M38 数字通信设备 标准查询与下载

ITU-R SA.1414-1999 数据中继卫星系统特性

This Recommendation specifies technical parameters (frequencies, link, signal and data characteristics, antenna parameters, etc.) and operational characteristics of interplanetary and deep-space systems operating in the space-to-Earth direction around 283

Characteristics of Data Relay Satellite Systems

YD/T 989-1998 灵活复用设备技术要求

本标准规定了用于接人网的灵活复用设备的特性，该设备能为业务提供者提供透明传送和处理各种业务的能力，提供增强的系统管理能力，还可以具有集中功能。这种复用设备的分支接口采用与业务相关的通用接口。内部映射功能以建议G.704的n×64kbit/s信号为基础。也可以处理子64kbit/s信号。本设备可以分为基于PDH环境下的灵活复用设备，以及基于SDH环境下的灵活复用设备。设备的管理和TMN的一般原则一致。 本标准规范了PDH灵活复用设备以及SDH灵活复用设备的功能特性、网络配置、接口要求、缺陷和失效状态的检测及相应措施，以及设备性能等内容。 本标准适用于对灵活复用声备的研制和开发;适于在接人网中使用，以便将多种业务灵活地接人到相应的业务节点上。

The Technical Requirement of Flexible Multiplexer

YDN 105-1998 同步数字体系(SDH) 复用终端设备测试方法(内部标准)

Synchronous digital hierarchy (SDH) - Test method of multiplexing terminal equipment (internal standard)

YD/T 974-1998 SDH数字交叉连接设备(SDXC)技术要求和测试方法

本标准规定了SDH数字交叉连接设备的类型、功能要求、性能要求、接口要求、工作环境要求以及运管理和维护要求，并不限定设备的具体实现方法，也不涉及设备的具体技术细节规范。 本标准规定了SDH数字交叉连接设备的基本测试方法。 本标准不规定DXCI/0类型设备的技术要求和测试方法。 本标准是进行SDH数字交叉连接设备研制开发、例行测试、出厂验收、引进和维护运行的基本技术依据。 本标准适用于在公用网上的SDH数字交叉连接设备，也适用于专用电信网中类似设备。 本标准的测试方法可供实际工程测试参考。

Specifications and Measurement Methods for SDH Digital Cross Connect Equipment (SDXC)

SJ 20686-1998 中继信令处理模块通用规范

General specification for trunk signalling processing modules

ITU-T Q.953.3-1997 使用DSS 1数字标识补充业务的第3阶段描述:对忙线用户呼叫的完成(CCBS)-系列Q:NO.1数字用户信令系统

This Recommendation specifies the stage three of the Completion of Calls to Busy Subscribers (CCBS) supplementary service for the Integrated Services Digital Network (ISDN) at the T reference point or coincident S and T reference point (as defined in Reco

Stage 3 Description for Call Completion Supplementary Services Using DSS 1: Completion of Calls to Busy Subscribers (CCBS) - Series Q: Switching and Signalling Digital Subscriber Signalling System No. 1 - Stage 3 Description for Supplementary Services Usi

ITU-T Q.952.7-1997 使用DSS 1数字标识补充业务的第3阶段描述:明确的呼叫转移--系列Q:交换和信令-NO.1数字用户信令系统

This Recommendation specifies the stage 3 of the Explicit Call Transfer (ECT) supplementary service for the Integrated Services Digital Network (ISDN) at the T reference point or coincident S and T reference point (as defined in Recommendation 1.41 1 [3])

Stage 3 Description for Call Offering Supplementary Services Using DSS 1: Explicit Call Transfer (ECT) - Series Q: Switching and Signalling Digital Subscriber Signalling System No.1 - Stage 3 Description for Supplementary Services Using DSS 1 Study Group

ITU-T Q.951.7-1997 使用DSS 1数字标识补充业务的第3阶段描述:多用户号码-系列Q:交换和信令-NO.1数字用户信令系统

This Recommendation specifies the stage 3 of the Malicious Call Identification (MCID) supplementary service for the Integrated Services Digital Network (ISDN) at the T reference point or coincident S and T reference point (as defined in Recommendation 1.4

Stage 3 Description for Number Identification Supplementary Services Using DSS 1: Malicious Call Identification (MCID) - Sereis Q: Switching and Signalling Digital Subscriber Signalling System No.1 - Stage 3 Description for Supplementary Services Using DS

YD/T 902-1997 STM-1,STM-4,STM-16再生中继设备测试方法

本标准规范了在我国公用电信网中使用的STM-N(N=1,4,16)单个再生中继设备的基本测试方法。用于再生中继设备的研制、生产、例行试验和出厂验收。实际工程、系统的测试不属于本标准的范围。 部分测试方法也可供实际系统工程参考。 专用电信网中的类似设备亦可参照本标准。

Test method of STM-1, STM-4, STM-16 regenerative trunk equipments

ITU-T G.766-1997 数字电路倍增设备(DCME)的传真解调/再调制

This Recommendation for a Digital Circuit Multiplication Equipment (DCME) facsimile module is intended to be as flexible as possible in an open-network environment, while providing manufacturers of equipment the license to invent, whilst maintaining equipment interoperability.

Facsimile Demodulation/Remodulation for Digital Circuit Multiplication Equipment - Series G: Transmission Systems and Media Digital Transmission Systems - Terminal Equipments - Principle Characteristics of Transcoder and Digital Multiplication Equipment (

ITU-R SF.1320-1997 用于移动卫星业务馈线链路并与无线电中继系统使用相同频段的固定卫星业务中非静止卫星产生的地球表面功率通量密度的最大允许值

The highest level of interference occurs when a non-GSO MSS feeder link satellite is within the main beam of a terres?rial system antenna. If the non-GSO satellite antenna is considered having a symmetrical gain pattern along the satellite nadir axis, the

Maximum Allowable Values of Power Flux-Density at the Surface of the Earth Produced by Non-Geostationary Satellites in the Fixed-Satellite Service Used in Feeder Links for the Mobile-Satellite Service and Sharing the Same Frequency Bands with Radio-Relay

ITU-R SA.1274-1997 便于与2025-2110MHz和2200-2290MHz频段固定业务系统共享的数据中继卫星网络的标准

that active spaceborne sensors operate in the 1 215 to 1 300 MHz radiolocation band under the provision of No. S5.333 of the Radio Regulations

Criteria for Data Relay Satellite Networks to Facilitate Sharing with Systems in the Fixed Service in the Bands 2 025-2 110 MHz and 2 200-2 290 MHz

YD/T 882-1996 STM-1,STM-4,STM-16再生中继设备主要技术要求

本标准规定了在我国公用电信网中使用STM-N(N＝l、4、16)再生中继设备的主要技术要求。 本标准适用于在光缆上传输SDH数字信号的线路传输系统中的再生中继设备。它是设计这类系统中再生中继设备的技术规范。专用电信网中的类似设备亦可参照本标准。

Main technical requirement for STM-1, STM-4, STM-16 regenerative trunk equipments

NF Z66-804-5:1996 信息技术.国际界面标准RA.无连接中继服务用继电器.第5部分:RA51.51界面的定义.CSMA/CD型局域部分网之间无连接中继服务用继电器

Information technology. International standardized profile RA. Relaying the connectionless-mode network service. Part 5 : definition of profile RA51.51, relaying the connectionless-mode network service between CSMA/CD LAN subnetwork.

DIN ETS 300598:1996 欧洲数字移动电话远程通信系统(阶段2).半价通道用遥控变码器和速率适配器的频带内控制; 英文版本 ETS 300598:1995

This document describes the protocol between the BTS and the remote Transcoder/Rate Adaption Unit (TRAU) for speech and data on half rate traffic channel (TCH/H).

European digital cellular telecommunications system (Phase 2) - In-band control of remote transcoders and rate adaptors for half rate traffic channels; English version ETS 300598:1995

ITU-T Q.957.1-1996 附加信息传递补充业务第3阶段描述:用户到用户信令(UUS)-系列Q:NO.1数字用户信令系统

The UüS supplementary services provide a means of communication between two users by using as a basis the layer 3 protocol defined in clause 514.93 1 [ 11. User-to-user signalling is used to exchange information between two users to provide the services d

Stage 3 Description for Additional Information Transfer Supplementary Services Using DSS 1: User-to-User Signalling (UUS) Study Group 11; 36 pp

ITU-T O.150 FRENCH-1996 数字传输设备性能测量仪器的一般要求.4号研究组.24pp

This Recommendation contains general requirements applicable to the O-Series Recommendations for instrumentation for performance measurements on digital transmission equipment.

General Requirements for Instrumentation for Performance Measurements on Digital Transmission Equipment

ITU-T O.150 SPANISH-1996 数字传输设备性能测量仪器的一般要求.4号研究组.24pp

This Recommendation contains general requirements applicable to the O-Series Recommendations for instrumentation for performance measurements on digital transmission equipment.

General Requirements for Instrumentation for Performance Measurements on Digital Transmission Equipment

YD/T 822-1996 p×64kbit/s 会议电视编码方式

本标准规定了64kbit/s～19 20kbit/s会议电视的一种视频编解码方式。 本标准适用于速率为pX64kbit/s(p=1～30)的国际国内会议电视等声象业务，也叮通过2G48kbit/s系列数字电路开放会议电视业务。

p×64kbit/s conference TV encoded mode

YD/T 821-1996 数字传输性能测量的数字图形

本标准规定了标准的和成帧的测试序列，以及在PDH和SDH系统上，差错性能测量的块长。 本标准是工作在各类比特率的数字传输系统，及其复用/分用器以及开业务监测的差错性能测量及测量设备的技术设计和制造的依据。

Numerical graphics of measured digital transmission performances