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    • 2. 发明授权
    • Distributed digital loop system with trunk unit interface
    • 具有中继单元接口的分布式数字环路系统
    • US5592475A
    • 1997-01-07
    • US163258
    • 1993-12-07
    • Alexandru S. GligaStephen H. Diaz
    • Alexandru S. GligaStephen H. Diaz
    • H04M19/00H04Q3/60H04Q11/04
    • H04Q3/60
    • A digital loop system with a distributed architecture that provides telephone services with high reliability and quality and is cost-effective to install. The system is central office powered and uses a trunk unit interface to interface with a wide range of mechanical and electronic switches. The trunk unit interface connects to remote terminals via digital transmission lines. The remote terminals drive a large number of subscriber circuits through short subscriber loops. The distributed digital loop system employs sealed and environmentally hardened packaging for flexible outdoor installation. The electronic circuitry used by the remote terminals is divided into modules for flexible, incremental deployment of the system.
    • 具有分布式架构的数字环路系统,可提供高可靠性和高质量的电话服务,并具有成本效益的安装。 该系统是中央办公室供电的,并且使用中继线单元接口与各种机械和电子开关接口。 主干单元接口通过数字传输线连接到远程终端。 远程终端通过短用户环路驱动大量用户电路。 分布式数字环路系统采用密封和环保型封装,灵活的户外安装。 远程终端使用的电子电路被分为模块,用于系统的灵活,增量部署。