基于N-ISDN的数字用户终端通信系统的研究与设计
摘要
近年来，随着经济的快速发展，用户对于数据通信业务的需求剧增，大量的小型数字程控交换机产品广泛用于机关、企业和工矿等内部通信量大的社会集团。该类交换机一般具有自动交换、汇接、会议和调度等功能。既能够实现内部呼叫也能接入市话交换网。大多数的设备只支持模拟用户接口，用户和交换机之间的用户线上传输的是模拟信号，速率比较低且衰减大易受干扰。由它组成的专用通信网络以支持语音通信业务为主，业务简单同时功能单一。因此为了克服其在接入网方面的弱点，满足专用网用户越来越高的需求，许多该类交换设备需要进行升级改造。本文中的交换机正属于这类设备。
ISDN用户-网络接口技术是一种先进的用户接口数字化技术，本文正是选择了ISDN(综合业务数字网)作为研制的参考模型。在本校研制的程控交换机的基础上加装数字用户接口板，以实现用户接口的数字化。
本文阐述了ISDN用户-网络接口的基本理论和相关协议。详细分析了数字用户接口板的硬件设计和软件开发方案。本文遵循软硬件相结合的原则，选用了Motorola的MC145572芯片实现N-ISDN在U节点上的物理接入。实现用户线上的全双工数字通信，2B+D的数据传输速率达到144kbit／s。采用PTTA8952P芯片部分实现数字链路层的协议功能。同时选用CPLD(复杂可编程逻辑器件)完成了板上大多数的逻辑实现工作。确保了系统快速、高效、可靠的运行。
升级后的交换机可提供语音、数据、图像等多种业务，能满足用户日益增长的业务需求。同时本文的改造方案具有通用性，对交换机的原有结构基本未做改动，因此很容易就可应用到许多型号的同类设备上去。
In recent years,along with the fast development of economy,the users' demands of data communication is increasing fast,a large number of small scaled digital program-controlled exchange device are widely used by many organizations,corporations and mineral enterprises...ect. The type of these device generally offer the function of auto-exchange,connection,conference and coordinate.They can realize the inner call and can also connect into the public exchange network.Most of them only provide the traditional analog interface to users,analog signal is transmited across the line between the user and the exchange,the rate is lower and is easy to be interfered. So the mainly function offered by the private telecommunication network built up with them is limited only in voice service fields.The Service is simple and the function is simplex.Therefore for overcoming the weakness of network connecting,and satisfy the increasing demands of users in the private telecommunication network,many of these exchange device should be reformed or upgraded.The exchange in this thesis belongs to this type.
ISDN(Intergrated Services Digital Network)User-Network technique is a kind of advanced technique of user interface numerical. So this paper chooses ISDN exchange as reference model and gives the full resolution.We add the digital user interface board to the program-controlled exchange developed by our own school to realize the numerical of the user interface.
This paper expound the basic theories and related protocol of ISND User-Network interface and analyze the project of designing the hardware and software of the digital user interface board.This paper follows the principle which combines hardware and software.choose MC145572 which produced by Motorola to carry out the physical connection on the U node of N-ISDN.Realize the whole ambilateral communication on the user line and the 2B+D data rate reaches to 144kbit/s.Adopt PT7A8952P to carry out part of the protocol on data link level. Most of the logic work are carry out by CPLD(Complex Programmable Logic Device) on the board to insure the fastly,efficiently and dependable of the system,
After getting reformed,the exchange can offer voice,data,image transmission services.It can satisfy the increasing user demands.Meanwhile the resolution discussed by this paper keeps the old exchange framework at the most benefits and can be applied to other model small scaled digital program-controlled exchange easily.
ISDN用户-网络接口技术是一种先进的用户接口数字化技术，本文正是选择了ISDN(综合业务数字网)作为研制的参考模型。在本校研制的程控交换机的基础上加装数字用户接口板，以实现用户接口的数字化。
本文阐述了ISDN用户-网络接口的基本理论和相关协议。详细分析了数字用户接口板的硬件设计和软件开发方案。本文遵循软硬件相结合的原则，选用了Motorola的MC145572芯片实现N-ISDN在U节点上的物理接入。实现用户线上的全双工数字通信，2B+D的数据传输速率达到144kbit／s。采用PTTA8952P芯片部分实现数字链路层的协议功能。同时选用CPLD(复杂可编程逻辑器件)完成了板上大多数的逻辑实现工作。确保了系统快速、高效、可靠的运行。
升级后的交换机可提供语音、数据、图像等多种业务，能满足用户日益增长的业务需求。同时本文的改造方案具有通用性，对交换机的原有结构基本未做改动，因此很容易就可应用到许多型号的同类设备上去。
In recent years,along with the fast development of economy,the users' demands of data communication is increasing fast,a large number of small scaled digital program-controlled exchange device are widely used by many organizations,corporations and mineral enterprises...ect. The type of these device generally offer the function of auto-exchange,connection,conference and coordinate.They can realize the inner call and can also connect into the public exchange network.Most of them only provide the traditional analog interface to users,analog signal is transmited across the line between the user and the exchange,the rate is lower and is easy to be interfered. So the mainly function offered by the private telecommunication network built up with them is limited only in voice service fields.The Service is simple and the function is simplex.Therefore for overcoming the weakness of network connecting,and satisfy the increasing demands of users in the private telecommunication network,many of these exchange device should be reformed or upgraded.The exchange in this thesis belongs to this type.
ISDN(Intergrated Services Digital Network)User-Network technique is a kind of advanced technique of user interface numerical. So this paper chooses ISDN exchange as reference model and gives the full resolution.We add the digital user interface board to the program-controlled exchange developed by our own school to realize the numerical of the user interface.
This paper expound the basic theories and related protocol of ISND User-Network interface and analyze the project of designing the hardware and software of the digital user interface board.This paper follows the principle which combines hardware and software.choose MC145572 which produced by Motorola to carry out the physical connection on the U node of N-ISDN.Realize the whole ambilateral communication on the user line and the 2B+D data rate reaches to 144kbit/s.Adopt PT7A8952P to carry out part of the protocol on data link level. Most of the logic work are carry out by CPLD(Complex Programmable Logic Device) on the board to insure the fastly,efficiently and dependable of the system,
After getting reformed,the exchange can offer voice,data,image transmission services.It can satisfy the increasing user demands.Meanwhile the resolution discussed by this paper keeps the old exchange framework at the most benefits and can be applied to other model small scaled digital program-controlled exchange easily.
引文
[1]．赵慧玲，综合业务数字网技术及其应用，人民邮电出版社，1995
[2]．阮永良，综合业务数字网，中国铁道出版社，1995
[3]．程时瑞，综合业务数字网，人民邮电出版社，1993
[4]．李正福，综合业务数字网-ISDN，人民邮电出版社，1993
[5]．程时瑞，综合业务数字网，人民邮电出版社，1997
[6]．陈太一，骆如楠，方守清等，综合业务数字网导论，人民邮电出版社，1992
[7]．王兴亮等，数字通信原理与技术，西安电子科技大学出版社，2000
[8]．叶敏，程控数字交换与现代通信网，北京邮电大学出版社，1998
[9]．陈锡生等，现代电信交换，北京邮电大学出版社，1999
[10]．乐正友等，程控交换与综合业务通信网，清华大学出版社，1999
[11]．乐正友等，程控数字交换机硬件软件及其应用，清华大学出版社，1991
[12]．张俊谟，单片机中级教程．原理与应用，北京航空航天大学出版社，2002
[13]．蔡美琴等，MCS-51系列单片机系统及其应用，高等教育出版社，1992
[14]．马忠梅，单片机的C语言应用程序设计，北京航空航天大学出版社，2001
[15]．赵亮等，单片机C语言编程与实例，人民邮电出版社，2003
[16]．黄正瑾等，CPLD系统设计技术入门与应用，电子工业出版社，2002
[17]．钱志军等，MC145572 ISDN U接口收发器与MCl45572 ISDN S/T接口收发器用户手册，人民邮电出版社，1998
[18]．深圳市华为技术有限公司，C&C08数字程控交换系统，人民邮电出版社，1997
[19]．孙云开，一种适用于小型数字程控交换机的ISDN接口研制，南京师范大学，2002
[20]．周冰，基于N-ISDN接入多媒体通信系统研究，四川大学，2003
[21]．李伟，ISDN终端适配器系统软件设计，西安电子科技大学，1999
[22]．刘琳，我国N-ISDN的发展，电信技术，2001．5：13-15
[23]．樊庆福，N-ISDN业务介绍，现代通信，2000．5：15-16
[24]．韩薇，孟庆昌，ISDN用户网络接口中原语动作序列研究，北京邮电大学学报，1995，18(3)：88-92
[25]．ISDN用户．网络接口数据链路层技术规范，邮电部电信传输研究所，1997
[26]．ISDN用户．网络接口第三层基本呼叫控制技术规范，邮电部电信传输研究所，1998
[27]．陈海健，利用IUA协议实现ISDN信令的传送，南京理工大学，2004
[28]．史文玮，铁路综合业务数字调度通信系统的研究，天津大学，2005
[29]．周航，数字调度2B+D接口及网管系统研究，兰州铁道学院，2000
[30]．梁国和，ISDN基群速率接口物理层及数据链路层实现，兰州铁道学院，2000
[31]．徐北鸥，S1240程控交换机实现局间ISDN功能的研究，沈阳工业大学，1999
[32]. W.Stallings.Advanced in Integrated Services Digital Network(ISDN) and Broadband ISDN,IEEE, 1992
[33]. J.Luetchford,CCITT Recommendations on the ISDN,A Review, IEEE Journal on Selected Areas in Communication,May 1986
[34]. W.Gifford,ISDN User-Network Interfaces,IEEE Journal on Selected Areas in Communication,May 1986
[35]. N.Duc,E.Chew.ISDN Protocol Architecture,IEEE Communication Maganize,March 1986
[36]. Freescale, MC 145572 ISDN U-Interface Transceiver DataSheet, 1998
[37]. Pericom, PT7A8952P HDLC Controller DataSheet, PT0012(01/00)
[38]. Mitel, MT8980D Digital Switch DataSheet,Mitel Semiconductor's ISO-CMOS ST-BUS FAMILY
[39]. ALTERA, MAX7000 Programmable Logic Device Family DataSheet, 2001
[40]. ITU-T Recommendation X.25, 1996
[41]. ITU-T Recommendation 1.430,Basic User-Network Interface-Layer 1 Specification, 1995
[42]. ITU-T Recommendation Q.921,ISDN user-network interface Data link layer specification, 1993
[43]. ITU-T Recommendation Q.931,ISDN user-network interface layer 3 specification for basic call control, 1993
[2]．阮永良，综合业务数字网，中国铁道出版社，1995
[3]．程时瑞，综合业务数字网，人民邮电出版社，1993
[4]．李正福，综合业务数字网-ISDN，人民邮电出版社，1993
[5]．程时瑞，综合业务数字网，人民邮电出版社，1997
[6]．陈太一，骆如楠，方守清等，综合业务数字网导论，人民邮电出版社，1992
[7]．王兴亮等，数字通信原理与技术，西安电子科技大学出版社，2000
[8]．叶敏，程控数字交换与现代通信网，北京邮电大学出版社，1998
[9]．陈锡生等，现代电信交换，北京邮电大学出版社，1999
[10]．乐正友等，程控交换与综合业务通信网，清华大学出版社，1999
[11]．乐正友等，程控数字交换机硬件软件及其应用，清华大学出版社，1991
[12]．张俊谟，单片机中级教程．原理与应用，北京航空航天大学出版社，2002
[13]．蔡美琴等，MCS-51系列单片机系统及其应用，高等教育出版社，1992
[14]．马忠梅，单片机的C语言应用程序设计，北京航空航天大学出版社，2001
[15]．赵亮等，单片机C语言编程与实例，人民邮电出版社，2003
[16]．黄正瑾等，CPLD系统设计技术入门与应用，电子工业出版社，2002
[17]．钱志军等，MC145572 ISDN U接口收发器与MCl45572 ISDN S/T接口收发器用户手册，人民邮电出版社，1998
[18]．深圳市华为技术有限公司，C&C08数字程控交换系统，人民邮电出版社，1997
[19]．孙云开，一种适用于小型数字程控交换机的ISDN接口研制，南京师范大学，2002
[20]．周冰，基于N-ISDN接入多媒体通信系统研究，四川大学，2003
[21]．李伟，ISDN终端适配器系统软件设计，西安电子科技大学，1999
[22]．刘琳，我国N-ISDN的发展，电信技术，2001．5：13-15
[23]．樊庆福，N-ISDN业务介绍，现代通信，2000．5：15-16
[24]．韩薇，孟庆昌，ISDN用户网络接口中原语动作序列研究，北京邮电大学学报，1995，18(3)：88-92
[25]．ISDN用户．网络接口数据链路层技术规范，邮电部电信传输研究所，1997
[26]．ISDN用户．网络接口第三层基本呼叫控制技术规范，邮电部电信传输研究所，1998
[27]．陈海健，利用IUA协议实现ISDN信令的传送，南京理工大学，2004
[28]．史文玮，铁路综合业务数字调度通信系统的研究，天津大学，2005
[29]．周航，数字调度2B+D接口及网管系统研究，兰州铁道学院，2000
[30]．梁国和，ISDN基群速率接口物理层及数据链路层实现，兰州铁道学院，2000
[31]．徐北鸥，S1240程控交换机实现局间ISDN功能的研究，沈阳工业大学，1999
[32]. W.Stallings.Advanced in Integrated Services Digital Network(ISDN) and Broadband ISDN,IEEE, 1992
[33]. J.Luetchford,CCITT Recommendations on the ISDN,A Review, IEEE Journal on Selected Areas in Communication,May 1986
[34]. W.Gifford,ISDN User-Network Interfaces,IEEE Journal on Selected Areas in Communication,May 1986
[35]. N.Duc,E.Chew.ISDN Protocol Architecture,IEEE Communication Maganize,March 1986
[36]. Freescale, MC 145572 ISDN U-Interface Transceiver DataSheet, 1998
[37]. Pericom, PT7A8952P HDLC Controller DataSheet, PT0012(01/00)
[38]. Mitel, MT8980D Digital Switch DataSheet,Mitel Semiconductor's ISO-CMOS ST-BUS FAMILY
[39]. ALTERA, MAX7000 Programmable Logic Device Family DataSheet, 2001
[40]. ITU-T Recommendation X.25, 1996
[41]. ITU-T Recommendation 1.430,Basic User-Network Interface-Layer 1 Specification, 1995
[42]. ITU-T Recommendation Q.921,ISDN user-network interface Data link layer specification, 1993
[43]. ITU-T Recommendation Q.931,ISDN user-network interface layer 3 specification for basic call control, 1993