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众所周知,目前的窄带ISDN是在电话综合数字网(IDN)基础上发展起来的,ISDN 交换机一般也是由用于IDN 的数字程控交换机改进而成的。交换机起着用户与网路接口、综合交换各种业务的重要作用,是ISDN 的核心。一般的数字交换机只有进行电路交换的功能,而ISDN 要求交换机允许多种业务数字接入,并能够进行D 信道处理、64kb/s 电路交换、分组交换以及与其它网互通。下面介绍ISDN 交换系统的一般技术要求,并以AXE-10交换机为例,分析ISDN 功能的实现。
As we all know, the current narrow-band ISDN is based on the Integrated Telephone Network (IDN) developed, ISDN switches are generally used by IDN for digital program-controlled switches improved. Switch plays a user and network interface, a comprehensive exchange of all kinds of business important role is ISDN core. While a typical digital switch has only circuit switching capabilities, ISDN requires that the switch allow multiple service digital accesses and be capable of D-channel processing, 64kb / s circuit switching, packet switching, and interworking with other networks. The following describes the general technical requirements of the ISDN switching system. Taking the AX-10 switch as an example, we analyze the implementation of the ISDN function.