对公共信道信令系统中的综合业务数字网用户部分（ISUP）和电话用户部分（TUP）进行了简单的比较。
The simple comparison is made between Integrated Server Digital Network User Part (ISUP) and Telephone User Part (TUP) in this paper.
先进的数字移动通信技术、sdh光通信系统技术、密集波分复用技术得到广泛采用，宽带综合业务数字网、at m宽带交换系统等高新技术正在网上试验。
Advanced technologies like digital mobile communications, SDH, dense WDM, etc. have found wide application and high and new technologies like B-ISDN and ATM are on trial over the network.
该系统为船—岸通信提供了新的综合业务数字网和MPDS服务，该服务的按传输量计费使船舶能够始终在线连接到互联网，具有非常广阔的应用潜能。
The MPDS service charged according to transmitted data volume, and it enables the vessels to be online to the Internet all time and provides wide range of potential applications.
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