M17 传输系统组群、频谱安排 标准查询与下载

ITU-R QUESTION 208/1-1995 国家频谱管理的替代方法

The ITU Radiocommunication Assembly considering a)that Study Group 1, in accordance with the conclusions of the Second National Frequency Management Meeting should take note of the special requirements of national spectrum management organizations from developing countries and devote particular attention to these matters during the regular meetings of the Study Group and its Working Parties;b)that spectrum management is becoming increasingly complex;c)that recurring spectrum management issues are becoming increasingly difficult to resolve.

Alternative methods of national spectrum management

ITU-T X.217-1995 信息技术—开放系统互连—联系控制业务元素的业务定义

Information Technology - Open Systems Interconnection - Service Definition for the Association Control Service Element - Data Networks and Open System Communications Open Systems Interconnection - Service Definitions 28 pp

Information Technology - Open Systems Interconnection - Service Definition for the Association Control Service Element - Data Networks and Open System Communications Open Systems Interconnection - Service Definitions 28 pp

ITU-T X.216 ADD 1-1995 开放系统互连—表示层效率提升的业务定义

The ITU-T (Telecommunication Standardization Sector) is a permanent organ of the International Telecommunication Union (ITU). The ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view t

Open Systems Interconnection - Service Definition for Presentation Layer Efficiency Enhancements - Data Networks and Open System Communications Open Systems Interconnection - Service Definitions (Study Group 7) 9 pp

ITU-T X.215-1995 信息技术-开放网络连接-部分服务定义-数据网络和开放系统通信和连接-服务定义

This Recommendation i International Standard defines in an abstract way the externally visible service provided by the OS1 Session Layer in terms of the primitive actions and events of the service

Information Technology - Open Systems Interconnection - Session Service Definition - Data Networks and Open System Communications Open Systems Interconnection - Service Definitions

ITU-T X.224-1995 信息技术—开放系统互连—提供连接模式传输业务协议 系列X

ITü (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications.

Information Technology - Open Systems Interconnection - Protocol for Providing the Connection-Mode Transport Service - Series X: Data Networks and Open System Communication; Open Systems Interconnection - Connection-Mode Protocol Specifications

ITU-T X.225-1995 信息技术.开放系统互连.面向连接的会话协议:协议规范

ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications.

Information Technology - Open Systems Interconnection - Connection-Oriented Session Protocol: Protocol Specification - Data Networks and Open System Communications Open Systems Interconnection - Connection-Mode Protocol Specifications 182 pp

ITU-T X.226 ADD 1-1995 (撤回)开放系统互连—会话层功效增强协议规范

This ITU-T Addendum is one of a set of Addenda produced to facilitate the interconnection of information processing systems in an open environment where efficiency of communications is paramount. Such efficiencies include

Open Systems Interconnection - Protocol for Presentation Layer Efficiency Enhancements - Data Networks and Open System Communications - Open Systems Interconnection - Connection-Mode Protocol Specifications (Study Group 7) 18 pp

ITU-T X.225 ADD 1-1995 开放系统互连 - 会话层功效增强协议规范

The ITU-T (Telecommunication Standardization Sector) is a permanent organ of the International Telecommunication Union (ITU). The ??ü-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view t

OPEN SYSTEMS INTERCONNECTION - PROTOCOL SPECIFICATION FOR SESSION LAYER EFFICIENCY ENHANCEMENTS

ITU-T X.226-1994 信息技术—开放系统互连—面向连接的表示协议:协议规范

This ITU-T Recommendation I International Standard specifies a protocol which is used to provide the codnection-mode presentation service (see Recommendation X. 21 6)

Information Technology - Open Systems Interconnection - Connection-Oriented Presentation Protocol: Protocol Specification - Data Networks and Open System Communications Open Systems Interconnection - Connection-Mode Protocol Specifications 68 pp

ITU-R SM.669-1-1994 频谱共享研究的保护比

that frequency sharing is an important aspect of efficient spectrum utilization;

Protection Ratios for Spectrum Sharing Investigations

ITU-R M.1038 SPANISH-1994 移动卫星系统在1-3 GHz频段内的频谱和同步卫星轨道的有效利用

The ITU Radiocommunication Assembly, considering Resolution No.208 (Mob-87) of the World Administrative Radio Conference for the Mobile Services (Geneva, 1987) (CAMR MOB-87); that the frequency spectrum allocated to the mobile-satellite services (MSS) in the 1-3 GHz range should be used efficiently.

EFFICIENT USE OF THE GEOSTATIONARY-SATELLITE ORBIT AND SPECTRUM IN THE 1-3 GHz FREQUENCY RANGE BY MOBILE-SATELLITE SYSTEMS

ITU-R M.1038 FRENCH-1994 移动卫星系统在1-3 GHz频段内的频谱和同步卫星轨道的有效利用

The ITU Radiocommunication Assembly, considering Resolution No.208 (Mob-87) of the World Administrative Radio Conference for the Mobile Services (Geneva, 1987) (CAMR MOB-87); that the frequency spectrum allocated to the mobile-satellite services (MSS) in the 1-3 GHz range should be used efficiently.

EFFICIENT USE OF THE GEOSTATIONARY-SATELLITE ORBIT AND SPECTRUM IN THE 1-3 GHz FREQUENCY RANGE BY MOBILE-SATELLITE SYSTEMS

ITU-T X.216-1994 信息技信息技术—开放系统互连—表示业务定义

This ITü-T Recommendation I International Standard specifies the services which are provided by the presentation layer to the application layer at the boundary between the application layer and the presentation layer of the OS1 reference model. This inclu

Information Technology - Open Systems Interconnection - Presentation Service Definition - Data Networks and Open System Communications Open Systems Interconnection Service Definition 49 pp

ITU-R QUESTION 211/7-1993 太空研究业务与37-38 GHz和40-40.5 GHz频段内的其他业务之间的频率共享

The ITU Radiocommunication Assembly considering a) that new allocations were made on a primary basis to the space research service at the World Administrative Radio Conference for Dealing with Frequency Allocations in Certain Parts of the Spectrum (Málaga-Torremolinos, 1992) (WARC-92) in the 37-38 and 40-40.5 GHz bands; b) that the bands, or portions thereof, are also allocated to the fixed, mobile, Earth-exploration satellite, fixed-satellite and mobile-satellite services

Frequency sharing between the space research service and other services in the 37-38 GHz and 40-40.5 GHz bands

ITU-T G.744 SPANISH-1993 以8448 kbit/s速率运行的二级脉冲编码调制多路复用设备

The Recommendation describes that the encoding law used is the A-law as specified in Recommendation G.711. The sampling rate, load capacity and the code are also specified in that Recommendation.

SECOND ORDER PCM MULTIPLEX EQUIPMENT OPERATING AT 8448 kbit/s

ITU-T G.743 SPANISH-1993 以6312 kbit/s速率运行且使用正码速调整的二级数字多路复用设备

The Recommendation describes that the second order digital multiplex equipment using positive justification described below, is intended for use on digital paths between countries using 1544 kbit/s primary multiplex equipments.

SECOND ORDER DIGITAL MULTIPLEX EQUIPMENT OPERATING AT 6312 kbit/s AND USING POSITIVE JUSTIFICATION

ITU-T G.742 SPANISH-1993 以8448 kbit/s速率运行的二级数字多路复用设备

The Recommendation describes that the second order digital multiplex equipment using positive justification, described below, is intended for use on digital paths between countries using 2048 kbit/s primary multiplex equipments.

SECOND ORDER DIGITAL MULTIPLEX EQUIPMENT OPERATING AT 8448 kbit/s AND USING POSITIVE JUSTIFICATION

ITU-T G.741 SPANISH-1993 二级多路复用设备的一般考虑

The CCITT,considering (a) that different primary and second order multiplex equipments exist, depending upon the characteristics of different networks and the various types of signals to be transmitted in those networks;(b) that, although studies will continue with the aim of reducing the differences between various systems, the existing situation cannot be changed in the near future.

GENERAL CONSIDERATIONS ON SECOND ORDER MULTIPLEX EQUIPMENTS

ITU-T G.739 SPANISH-1993 以2048 kbit/s速率运行和以320 kbit/s及/或64 kbit/s速率提供同步数字访问的外部访问设备特性

This Recommendation gives the characteristics of equipment (external to PCM muldexes) operating at 2048 kbit/s and providing one or several of the following tributaries into/from channel time slots of a 2048 kbit/s composite signal

CHARACTERISTICS OF AN EXTERNAL ACCESS EQUIPMENT OPERATING AT 2048 kbit/s OFFERING SYNCHRONOUS DIGITAL ACCESS AT 320 kbit/s AND/OR 64 kbit/s

ITU-T G.738 SPANISH-1993 以2048 kbit/s速率运行和以320 kbit/s及/或64 kbit/s速率提供同步数字访问的首要脉码调制多路复用设备特性

This Recommendation gives the characteristics of a PCM multiplex equipment operating at 2048 kbit/s and providing one or several of the following internal digital access options.

CHARACTERISTICS OF PRIMARY PCM MULTIPLEX EQUIPMENT OPERATING AT 2048 kbit/s AND OFFERING SYNCHRONOUS DIGITAL ACCESS AT 320 kbit/s AND/OR 64 kbit/s