华为C＆CO8交换机常见故障的处理

作为一名交换机的维护人员，在遇到交换机故障时，首先应对故障现象进行正确的分析和判断，然后通过测试诊断和其他作业对故障进行正确处理，而不是简单地对某些单板进行掉电和插拔。根据我们的摸索，华为C&C08交换机的常见故障主要有不能正常呼叫、No郾1信令转No郾7信令接续不通、接通率突然下降、拨打长途出现串音等问题。现对这些问题分别做一简要探讨。1不能正常呼叫出局和入局电话对于不能正常呼叫出局和入局电话的问题，我们可以分为以下5类。现象1：出局和入局电话全部不能呼叫。处理方法：如果所有用户都不能打通出局电话（开局时…     

C&C08进入北京本地网

北京市电信管理局订购24万门深圳市华为技术有限公司Ｃ＆Ｃ08数字程控交换机的合同已签字。北京拟新建电话端局1个,远端用户模块4个,以及与其配套的操作维护设备。交换设备的总容量为23900门线。Ｃ＆Ｃ08程控交换机是华为公司研制的国产大容量交换机,具有自主知识产权,经过近年持续改进,推出了许多新功能,其中包括:集中交换功能、公司电话卡、呼叫中心区域无线漫游、主叫号码显示、Ｖ52接口、ＩＳＤＮ业务和功能、智能网业务和功能等。Ｃ＆Ｃ08已为天津、广州、深圳等城市提供这类业务功能,用户反应较好。C&C08进入北京本地网…     

C＆C08交换机的维护经验

博兴县电信局使用的交换机设备为华为C&C08数字程控交换机，该设备提供测试维护工具，如接续动态跟踪、信令跟踪、话单跟踪等，维护人员可方便定位各类呼叫不成功、局间信令不畅等故障的原因。通过话单跟踪，可以查找计费故障、计费数据设置错误以及不能计费等问题。笔者以自身工作为基础介绍几点华为C&C08交换机的维护经验，供业界交换设备维护工程师参考。一、灵活设置数据随着电信市场竞争的日益激烈，如何满足用户的个性化需求成为各种电信运营商取得竞争优势的重要保证。C&C08机数据设置比较灵活，可以针对各种不同用户需求进行灵活…     

电信交换技术、 交换机与交换系统

0016655C&C08程控交换机仿真训练系统[刊]/于跃龙//电信科学.—2000,16(3).—45～46(B)本文介绍了 C&C08程控交换机仿真训练系统的总体框图及其在硬件配置、数据管理、呼叫仿真这三部分的实现。0016656S1240系统五种紧急状态的应急措施[刊]/胡建平//电信科学.—2000,16(2).—45～47(K)0016657数字程控交换机会议终端的几点关键技术[刊]陈鹏//现代通信技术.—2000,(1),—27～29(C)本文主要介绍了数字程控交换外接式十方会议终端的工作原理,其中详细介绍了模拟摘机、保持电路以及忙音检测的实现方法。0016658HKX-1000B 交换机计费故障的处理[刊]/王中华//     

话音型增值业务和信息服务业务

由于电话网的数字化,特别是与计算机的结合,使电话业务的服务功能迅速加强,产生了大量电话新业务。如:在程控数字交换机中开发的转移呼叫、三方通话、遇忙等待、叫醒等十多种新业务;在电话网上加挂计算机,有的称之为语音平台,可以开发语     

C＆C08交换机SM模块工作原理

SM模块具有独立交换功能,可以完成模块内的呼叫接续,而模块间的呼叫则由各SM通过AM／CM来完成。SM还提供分散数据库管理、呼叫处理、维护操作等各种功能,用户可以不通过AM／CM,通过串口直接在SM侧进行近端维护。SM是C＆C08数字程控交换机的核心,是各种业务接口的提供者,根据SM所提供的接口可把它分为纯用户模块（USM）、纯中继模块（TSM）、用户中继混装模块（UTM）三种类型。USM（User Switch Module）只提供用户接口,TSM（Trunk Switch Module）只提供中继接口,UTM（User Trunk Module）提供用户和中继两种接口。C＆C08系统还有多种远端模块——RSM、RSMII、SMII,它们都可以看作SM的其他形式或者是附加于SM之上的功能块。     

C&C08程控交换机仿真训练系统

本文介绍了C &C08程控交换机仿真训练系统的总体框图及其在硬件配置、数据管理、呼叫仿真这三部分的实现。     

什么是“软交换”？

软交换是指软交换机，也称为呼叫代理、呼叫服务器或媒体网关控制器。软交换是NGN的控制功能的实现，为NGN提供实时性业务的呼叫控制和连接控制功能，是NGN呼叫与控制的核心。软交换技术作为业务／控制与传送／接入分离思想的体现，是NGN体系结构中的关键技术，其核心思想是硬件软件化，通过软件方式实现原来交换机的控制、接续和业务处理等功能，各实体之间通过标准的协议进行连接和通信，     

交换机与外置鉴权平台接口的设计和实现

随着电信运营市场格局的变化,作为不同运营网络之间的汇接点,关口局是实现跨网业务鉴权功能的关键,它在电信运行网中的作用显得越来越重要。文中介绍了基于S1240 交换机系统实现外置鉴权平台的方案。以 S1240 交换机中的扩展外围模块(EPM )为主,阐述交换机与外置鉴权平台在接口上的的设计思路、体系结构、消息流程和系统呼叫流程;以双振铃业务作为实际应用例子,说明通过这种设计可以很方便地扩展到其他各类鉴权业务(例如黑白名单、呼叫鉴权和呼叫监听等),为增强关口局的功能提供灵活、强大的手段。     

智能网故障处理—例

1网络架构秦皇岛SSP是河北省华为TELLIN智能网的重要组成部分,也是本地网内交换机与智能网相连接的枢纽,其网络架构如图1所示。它采用华为C&C0832模块交换机,版本号为6郾10R005M2023。华为C&C0832模块交换机要求分配在不同模块的中继电路要分配在不同的中继群中。2故障案例用户经常投诉201卡、17908卡等智能业务在22∶00左右不好用。为此,我们分析了各局到智能网的中继群入局话务测量数据,发现24中继群(至32局)和54中继群(至85局)在每天的忙时22∶00左右接通率极低。这两个中继群都在SM4上,且SM4中只有这两个中继群。考虑到85局和32…     

Network and System Architecture: The Integrated Approach to ISDN in the UT Line

The paper presents an approach to ISDN suitable both for a pilot service, to be carried out in the near future in Italy, and for long-term developments with a high degree of penetration of ISDN setvices. Integration of ISDN services in the digital telephone exchange "UT" has taken place at all levels: system architecture, subscriber access structure, circuit connecting network, transmission links, call processing, and 0 & M functions. We also describe a new protocol that facilitates the dialog between exchange modules and between different exchanges for the data service. It is suitable for implementing packet transit switches with low complexity, high throughput, and low transit time. A special peripheral-handling processor handles the most repetitive functions of the protocols both in the local exchange and in other parts of the network, while the exchange central processor performs the ISDN call-handling functions; the same peripheral processors and the same module processor are used for both ISDN and telephone services. Finally, the paper shows how this architecture can evolve to include new wide-band services and new techniques to implement high-capacity fast packet switches.     

A direct signaling system for flexible access and deployment oftelecommunication services

In current telecommunication networks, the value-added services available to subscribers are almost exclusively offered by the carrier providing local telephony service. This results from two factors: the processing for services is either based in or triggered from software executing on the access telecommunication switches, and signaling links over which subscribers request services are terminated on these access switches. In a direct signaling system, the signaling link from a subscriber does not necessarily terminate on an access switch, but rather on an intelligent server we call a call server. The call server invokes service functions and coordinates their interactions. This direct signaling system may be overlaid on various types of access networks, including circuit-switched telephony, packet telephony, wireless local loop, cable, etc. We discuss the design, implementation, and performance of a direct signaling system, including procedures that provide varying amounts of integration with current telecommunication systems. Our results show that a direct signaling system using a low-delay direct signaling link and in which no changes are made to existing telecommunicatione switches incurs approximately 100 ms higher postdial delay than a standard ISDN system. A direct signaling system in which telecommunication switches provide open interfaces and coordinate processing with direct signaling servers incurs approximately 100 ms lower postdial delay than a standard ISDN system     

Automatic event‐triggered call‐forwarding mechanism for mobile phones

Call forwarding is a traditional telecom service that allows a user to forward incoming calls to another telephone number. This service requires the user to manually activate and deactivate the feature and therefore may not be very convenient. This paper proposes an automatic call‐forwarding algorithm (CFA) for mobile phones. By installing a software in a smartphone, call forwarding is automatically triggered (e.g., when the phone is plugged in a charger or is turned off) or disabled (e.g., when the phone is unplugged from the charger or is turned on). We investigate the performance of the CFA through analytic analysis, simulation, and measurement. Our study indicates that CFA is very feasible for commercial usage. Copyright © 2011 John Wiley & Sons, Ltd.     

基于软交换的一种通用呼叫控制模型的研究

现有的呼叫控制模型不能满足多媒体与移动业务对承载的复杂控制需求.本文在不增加现有模型复杂度的前提下提出一种通用的两层、信令-承载控制相分离的呼叫控制模型SBS-CSM.SBS-CSM在核心会话控制模块完成协议无关的通用呼叫控制功能,并将信令链接与媒体链接的控制分离,将二者的控制能力独立的提供给业务.在协议接入处理模块完成具体协议的媒体链接控制功能.采用该模型的软交换系统的实测结果验证了该模型的可用性与高效性.     

A Study of Feature Interactions in Intelligent Networks

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Demand assignment multiple access and dynamic channel allocationstrategies for integrating radio dispatch and telephone services overmobile satellite systems

The authors discuss the performance analyses of a novel demand assignment multiple access (DAMA) scheme addressing the special characteristics of the mobile radio service (MRS), and a new method for dynamically allocating a common pool of channels to both MRS and mobile telephone service (MTS) to improve channel utilization. The new DAMA scheme makes use of call queuing, batch processing, and pipelined signaling to minimize call setup overhead for MRS traffic. MRS call setup delays were analyzed by simulation modeling of a mobile satellite system (MSS) with many mobile voice-dispatch networks operating over a multiple spot beam satellite to investigate the effects of traffic volume, batch size, and batch service disciplines. A reserved channel margin algorithm for dynamic channel allocation was shown to be effective in harmonizing the different call setup performance requirements for MTS and MRS. Numerical results show that dynamic channel allocation applied to a common pool of 40 channels enables a 20-25% increase in the number of mobile terminals compared with a fixed allocation of 20 channels to each of the two services     

An overview of selected call processing patterns

The call processing component of a switching system is responsible for setting up basic calls between external interfaces and for providing a broad range of supplementary services such as call forwarding, conference calling, and call waiting. This article discusses software design techniques that address some of the challenges faced when developing a call processing system. Each of these techniques is presented as a pattern, a term adopted by the software design community     

Wireless and cellular architecture and services

Cellular architecture partitioning can improve the performance of telecommunications systems. The model proposed by the author allows for changing the cell size for different services and the number of users. The cell size that will ensure the best possible performance and quality of service can be derived by the model. The main task of a telecommunication system is call processing. This includes identifying incoming calls, establishing a communication path for the duration of the connection, and disconnecting the call after the conversation has ended. Call processing uses different components of the software architecture and involves processes and messages performing different functions and accessing various resources. In addition, the system requires administration and maintenance that also involves processes using different resources     

IP分布式呼叫中心在检察系统的应用

IP分布式呼叫中心结合了互联网技术,可以完美的将传统呼叫中心业务和基于互联网的新型服务方式融合在一起。由于采用了VoIP及软件交换技术,处理能力大幅度提升,不仅能够为电话用户和因特网用户提供统一的客户服务,并且较之前几代呼叫中心技术,在功能实现及降低投入方面优势明显。为了服务山东省检察机关遍布全省所有地市、区县的各级检察院,通过在省院建设软件、硬件、数据大集中的IP分布式呼叫中心,与各地分支机构建立安全的vPN隧道,部署远端IP坐席,运行统一的业务软件,保证了系统的标准性、规范性和完整性,更加利于统一管理和资源合理配置,并有效降低了整个系统的建设和运营成本。     

Performance analysis of a telephone system with both patient and impatient customers

In this paper, the performance of a telephone system in which there are both patient and impatient customers is studied. Depending on the waiting time in the buffer, a customer may become impatient and therefore the call is incomplete. An impatient customer still consumes real processing time. The impact of impatient customers on the system is much more remarkable than people would expect. We formulate this model as a queueing system with a finite buffer. The status of a customer, i.e. whether patient or impatient, depends on the waiting time in the buffer and the service time is different for the different type of customers. The joint distribution of the numbers of patient and impatient customers in the system is obtained for the system in equilibrium. Expressions of many performance measures, including the average number of patient customers or impatient customers in the system, the average length of the service time, the average arrivals during a service period, and the proportion of the useful service time contributing towards patient customers' service, can be expressed in terms of the joint probabilities. The waiting time probabilities and the average waiting time of a customer in the buffer and the probability that a customer will be served as a patient customer are also obtained. Numerical examples are presented.