D4数字信道库系列:数据端口-数字数据系统56-kb/s速率的信道单元

B. Dunbar, D. Gupta, M. P. Horvath, R. E. Sheehey, S. Verma
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引用次数: 2

摘要

对高速数据服务的需求日益增长,因此需要让更多的客户使用数字数据系统(DDS)。为了提供最高DDS速率56kb /s的服务,已经开发了“数据端口”信道单元,使用D4终端在t载波线路上扩展DDS网络信道。这些56kb /s的数据端口单元为服务较小的横截面数据用户提供了一种灵活而经济的安排,并利用一种编码方案进行纠错,从而不必特别选择线路(针对错误率)。本文描述了56kb /s数据端口单元的设计,而本文所引用的文章则讨论了数据端口系统问题和低速数据端口单元的设计。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
D4 Digital Channel Bank Family: Dataport — Channel units for digital data system 56-kb/s rate
Increasing demand for high-speed data services makes it desirable to give more customers access to the Digital Data System (DDS). To provide service at 56 kb/s, the highest DDS rate, “dataport” channel units have been developed to extend DDS network channels over T-carrier lines, using D4 terminals. These 56-kb/s dataport units offer a flexible and economical arrangement for serving smaller cross sections of data subscribers, and make use of a coding scheme for error correction that makes special selection of lines (for error rate) unnecessary. We describe the design of 56-kb/s dataport units, while articles referenced herein discuss dataport system questions and the design of lower speed dataport units.
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