G.709中文翻译学习.docx

1 ScopeThe optical transport hierarchy (OTH) supports the operation and management aspects of optical networks of various architectures, e.g., point-to-point, ring and mesh architectures.This Recommendation defines the interfaces of the optical transport network to be used within and between subnetworks of the optical network, in terms of: optical transport hierarchy (OTH) functionality of the overhead in support of multi-wavelength optical networks frame structures bit rates formats for mapping client signals.光传送体系（OTH）支持不同架构的光网络的运营和管理，例如，点对点，环形和网状架构。该协议依据如下维度定义了光网络的接口的标准，该接口用于光网络子网内部及子网之间的通信。- 光传送体系（OTH）- 支持多波光网络的开销的功能- 帧结构- Bit率- 客户信号 映射格式The interfaces defined in this Recommendation can be applied at user-to-network interfaces (UNI) and network node interfaces (NNI) of the optical transport network. It is recognized, for interfaces used within optical subnetworks, that aspects of the interface are optical technology dependent and subject to change as technology progresses. Therefore, optical technology dependent aspects (for transverse compatibility) are not defined for these interfaces to allow for technology changes. The overhead functionality necessary for operations and management of optical subnetworks is defined.协议定义的接口，可以应用于光传送网络的用户网络接口（UNI）和网络节点接口（NNI）。对于光网络的子网的接口应用，某些方面是受限于科技进步的。所以，依赖于光科技的方面（横向兼容方面）是没有被定义的，从而允许随着科技进步进行改变。光网络子网操作及管理需要的开销功能同样被定义。The second revision of this Recommendation introduced: support for an extended (unlimited) set of constant bit rate client signals; a flexible ODUk, which can have any bit rate and a bit-rate tolerance up to 100 ppm; a client/server independent generic mapping procedure to map a client signal into the payload of an OPUk, or to map an ODUj signal into the payload of one or more tributary slots in an OPUk; ODUk delay measurement capability.第二次修订的协议介绍了：- 支持一种扩展的CBR客户信号；- ODUk flex，可以是任意bit率，bit率最大容忍100 ppm；- 一种客户层与服务层独立的通用映射（GMP）步骤，将客户信号映射到OPUk的净和区，或者将一个ODUj信号映射到一个OPUk的一个或多个时隙的净和区；- ODUk的延迟测量能力。The third revision of this Recommendation introduces the text of Amendments 1 and 2,Corrigendum 1 and Erratum 1 to Recommendation ITU-T G.709/Y.1331 (2009) and support for more client signals.第三次修订的协议将修订1和2的文本，勘误表1和勘误1合入协议ITU-T G.709/Y.1331 (2009)，并支持更多的客户侧信号。2 ReferencesThe following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision; users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation.本协议有以下ITU-T协议以及其他参考包含的条款构成。在出版时，所示版本声明已经有效。所有协议集其他参考条款都以此版本为准；鼓励这个协议的用户，访问以下协议及参考的最新版本。协议清单会规律地发布。本协议引用的参考文献还还没有给出，作为一个独立重要的文件。ITU-T G.652 Recommendation ITU-T G.652 (2009), Characteristics of a single-mode optical fibre and cable.单模光纤和光缆的特性ITU-T G.653 Recommendation ITU-T G.653 (2006), Characteristics of a dispersion-shifted single-mode optical fibre and cable.色散位移单模光纤和光缆的特性。ITU-T G.655 Recommendation ITU-T G.655 (2009), Characteristics of a non-zerodispersion-shifted single-mode optical fibre and cable.ITU-T G.693 Recommendation ITU-T G.693 (2009), Optical interfaces for intra-officesystems.ITU-T G.695 Recommendation ITU-T G.695 (2009), Optical interfaces for coarsewavelength division multiplexing applications.ITU-T G.707 Recommendation ITU-T G.707/Y.1322 (2003), Network node interfacefor the synchronous digital hierarchy (SDH).ITU-T G.780 Recommendation ITU-T G.780/Y.1351 (2008), Terms and definitions forsynchronous digital hierarchy (SDH) networks.ITU-T G.798 Recommendation ITU-T G.798 (2006), Characteristics of opticaltransport network hierarchy equipment functional blocks.ITU-T G.805 Recommendation ITU-T G.805 (2000), Generic functional architectureof transport networks.ITU-T G.806 Recommendation ITU-T G.806 (2009), Characteristics of transportequipment Description methodology and generic functionality.ITU-T G.870 Recommendation ITU-T G.870/Y.1352 (2004), Terms and definitions foroptical transport networks (OTN).ITU-T G.872 Recommendation ITU-T G.872 (2001), Architecture of optical transportnetworks.ITU-T G.873.1 Recommendation ITU-T G.873.1 (2006), Optical Transport Network(OTN): Linear protection.ITU-T G.873.2 Recommendation ITU-T G.873.2 (2012), ODUk shared ring protection(SRP).ITU-T G.959.1 Recommendation ITU-T G.959.1 (2009), Optical transport networkphysical layer interfaces.ITU-T G.984.6 Recommendation ITU-T G.984.6 (2008), Gigabit-capable passiveoptical networks (GPON): Reach extension.ITU-T G.987.4 Recommendation ITU-T G.987.4 (2012), 10 Gigabit-capable passiveoptical networks (XG-PON): Reach extension.ITU-T G.7041 Recommendation ITU-T G.7041/Y.1303 (2003), Generic framingprocedure (GFP).ITU-T G.7042 Recommendation ITU-T G.7042/Y.1305 (2001), Link capacityadjustment scheme (LCAS) for virtual concatenated signals.ITU-T G.7044 Recommendation ITU-T G.7044/Y.1347 (2011), Hitless Adjustment ofODUflex(GFP).ITU-T G.7714.1 Recommendation ITU-T G.7714.1/Y.1705.1 (2010), Protocol forautomatic discovery in SDH and OTN networks.ITU-T G.8011.1 Recommendation ITU-T G.8011.1/Y.1307.1 (2009), Ethernet privateline service.ITU-T I.432.1 Recommendation ITU-T I.432.1 (1999), B-ISDN user-networkinterface Physical layer specification: General characteristics.ITU-T M.1400 Recommendation ITU-T M.1400 (2001), Designations forinterconnections among operators networks.ITU-T M.3100 Amd.3 Recommendation ITU-T M.3100 (1995) Amd.3 (2001), Generic networkinformation model Amendment 3: Definition of the managementinterface for a generic alarm reporting control (ARC) feature.ITU-T O.150 Recommendation ITU-T O.150 (1996), General requirements forinstrumentation for performance measurements on digital transmissionequipment.ITU-T T.50 Recommendation ITU-T T.50 (1992), International Reference Alphabet(IRA) (Formely International Alphabet No. 5 or IA5) Informationtechnology 7-bit coded character set for information interchange.IEEE 802.3 IEEE Std. 802.3:2008, IEEE Standa