专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4562436A Data communication network 失效
标题翻译：数据通信网络
公开(公告)号：US4562436A
公开(公告)日：1985-12-31
申请号：US399186
申请日：1982-07-16
申请人： Charles L. Coleman , Harvey Rubin
发明人： Charles L. Coleman , Harvey Rubin
IPC分类号： H04M3/30 , H04Q9/00 , H04M3/24
CPC分类号： H04M3/30
摘要： A mechanized system distributing the access, test and communication functions to the pont of testing, typically the centralized switching facility serving the telephone loops and equipment to be tested. Computer (200) stores information about each subscriber loop in the geographical area served by a system. Front-end computers (220,221) interact with computer (200) to retrieve pertinent data regarding loops to be tested. Each switching facility in an area includes a loop testing system (e.g., 160) that implements the required functions. The communication functions residing in front-end computers (220,221) and loop testing systems (160,161) are coupled via a data communication network (140) in a manner that allows any front-end computer to communicate with any loop testing system. Users of the system control access and test from consoles having the capability of establishing independent communication paths over the national dial network for interactive tests in loops accessed through standard test trunks. Microprocessor-based circuitry is utilized for numerous system tasks such as signal generation, digital signal processing and controlling sensitive analog measurements. Signal generation includes digital generation of analog waveforms. Signal processing techniques incorporate various digital filters to analyze sample sequences derived from, for example, dial pulses and coin telephone signals. Sensitive analog measurements of loop characteristics are effected with a magnetic current detector that operates over broad current and frequency ranges. Frequency dependent measurements are converted to DC using synchronous demodulation techniques to enhance resolution.
摘要翻译：将访问，测试和通信功能分配给测试的机械化系统，通常是服务于要测试的电话回路和设备的集中式交换设施。计算机（200）存储关于由系统服务的地理区域中的每个用户环路的信息。前端计算机（220,221）与计算机（200）进行交互以检索关于要测试的循环的相关数据。区域中的每个切换设备包括实现所需功能的环路测试系统（例如，160）。驻留在前端计算机（220,221）和环路测试系统（160,161）中的通信功能通过数据通信网络（140）以允许任何前端计算机与任何环路测试系统通信的方式耦合。系统的用户通过控制台进行访问和测试，具有通过国家拨号网络建立独立通信路径的功能，用于通过标准测试中继线访问的循环中的交互式测试。基于微处理器的电路用于许多系统任务，例如信号生成，数字信号处理和控制敏感的模拟测量。信号发生包括模拟波形的数字生成。信号处理技术包括各种数字滤波器以分析从例如拨号脉冲和硬币电话信号导出的样本序列。使用在宽电流和频率范围内工作的磁流检测器实现环路特性的敏感模拟测量。使用同步解调技术将频率相关测量值转换为直流，以增强分辨率。

IPRDB

热门服务

关于我们

友情链接

联系方式