08-06)或终端点(715-08-02)之间的分支(715-08-07)序列。必要时要经过其他节点。715-08-09交换节点switchingnode电信网(715-01-05)中，发生交换(715-01-08)的节点(715-08-06),715-08-10交换中心switchingcentre电信网(715-01-05)中，包含一个或多个交换局(715-01-09)的节点(715-08-06),注:辅助的交换单元除外。715-08-11本地交换局localswitchingexchange服务连接交换局servingconnectionexchange一种交换局，任何时候连接到该交换局的给定的一组终端(715-01-06)中的任何一个在参与通信时，该交换局都必定处于工作状态;这种交换局通常提供特定终端信令和其他类型信令间的接口。注:至少有一个，通常也只有一个本地交换局通过一组平行线和给定的终端相连。715-08-1z接入线accessline用户线subscriber"sline11 GB/T2900.68-2005/IEC60050-715:1996用户环路subscriber"sloop连接线connectionline用户驻地的设备和本地交换局(715-08-11)之间的链路(715-01-04)，包括终接设备。715-08-13辅助交换单元auxiliaryswitchingunit指与给定接入线(715-08-12)组中的接人线相连接的交换(715-01-08)设备，其用途在于在这个设备和本地交换局(715-08-11)之间使用较少的业务电路(715-09-05),注:辅助交换单元可以是分支交换局，集线器或共享线设备。715-08-14转接交换局transitexchange转接中心transitcentre主要用于从一些交换局向其他交换局转接业务量的交换局(715-01-09)注:它也可以起本地交换局(715-08-11)的作用。2.9电路交换网715-09-01电路交换circuitswitching一种交换类型，包括终端(715-01-06)、传输信道(715-01-02)或电信电路(715-01-03)间的相互连接，能在一个呼叫或服务期间为用户(715-02-02)提供专用的连接。715-09-02电路交换网circuitswitchingnetwork在每一个呼叫期间基于专用要求而建立连接(715-01-07)的电信网(715-01-05).715-09-03业务且选路计划trafficroutingplan为管理电路交换网(715-09-02)中的连接(715-01-07)而建立的一套规则注:这些规则确定(除其他事项外):—每一个交换局(715-01-09)的类别;—在两个电路交换的交换局之间互连的电路群，以及接入线(715-08-12)群;—在参与其中的终端点之间，对于每一个呼叫，至少有一条可能的路由。715-09-04电路交换单元circuitswitchingunit以电路交换(715-09-01)模式工作的交换单元。715-09-05业务电路trafficcircuit可用于连接(715-01-07)的电信电路(715-01-03),715-09-06电路群circuitgroup中继群trunkgroup具有相同选择标准的一群业务电路(715-09-05),715-09-07电路子群circuitsubgroup具有相似特征，例如信令(715-01-14)类型、传输通道(715-08-08)类型的一部分电路群(715-09-06),715-09-08线路群linegroup12 GB/T2900.68-2005/IEC60050-715:1996在给定终端(715-01-06)和本地交换局(715-08-11)之间具有相同选择标准的一群接入线(715-08-12),715-09-09线群大小groupsize电路群(715-09-06)中的电路数或线路群(715-09-08)中的线路数。715-09-10业务9选路trafficrouting根据给定的规则，对电路群(715-09-06)进行选定，使之能为给定的试呼(715-03-01)建立一个以给定的交换局为起点的连接(715-01-07)e715-09-11交换局类别classofanexchange分配给用于业务9选路(715-09-10)的交换局(715-01-09)的类别。注:例如本地交换局，转接交换局715-09-12入局电路incomingcircuit对于给定的交换局(715-01-09)，仅用于入局业务9(715-07-18)的业务电路(715-09-05),715-09-13出局电路outgoingcircuit对于给定的交换局(715-01-09)，仅用于出局业务9(715-07-19)的业务电路(715-09-05)0715-09-14双向电路both-waycircuit;two-waycircuit对于给定的交换局(715-01-09)，或者用于入局业务9(715-07-18)或者用于出局业务9(715-07-19)的业务电路(715-09-05).2.10消息交换网715-10-01消息交换messageswitching在电信网(715-01-05)内，通过在某些节点上对消息进行创建、接收、存储(如果需要)和前转，从而完成对完整消息的选路的过程。715-10-02消息交换网messageswitchingnetwork;storeandforwardswitchednetwork工作在消息交换(715-10-01)模式下的电信网(715-01-05),2.11分组交换网715-11-01分组交换packetswitching在电信网(715-01-05)内消息的选路过程:消息首先分割为寻址的分组;在网络的某些节点，这些分组被接收、存储，然后在适当的传输信道(715-01-02)中前转;在接收端，把接收的分组重新组成消息。715-11-02分组交换网packetswitchingnetwork工作在分组交换(715-11-o1)模式下的电信网(7is-of-os>a cB/T2900.68-2005八EC60050-715:1996中文索引电信业务715-01一19厄兰715-05-06放弃试呼·········，····················⋯⋯715-03-07B放弃业务f·····‘·····················⋯⋯715-05-09保持时间715-02-10分支·············。··，，················⋯⋯715-08-07本地交换局715-08-11分组交换，’··························⋯⋯715-11-01本地业务f...。···.......⋯⋯，，，，.715-07-21分组交换网·······，，，，······‘-。。···一715-11-02闭塞〔的口··············⋯⋯，........⋯⋯715-02-08峰值忙时·········，，·，·············⋯⋯715-07-08闭塞715-02-15峰值业务f··························⋯⋯715-05-18闭塞试呼···················..........⋯⋯715-03-08峰值因数·····························⋯⋯715-05-16闭塞业务t············..·.·.........⋯⋯，715-05-08服务等级······························⋯⋯715-07-13拨号后时延·············⋯⋯卜......⋯⋯715-04-06服务连接交换局···，···················一715-08-11拨号时间715-04-02服务时间············，················⋯⋯715-02-11拨号音时延···········.⋯⋯，.....⋯⋯715-04-01服务质f········，···，，，················一715-07-14辅助交换单元······················⋯⋯715-08-13成功试呼······························⋯⋯715-03-10重复试呼····················，·········⋯⋯715-03-05高效电路群715-06-02出局电路······························⋯⋯715-09-13公用电信网715-01-16出局业务f...·········。·····，，甲，，，，，·⋯715-07-19传输信道·····.···················⋯⋯715-01-02呼叫··············，，···················⋯⋯715-03-02呼叫串·......................................715-03-06单向「的](1)························⋯⋯715-01-10呼叫强度···············⋯⋯，’。····⋯⋯715-03-13单向[的」(2)··············，·····。···⋯⋯715-01-12呼叫意向·······。·，··················⋯⋯715-03-03等待时间························，··，·⋯⋯715-02-14呼叫拥塞··············，，··············⋯⋯715-02-19等效随机电路群··········，·，······，⋯⋯715-06-06等效随机业务f强度·····，·······⋯⋯715-05-20第一次试呼···························⋯⋯715-03-04基本路由······························⋯⋯715-07-02地址··························，·········⋯⋯715-01-15交换····································⋯⋯715-01-08点到点业务f··············，，········⋯⋯715-05-14交换节点······························⋯⋯715-08-09电路交换····················，········⋯⋯715-09-01交换局·············，··················⋯⋯715-01-09电路交换单元··········，，，，，，，，·⋯715-09-04交换局呼叫建立时延·，，，，··⋯⋯715-04-04电路交换网················，，，·······⋯⋯715-09-02交换局类别······，，···，············⋯⋯715-09-11电路群·····················，·········⋯⋯715-09-06交换网···········，，··················。·⋯715-08-03电路子群······························⋯⋯715-09-07交换中心······························⋯⋯715-08-10[电信」电路··························⋯⋯715-01-03接入线·································⋯⋯715-08-12电信网························，·······⋯⋯715-01-05节点·················，··················⋯⋯715-08-06电信网体系结构··········，····，·····⋯⋯715-08-0114 GB/T2900.68-2005/IEC60050-715:1996首选电路群二715-06-01首选路由··⋯715-07-02可闻指示715-01-18双向「的](1)715-01-11空闲『的门715-02-06双向[的口(2)715-01一13双向电路·一715-09-14随机业务t二715-05-19连接···································⋯⋯715-01-07损失操作模式715-02-12连接线·······························⋯⋯715-08-12损失试呼··⋯715-03-09链······································⋯⋯715-07-04链流···································⋯⋯715-07-05链路····································⋯⋯715-01-04提供业务t······⋯⋯715-05-05路由(交换)··························⋯⋯715-07-01通道···········⋯⋯””715-08-08通信715-01-01M同步网715-08-05满供电路群····························，·⋯715-06-04W忙[的」·····························⋯⋯715-02-07忙时····································⋯⋯715-07-07外部闭塞·····························⋯⋯715-02-17目的地·····，·························⋯⋯715-05-13完成率·······························⋯⋯715-03-12完成试呼······························⋯⋯715-03-11网络簇·····························，·⋯⋯715-07-06内部闭塞··············⋯⋯715-02-16内部业务t··············一715-07-17线路群································，·⋯715-09-08线群大小·····························，⋯⋯715-09-09排队时间715-02-14消息交换·····························⋯⋯715-10-01平滑业务t···········⋯⋯‘””‘’‘”””’715-05-17消息交换网··························⋯⋯715-10-02平均忙时·················⋯⋯””’‘””’‘’715-07-10携载业务f··························⋯⋯715-05-03平均日忙时业务纽强度···········⋯⋯715-07-09携载业务f〔强度口·················⋯⋯715-05-04泊松业务t············⋯⋯715-05-19信令(电信)···················⋯⋯‘⋯⋯715-01-14信令网································⋯⋯715-08-04日忙时比715-07-11入局电路715-09-12延时操作模式·················，·····⋯⋯715-02-13入局响应时延715-04-03业务电路·····························⋯⋯715-09-05入局业务皿二715-07-18业务A(电信)·······················⋯⋯715-05-01业务量包·····························⋯⋯715-05-14业务t分布不平衡····················，一715-07-22时间一致性忙时·················⋯⋯715-07-10业务且负荷···········，············⋯⋯715-05-04时间拥塞····························，二715-02-18业务里负荷不平衡··················⋯⋯715-07-22始发地715-05-12业务里积···························⋯⋯715-05-11始发业务t715-07-15业务f矩阵···························，·⋯715-05-15释放715-02-09业务A强度··························⋯⋯715-05-02试呼715-03-01业务里选路···························⋯⋯715-09-10t5 GB/T2900.68-2005/IEC60050-715:1996业务，选路计划715-09-03占用请求·····························⋯⋯715-02-03溢出业务t··⋯715-05-07直通连接时延·······················⋯⋯715-04-05抑制业务t··⋯715-05-10终端····································⋯⋯715-01-06应答时延··⋯⋯715-04-07终端点·································⋯⋯715-08-02应答占用比··⋯715-02-20中继群·································⋯⋯715-09-06应答占用请求比715-02-21终接业务1a··，·······················⋯⋯715-07-16拥塞⋯⋯““‘’“715-02-15终选电路群···························⋯⋯715-06-05用户⋯⋯’二‘””715-02-02专用电信网··························⋯⋯715-01-17用户环路··⋯⋯715-08-12转接交换局··························⋯⋯715-08-14用户线·····⋯⋯715-08-12转接业务f···························⋯⋯715-07-20有效业务t··⋯715-07-12转接中心······························⋯⋯715-08-14迂回路由··⋯⋯715-07-03资源································⋯⋯715-02-01自由[的〕....................................715-02-05最终电路群···························⋯⋯715-06-03占用715-02-04 GB/T2900.68-2005/IEC60050-715:1996英文索引abandonedcallattempt715-03-07abandonedtraffic715-05-09ABR(abbreviation)···。·······。····················································。·····················⋯⋯715-02-21accessline715-08-12address·················。..⋯。·.········································...........········⋯⋯715-01-15alternativeroute······，··⋯。。....·······································.·.·........····⋯⋯715-07-03answerbidratio·································································。··。。·················⋯⋯715-02-21answerseizureratio715-02-20answeringdelay715-04-07architectureofatelecommunicationnetwork715-08-01ASR(abbreviation)·············································································。·········⋯⋯715-02-20abandonedcallattempt715-03-07audibleindications·······························································。·。·。。················⋯⋯715-01一18auxiliaryswitchingunit·····································································⋯⋯“‘’·‘’·’·‘715-08-13averagedailypeakhourtrafficintensity····························································⋯⋯715-07-09bid..................······················································。··········。·。。············⋯⋯715-02-03bidirectional··。···················································。···。。·。。····························⋯⋯715-01-11blocked··················。······。···········································，··········。。。·············⋯⋯715-02-08blockedcallattempt····················································································⋯⋯715-03-08blockedtraffic·········································。·。·。·······。································。。。·⋯⋯715-05-08blocking·································································································⋯⋯715-02-15both-way······························································································⋯⋯715-01-13both-waycircuit························································································⋯⋯715-09-14bouncingbusyhour···················································································⋯⋯715-07-08branch······························································。············。··。。·················⋯⋯715-08-07busiedout···························································。·。·。··。·····························⋯⋯715-02-08busy·······································································································⋯⋯715-02-07busyhour·····················..................................................................................715-07-07call·································································。··。····。··。·········。··············⋯⋯715-03-02callattempt·····························································································⋯⋯715-03-01callcongestion·························································································⋯⋯715-02-19callintensity··························································································⋯⋯715-03-13callintent····。·。····。························································。··········。···。···········⋯⋯715-03-03callstring································································································⋯⋯715-03-0617 GB/T2900.68-2005/IEC60050-715:1996chain······································。··。··························································⋯⋯715-07-04chainflow··········。·。·················································································，二715-07-05circuit···································································································⋯⋯715-01-03circuitgroup··························································································⋯⋯715-09-06circuitsubgroup··························································，······························⋯⋯715-09-07circuitswitching·········································，···，·······································⋯⋯715-09-01circuitswitchingnetwork······················，···················································⋯⋯715-09-02circuitswitchingunit····························，·····················································⋯⋯715-09-04classofanexchange·····························································，················⋯⋯715-09-11communication。············。·······································································⋯⋯715-0卜01completedcallattempt··············································································⋯⋯715-03-11completionratio································，·····················································⋯⋯715-03-12congestion·····························································································⋯⋯715-02-15connection·················。··········································································⋯⋯715-01-07connectionline···············································。··································，········。二715-08-12daytobusyhourratio715-07-11delaymodeofoperation·⋯⋯715-02-13destination(ofacallattempt)715-05-13dialingtime⋯⋯””””‘”’‘”715-04-02dial-tonedelay715-04-01effectivecallattempt··········⋯⋯715-03-11effectivetraffic715-07-12efficiency·······················..⋯⋯715-03-12equivalentrandomtrafficintensity715-05-20equivalentrandomcircuitgroup715-06-06erlang715-05-06exchange······················⋯⋯715-01-09exchangecal!set-updelay······一715-04-04externalblocking715-02-17finalcircuitgroup715-06-03firstcallattempt715-03-04firstchoicecircuitgroup715-06-01firstchoiceroute·····························································，····················⋯⋯715-07-02介ee715-02-05fullyprovidedcircuitgroup715-06-04fully-routedcallattempt715-03-1018 GB/T2900.68-2005/IEC60050-715:1996gradeofservice715-07-13片ruupsize715-09-09highusagecircuitgroup715-06-02holdingtime715-02-10idle······。······。。····。·。·。·································································。···········。··⋯⋯715-02-06incomingcircuit··························································································⋯⋯715-09-12incomingresponsedelay················································································⋯⋯715-04-03incomingtraffic··························································································⋯⋯715-07-18internalblocking·····················，····································································⋯⋯715-02-16internaltraffic·········································································。······。。··········。一715-07-17lastchoicecircuitgroup·················································································⋯⋯715-06-05linegroup································································································⋯⋯715-09-08link·····。。····。·。···。···。····。。。······················································。。。······。·。·········。·。·。二715-01-04localswitchingexchange··············································································⋯⋯715-08-11localtraffic·······················································································。。·······⋯⋯715-07-21lossmodeofoperation···············，································································⋯⋯715-02-12lostcallattempt··························································································⋯⋯715-03-09Mmeanbusyhour715-07-10messageswitching715-10-01messageswitchingnetwork715-10-02networkcluster715-07-06node······⋯⋯715-08-06Oone-way715-01一12origin(ofacallattempt)715-05-12originatingtraffic715-07-15outgoingcircuit715-09-13outgoingtraffic715-07-19overflowtraffic715-05-0719 GB/T2900.68-2005/IEC60050-715:1996packetswitching···········································，，···················⋯⋯‘·，········⋯⋯“”’‘’“715-11-01packetswitchingnetwork715-11-02path·······················‘···，···，，···························，···············‘·............................715-08-08peakbusyhour715-07-08peakedtraffic·············································，·················⋯⋯““·····⋯⋯“‘’“““‘””715-05-18peakednessfactor715-05-16point-to-pointtraffic········，····························，······⋯⋯“‘·“”’‘’“‘·”“‘’‘””‘”’‘”‘.““715-05-14Poissontraffic·································。。···‘······，，·····。·················，········，，，···。·····⋯⋯715-05-19postselectedbusyhour715-07-08post-diallingdelay715-04-06primaryroute················，，··········································································⋯⋯715-07-02privatetelecommunicationnetwork715-01-17publictelecommunicationnetwork715-01一16Qqualityofservice715-07-14queuingtime715-02-14randomtraffic715-05-19reattempt715-03-05release715-02-09repeatedcallattempt715-03-05resource715-02-01route715-07-01seizure··，·························，···············。。··。·······，，，···。·。························，··········⋯⋯715-02-04servicetime，，·。‘。。·。··，。。········，··11··。··。。。‘-，···，，···，··“。‘。。。·····，····，，，，··⋯715-02-1，servingconnectionexchange··························，，，，··························，··············⋯⋯715-08-11signalling·····················，························································，·，···············⋯⋯715-0卜14signallingnetwork····················································································⋯⋯715-08-04smoothtraffic······。。····················。················。·。························，··················⋯⋯715-05-17storeandforwardswitchednetwork····································。·········，····················。一715-10-02subscriber"sline·。···。····。··，···，，····。·························，，······················，，················一715-08-12subscriber"sloop·······，，···，······4‘·。。··，，····················‘··，····，，，，·，·····_.....715-08-12successfulcallattempt·····，，························，，····························，···，············⋯⋯715-03-10suppressedtraffic·········，····························，··············································⋯⋯715-05-10switchednetwork··········。······································。·················，·····················。二715-08-03switching·················.··············································································⋯⋯715-0卜08switchingcentre··············，·，··························，·····························，，，···········⋯⋯715-08-10switchingentity············································，·····················，，，，，··············⋯⋯715-0卜0920 GB/T2900.68-2005/IEC60050-715;1996switchingnode715-08-09switchingoffice·······························⋯⋯，···················································⋯⋯715-01-09switchingunit···········································································⋯⋯‘·”””‘”·‘·⋯’715-01-09synchronizationnetwork715-08-05T(telecommunication)circuit715-01-03telecommunicationnetwork715-01-05teletraffic715-01-19terminal715-01-06terminalpoint················································································⋯⋯‘·⋯‘·⋯⋯715-08-02terminatingtraffic715-07-16through-connectiondelay715-04-05timecongestion715-02-18timeconsistentbusyhour715-07-10traffic715-05-01trafficcarried·················。。······。·。····。。。····················。·········。···。·······。···············⋯⋯715-05-03trafficcarried(intensity)715-05-04trafficcircuit715-09-05trafficdistributionimb-I...715-07-22trafficintensity715-05-02trafficload715-05-04trafficloadimb-1A-ce715-07-22trafficmatrix715-05-15trafficoffered···········。···。····。·。········。····················。······。·。·。。····························⋯⋯715-05-05trafficparcel715-05-14trafficrouting·····························································································⋯⋯715-09-10trafficroutingplan715-09-03trafficvolume715-05-11transitcentre............................................................................................:......715-08-14transitexchange715-08-14transittraffic715-07-20transmissionchannel715-01-02trunkgroup···············································································⋯⋯““·······⋯⋯715-09-06two-way715-01一13two-waycircuit·················，········································································⋯⋯715-09-14Iiunidirectional715-01-10user715-02-02Wwaitingtime715-02-14'