欢迎来到麦多课文档分享! | 帮助中心 海量文档,免费浏览,给你所需,享你所想!
麦多课文档分享
全部分类
  • 标准规范>
  • 教学课件>
  • 考试资料>
  • 办公文档>
  • 学术论文>
  • 行业资料>
  • 易语言源码>
  • ImageVerifierCode 换一换
    首页 麦多课文档分享 > 资源分类 > PDF文档下载
    分享到微信 分享到微博 分享到QQ空间

    ITU-T Q 608-1988 MISCELLANEOUS INTERWORKING ASPECTS《各种互通方面》.pdf

    • 资源ID:801803       资源大小:53.74KB        全文页数:6页
    • 资源格式: PDF        下载积分:10000积分
    快捷下载 游客一键下载
    账号登录下载
    微信登录下载
    二维码
    微信扫一扫登录
    下载资源需要10000积分(如需开发票,请勿充值!)
    邮箱/手机:
    温馨提示:
    如需开发票,请勿充值!快捷下载时,用户名和密码都是您填写的邮箱或者手机号,方便查询和重复下载(系统自动生成)。
    如需开发票,请勿充值!如填写123,账号就是123,密码也是123。
    支付方式: 支付宝扫码支付    微信扫码支付   
    验证码:   换一换

    加入VIP,交流精品资源
     
    账号:
    密码:
    验证码:   换一换
      忘记密码?
        
    友情提示
    2、PDF文件下载后,可能会被浏览器默认打开,此种情况可以点击浏览器菜单,保存网页到桌面,就可以正常下载了。
    3、本站不支持迅雷下载,请使用电脑自带的IE浏览器,或者360浏览器、谷歌浏览器下载即可。
    4、本站资源下载后的文档和图纸-无水印,预览文档经过压缩,下载后原文更清晰。
    5、试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓。

    ITU-T Q 608-1988 MISCELLANEOUS INTERWORKING ASPECTS《各种互通方面》.pdf

    1、INTERNATIONAL TELECOMMUNICATION UNION)45G134 1 TELECOMMUNICATIONSTANDARDIZATION SECTOROF ITU).4%27/2+).G0G0/b) there is no necessity to modify existing equipment to provide charge/no charge information transfer capabilities.From a technical viewpoint, international no charge calls are possible witho

    2、ut restrictions only when the SignallingSystems No. 6, No. 7 (TUP) or R2 are used exclusively throughout the entire international network (assuming that no chargeinformation is received from the national network).In the case of interworking with systems not able to transfer the no charge information

    3、, a no charge call can atpresent only be provided by withholding the answer signal. Consequently the transfer of no charge information must not beperformed in these cases.In the case of Signalling System No. 6, the information no charge should be sent together with the address-complete,no charge. If

    4、 this information is contradicted by the subsequent answer, charge signal the call should nevertheless not becharged ( 4.1.9, Signalling System No. 6 specification).The transfer of no charge information is possible when interworking:from any of the Signalling Systems: No. 61), No. 7 (TUP)1)and R2 to

    5、 any of the Signalling Systems: No. 6, No. 7(TUP) and R2.1)When interworking from Signalling System No. 6 or No. 7 (TUP) to Signalling System R2 the comments of 8.1 have to be taken intoaccount.2 Fascicle VI.6 - Rec. Q.6088.2 Time-out guidelines8.2.1 Time-outs connected with subscribers behaviourThe

    6、 specified register time-out of 4 to 6 seconds (after each digit is received which is resorted to when addresscomplete cannot be identified in another way) has proved to give satisfactory technical functioning at least in those caseswhere the exception described in Recommendation Q.261, 4.1.5, e) do

    7、es not apply.Insufficient information is obtained to motivate a change at this stage of the duration of the 4 to 6 seconds time-outspecified in the outgoing register in cases where no address-complete indication is available.It is recommended that the 4 to 6 seconds interdigital time-out procedure s

    8、hould be used where needed only. It isfurthermore recommended that Administrations make their network numbering known to their respondents so that maximumuse of number length analysis can be made whenever address-complete information cannot be given.8.2.2 General time-out guidelines for new signalli

    9、ng systemsi) 20-30 seconds is considered to be the proper time-out interval for outgoing registers for non-receipt of addresssignals, or address complete.ii) When backward signals are provided, if the address-complete signal is not available before 15-20 seconds afterthe last received address signal

    10、 at the incoming register, then an address incomplete signal should be sent. If,however, it is known that the address is complete, then the time-out should be extended to 20-30 seconds.iii) If it is known that a positive (real) address-complete signal is available but will not be returned within the

    11、 lowerlimit of the 20-30 second time-out period of the outgoing register then an artificial address-complete signalshould be sent within 15-20 seconds. The indiscriminate use of such a signal should be avoided. A new “call-in-progress“ signal should not be used instead of the “artificial address-com

    12、plete“ signal.iv) When backward signals are not available and complete number length analysis in the outgoing register is notpractical, then the 4-6 seconds time-out is used to determine address complete instead of the 20-30 seconds time-out mentioned in point i). This time-out commences when the mi

    13、nimum number length has been reached. Thenumber length is determined when the time-out matures or if the known maximum number length is received.8.2.3 General time-out guidelines for existing signalling systemsThese guidelines are primarily intended for signalling on international calls where fully

    14、overlap digit sending canoccur. Other guidelines may be appropriate to some national applications.During call set up both incoming and outgoing registers are normally supervised by timers. The duration of the time-out interval is defined in the relevant Recommendations defining the signalling system

    15、s. These are summarised in the tablebelow. In the case of a multi-link connection with overlap signalling, the time between digit transmission or reception will besupervised at each exchange, and according to existing Recommendations, at both incoming and outgoing registers in eachexchange. It is co

    16、nsidered that this situation is unsuitable since the cleardown of a call where insufficient digits are dialled canlead to unpredictable results because of the possibility of timers expiring in a different order on subsequent call attempts. Insome cases this can lead to different tones being returned

    17、 to the calling subscriber on subsequent calls. Since the first to expireand therefore normally the controlling time-out will be the incoming register time-out of around 15-20 seconds, it isrecommended that this time-out should only be activated at a single point in the connection at any stage of ca

    18、ll set up. Themost suitable point is the incoming register at the exchange closest to the called subscriber at any point in the call set up. Toachieve this it is recommended that the incoming register time-out should be inhibited at each exchange once the outgoingcircuit has been seized. The longer

    19、time-out of around 20-30 seconds which will be active at outgoing registers, and in somecases incoming registers also, should not be inhibited.This feature need not be implemented at existing exchanges or for Signalling System No. 4 which has time-outs not inconformance with modern practice.Fascicle

    20、 VI.6 - Rec. Q.608 38.2.4 Summary of inter-digital time-outsType of time-outSignalling System4567R1R2Outgoing 15-30 sQ.127 4.4.1.2a.220-30 sQ.268 4.8.5.1 (a)20-30 sQ.724 6.4.1 24 sQ.476 5.5.1.2IncomingReceipt of digit30-60 sQ.127 4.4.3(2)a10-20 s(to KP signal)20-40 stypical (toST signal)Annex 2Table

    21、s 4 and 615-20 sQ.261 4.1.615-20 sQ.724 1.710-20 s(to ST signal)Q.325 3.6.2.28-24 s(15-24 s)(preferred)Q.476 5.5.2.1OutgoingDetermination ofST condition4-6 sQ.152 3.2.14-6 sQ.321 3.2.1b(ii)IncomingTime-out afterST received20-30 sQ.268 4.8.5.3 (a)20-30 sQ.724 6.4.3 (a)8.3 Reset procedures8.3.1 When t

    22、he reset signal is received on an incoming Signalling System No. 6 or 7 (TUP) circuit the succeeding circuit isreleased by the clear-forward procedure in all cases.8.3.2 When the reset signal is received on an outgoing Signalling System No. 6 or 7 (TUP) circuit the response is:i) to initiate the cle

    23、ar-forward sequence on the outgoing circuit;ii) to release exchange equipment as appropriate, i.e. SPITE 3 in the register phase and SPITE 5 in the speechphase;iii) to return an appropriate signal and/or tone on the incoming circuit as shown in the following table.4 Fascicle VI.6 - Rec. Q.608SignallingSystem No.Register phase Wait for answer Answered Clear-back4 Busy flash Busy flash5 Busy flash Busy flash6 CFL CFL Clear-back + Congestion tone7 (TUP) CFL CFLcongestiontone if possibleif possibleR1 Congestion tone Congestion toneR2 A4/B4 Congestion tone


    注意事项

    本文(ITU-T Q 608-1988 MISCELLANEOUS INTERWORKING ASPECTS《各种互通方面》.pdf)为本站会员(ideacase155)主动上传,麦多课文档分享仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知麦多课文档分享(点击联系客服),我们立即给予删除!




    关于我们 - 网站声明 - 网站地图 - 资源地图 - 友情链接 - 网站客服 - 联系我们

    copyright@ 2008-2019 麦多课文库(www.mydoc123.com)网站版权所有
    备案/许可证编号:苏ICP备17064731号-1 

    收起
    展开