综合业务数字网ISDN与异步传输模式ATM

ＩＳＤＮ技术是一种通过综合数字电话网提供端到端的数字化连接，用以承载包括话音，数据、图象，传真和视频在内的多种电信业务的广域网通信技术。ＡＴＭ网络技术采用的是面向连接的技术。具有较大的灵活性，ＡＴＭ网络可以集成处理各种通信流量，如声音，视频和多媒体信息等，无论是局域网（ＬＡＮ）还是广域网（ＷＡＮ）环境都可以使用相同的“ＡＴＭ标准，从而可以实现多具网络之间的无缝连接，提高网络的吞吐量，ＡＴＭ将是未来

Both Synthetical Digital Telephone Network and Advenchronous Transfer Mode

ISND is a kind of communication techology.By synthetical digital telephone network it furnishes the sort of link from terminal to terminal,and it is a kind of communication techology of wide area network applying multi telecommunication services for undertaking sound,digit,picture,fax,and video etc.ATM network techology is aimedat at the technique of link which has a great fexibility.ATM network can deal with various communication information together,like sound,video,and multi media etc.Either LAN or WAN circumstance can apply the same standard of ATM.Therefor it makes gapless link become a reality,and improve the handling capacity of a network.ATM will be a kind of hopeful network techology which occupies first place in digit,digital transmission and exchange in the future.