论文部分内容阅读
对现存的各种通信网来说，存在着用户线利用率低、不易导入新的通信业务、浪费号码资源等缺点，综合业务数据网（ＩＳＤＮ）则可以克服上述缺点，吸收、综合现有的各种公用网的业务，并以数字统一处理各种通信业务。文中阐述了程控数字交换机ＩＳＤＮ化的原理和方法，尔后从硬件到软件具体说明了ＮＥＡＸ６１系统怎样支持ＩＳＤＮ的详细方法。
For existing communication networks, there are shortcomings such as low utilization of subscriber lines, difficulty in importing new communication services, and waste of number resources. Integrated Services Digital Network (ISDN) can overcome the above shortcomings and absorb and integrate existing A variety of public network business, and digital unified handling of various communications services. This paper describes the program-controlled digital ISDN switches and the principles and methods, and then from hardware to software specific instructions NEAX61 system how to support the detailed method of ISDN.