标准摘要
[中文适用范围]: 本部分 IEC 60728 规定了混合光纤同轴(HFC)外部设备(OSP)物理(PHY)层规范的要求,是由 SCTE 下属的混合管理子层(HMS)分委员会开发的一系列规范的一部分。HMS 规范的目的是支持设计和实现可互操作的管理系统,以用于不断发展的 HFC 有线网络。HMS 物理(PHY)层规范描述了用于通信的协议栈的物理层部分,该通信发生在符合 HMS 规范的转发器与管理外部设备网络元素(NE)和集中式前端元素(HE)之间。 本标准描述了必须在 HFC 设备上实现的所有符合类型 2 和类型 3 的 OSP HMS 转发器以及前端控制设备中实现的 PHY 层要求。任何对本标准合规性的例外情况将在必要时特别注明。有关类型分类的完整定义,请参阅表 1。电磁兼容性(EMC)在本标准中未作规定,由供应商确保符合当地的 EMC 法规要求。除工作温度外,物理参数如冲击、振动、湿度等也未作规定,由供应商自行决定。 [外文原描述]: IEC 60728-7-1:2003+A1:2015 specifies requirements for The Hybrid Fibre Coax (HFC) Outside Plant (OSP) Physical (PHY) Layer Specification and is part of the series of specifications developed by the Hybrid Management Sub-Layer (HMS) subcommittee under the SCTE. It describes the PHY layer requirements that must be implemented by all Type 2 and Type 3 compliant OSP HMS transponders on the HFC plant and the controlling equipment in the head-end. Any exceptions to compliance with this standard will be specifically noted herein as necessary. Refer to Table 1 for a full definition of the type classifications. This consolidated version consists of the first edition (2003) and its amendment 1 (2015). Therefore, no need to order amendment in addition to this publication.
英文名称Cable networks for television signals, sound signals and interactiveservices - Part 7-1: Hybrid Fibre Coax Outside Plant status monitoring - Physical (PHY) layer specification