《国内No.7信令方式技术规范——2Mbit／s高速信令链路》行业标准简介

《国内No.7信令方式技术规范——2Mbit／s高速信令链路》(在以下介绍的过程中简称2Mbit／s高速信令链路)行业标准,是于2001年5月信息产业部以YD／T1125-2001标准号名称颁布的。、No.7信令网为电倍网的重要支撑网之一,其可靠运行及运行效率直接影响到电信网的运行效率。为了使现有No.7信令网能够在不进行较大改动的前提下,充分利用现有的网络资源,提供更高的传送带斑,简化维护工作量,在No.7信令网中引入高速信令链路已经成为No.7信令网建设发展的必然趋势。     

No．7信令设备概述

No.7信令方式是ITU-T建议最适合于数字电信网中使用的公共信道信令。我国于20世纪80年代中期就开始在北京等,少数大城市本地电话网中使用。1990年邮电部颁布了《中国国内电话网No.7信令方式技术规范》以后,No.7信令逐步开始在田内电话网中推广使用。我国最早的No.7信令网主要是在全国范围内采用三级结构固定电话网的信令网。     

No.7信令产品概览

共路信令系统(CCS)是现代通信网络的基础,无论是在公众电话网络、综合业务数字网络、智能网络、还是移动通信网络中。由于各种网络中的业务、功能的复杂性和多样性,一个快速、可靠、有效的信令系统是首要的要求。爱立信将No.7号信令系统(CCS7)很好的综合进AXE交换系统中。     

宜春市No.7信令网负荷的优化和分析

1 宜春市No.7信令网现状 根据信令网的三层结构,在本地信令网络中一般设有一对LSTP(低级信令转接点)和多个SP(信令点),在省会级城市设有一对HSTP(高级信令转接点).宜春市No.7信令网主要由一对LSTP和一些SP组成,这一对LSTP主要负责传递本地网中SP之间的No.7信令,网络结构如图1所示.     

连云港No.7信令网组建和信令编码探讨

探讨了连云港局(C3)将来组建No.7信令网以及信号点分区、信令点编码等问题.     

野战网中继群信令与公用网No.7信令转换的研究

按照“中国国内电话网No.7信号方式技术规范”和野战网中继群信令标准,对两种不同信令的转换过程进行了研究,并描述了其设计方案。     

基于No.7信令监测系统的网间异常信令分析

本文介绍了如何在No.7信令监测系统中建立各种异常信令的呼叫模型对网间的异常信令进行分析,为基于No.7信令监测系统的数据挖掘和应用提供了借鉴。     

采用"一覆多方式"建设宁夏No.7信令准直联网

本首先介绍了宁夏地区No．7信令网的现状，然后讨论了No．7信令网准直联网的建设思路，其中重点考虑了LSTP的设置方式、信令路由的组织方式、直联链路和准直联链路问的关系，最后给出了呼叫信令接续的一些实例。     

No.7信令链路负荷分担与链路利用率

介绍No.7信令格式、信令链的负荷。     

国内No.7信号方式——2Mbit/s高速信令链路

随着No.7信令在全国范围的普及,使用No.7信令的业务量不断增加,特别是在移动No.7信令网中使用的64kbit/s信令链路已经不能完全适应网上业务量的需求。为了能够使我国No.7信令网合理发展,运营部门和交换设备的厂家提出了对2Mbit/s高速信令链路的需求。该文论述了2Mbit/s信令链路与64kbit/s信令链路的     

Signaling System No.7, IS-41 and cellular telephony networking

Globally, the common channel Signaling System No.7 (SS7) has grown and matured over the past five years in two directions. Outside of the US, the development of CCITT Signaling System No.7 (C7) has grown largely due to the need for modern call completion capabilities in national telephone networks. Within the US, SS7 has evolved from the need to provide fast and reliable database services to the support of the custom calling features to the local exchange carrier (LEC) networks. The 1990s will further accelerate the requirements for network solutions to customer needs, especially in the rapidly growing cellular telephony industry. These network solutions are forcing the merger of call delivery and database services in both the SS7 and C7 worlds. The issues, concerns, and difficulties with the merger of these functions are discussed     

天津网通七号信令集中监测系统

七号信令网是电信网的重要组成部分,其运行质量直接影响到电信网及各种新业务的稳定运行和经济收益。七号信令集中监测系统通过直接采集七号信令的原始数据进行分析处理,提供对七号信令网实时动态监测,以及各种用户信令的各种微观分析。章在分析七号信令集中监测系统框架的基础上,对监测系统的组网结构、系统功能、软件应用做了进一步的研究。     

Signaling System No.7 in corporate networks

Corporate network user requirements are identified. The significance of Signaling System No.7 (SS7), in corporate network as a separate backbone signaling system for implementing a robust, flexible and transparent communication network is discussed. The architecture for a corporate network utilizing enhanced signaling is described. The use of SS7 instead of the integrated services digital network primary rate interface (ISDN PRI) is explored. Some SS7 applications in corporate networks are examined     

No.7信令系统的安全威胁及其防护

No.7信令系统（SS7）是公用电话网的关键支撑系统,SS7网络最初作为封闭网络来设计的,整个网络由运营商完全控制,各实体高度信任。文章分别针对该系统的信令协议、网络节点和来自外部网络的安全威胁进行了分析,并从协议安全、边界防护和内部安全加固三个方面提出了构建信令系统防护体系的方案。     

Signaling System No.7 local exchange deployment

The author examines the deployment of Signaling System No.7 (SS7) from the viewpoint of the local exchange carrier. The three phases of local exchange deployment-service planning and design, local exchange network design, and interconnection design-are discussed in sequence. SS7 is a fundamental change to the infrastructure of the local exchange telecommunications network. The author describes how the backbone network, centered on the signaling transfer points (STPs), is installed first, followed by the local exchange network, and then interconnection to interchange and other networks     

Relationship of the Signaling System No.7 protocol architecture tothe OSI reference model

The relationships that currently exist between the Signaling System No.7 (SS7) and Open Systems Interconnection (OSI) architectures are examined. The functions of each layer in the SS7 protocol stack, as well as the SS7 addressing mechanisms, are described to the extent necessary to show correspondences to those of OSI. Those areas where the two architectures do not align are highlighted. The criteria by which alignment of SS7 with OSI standards is judged are explained. Work in progress in CCITT in defining the evolution of various SS7 application layer standards, where a conscious effort is being made to attempt to align with OSI standards, is described     

Common channel signaling for international service applications

The message transfer, telephone user, and integrated services digital network (ISDN) user parts of CCITT Signaling System No.7 (SS7) are described. The introduction of SS7 to provide control of international circuits is described. The intent is to provide a perspective on the advantages of using common channel signaling for ISDN     

An overview of Signaling System No.7

An overview of Signaling System No.7 (SS7) is presented. The salient features of SS7's network services part (NSP) are described. Functionally, NSP corresponds to the first three layers of the Open System Interconnection (OSI) reference model. The signaling network structures that, in conjunction with the NSP, provide integrated services digital network (ISDN) nodes with a highly reliable and efficient means of exchanging signaling messages are discussed. The nodal capabilities of call control and remote process invocation and management, part of the SS7 user parts, are described. The very stringent performance requirements of signaling systems and their reflection on the critical nature of signaling functions and their real-time exigencies are discussed. The likely evolution of network signaling in the remaining years of the 20th century is discussed     

ALCATEL E10B No.7信令系统简介

针对我国“九五”期间将在全国推广实行Ｎｏ．７共路信令的现实情况，本文就法国ＡＬＣＡＴＥＬ公司依照邮电部颁布的《中国国内电话网Ｎｏ．７信号方式技术规范》所开发的Ｅ１０Ｂ Ｎｏ．７信令系统的结构、特点和运行测试情况作了较详细的介绍，测试结果反映了Ｅ１０Ｂ Ｎｏ．１７信令系统具有性能稳定、功能较强、操作维护方便等优势。     

No．7信令网建设与维护中需要注意的问题

结合天津本地电话网的实际，阐述了在Ｎｏ．７信令网的通信与维护工作中需要注意的问题，对Ｎｏ．７信令的ｌｅｖｅｌ３的功能作了介绍，指出了建设和维护好Ｎｏ．７信令网，对于提高电信网的运行质量和效率有十分重要的意义。