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    Arrangement for testing telephone subscriber line circuit via B-ISDN channel linking central office test system and metallic channel unit installed in digital loop carrier remote terminal
    11.
    发明授权
    Arrangement for testing telephone subscriber line circuit via B-ISDN channel linking central office test system and metallic channel unit installed in digital loop carrier remote terminal 失效
    通过连接中心局测试系统和安装在数字环路载波远程终端中的金属通道单元的B-ISDN通道测试电话用户线电路的安排

    公开(公告)号：US5680391A

    公开(公告)日：1997-10-21

    申请号：US492507

    申请日：1995-06-20

    Applicant: Joseph E. Barron ,  Onofrio Schillaci

    Inventor： Joseph E. Barron ,  Onofrio Schillaci

    IPC: H04Q11/04 ,  H04J1/16

    CPC classification number: H04Q11/045 ,  H04M3/303

    Abstract: A subscriber line circuit test and conditioning arrangement for use with a non-metallic (fiber optic) digital communication path-based digital communication network employs a single (basic rate ISDN) metallic channel unit (BMCU) installed at a site terminating the fiber optic communication path. A BMCU communicates with a central office test system using an auxiliary B-ISDN communication `test` channel portion (2B+D) channels of the time division multiplexed digital communication DS0 channels. Digital command and response signals are transported by the two ISDN bearer (B) channels and are coupled directly to tip and ring digital signal processors in the central office test system, without the need for intermediate digital-to-analog and analog-to-digital conversion by a metallic channel unit at a central office terminal, and that additionally performed by a central office terminal and central office switch. The data (D) channel is employed to conduct access, calibration and control communications with the metallic channel unit.

    Abstract translation: 用于非金属（光纤）数字通信路径的数字通信网络的用户线电路测试和调理装置采用安装在终端光纤通信的站点处的单个（基本速率ISDN）金属信道单元（BMCU） 路径。 BMCU使用时分复用数字通信DS0信道的辅助B-ISDN通信“测试”信道部分（2B + D）信道与中心局测试系统进行通信。 数字命令和响应信号由两个ISDN承载（B）信道传输，并且直接耦合到中心局测试系统中的尖端和环形数字信号处理器，而不需要中间的数模转换器和模数转换器 由中央办公室终端处的金属通道单元进行转换，另外由中心局终端和中心局交换机执行。 采用数据（D）通道进行与金属通道单元的通信，校准和控制通信。

    Subscriber line test system
    14.
    发明授权
    Subscriber line test system 失效
    用户线路测试系统

    公开(公告)号：US5410585A

    公开(公告)日：1995-04-25

    申请号：US948446

    申请日：1992-09-22

    Applicant: Satoru Kawaharata

    Inventor： Satoru Kawaharata

    IPC: H04M3/26 ,  H04M3/30 ,  H04Q11/04 ,  H04M3/32

    CPC classification number: H04Q11/045 ,  H04M3/303

    Abstract: A method and apparatus for testing a subscriber line of a communication exchange. A telephone coupled to the subscriber line is used to dial first and second specified telephone numbers to couple the subscriber line to a bit error rate measurement device, housed in a talking circuit switch, and to designate channels of the subscriber line to be tested. The bit error rate measurement device transmits bit error rate measurement signals through the designated channels and uses these bit error rate measurement signals to generate bit error rate signals indicating the bit error rates of the channels. The bit error rates are represented as audible sounds transmitted to the telephone. Accordingly, it is possible to start the test from customer station equipment, to evaluate the quality of digital transmission through the channels, and to specify the fault points of the channels by repeating bit error rate measurements in different channel paths.

    Abstract translation: 一种用于测试通信交换机的用户线路的方法和装置。 耦合到用户线路的电话用于拨打第一和第二指定的电话号码以将用户线路耦合到容纳在通话电路交换机中的误码率测量设备，并且指定要测试的用户线路的频道。 误码率测量装置通过指定的信道发送误码率测量信号，并使用这些误码率测量信号来产生指示信道的误码率的误码率信号。 误码率表示为发送到电话的可听见的声音。 因此，可以从客户站设备开始测试，通过信道评估数字传输的质量，并通过重复不同信道路径中的误码率测量来指定信道的故障点。

    Testing of subscriber loop pair gain systems
    18.
    发明授权
    Testing of subscriber loop pair gain systems 失效
    用户环路对增益系统的测试

    公开(公告)号：US4270030A

    公开(公告)日：1981-05-26

    申请号：US97699

    申请日：1979-11-27

    Applicant: Stephen J. Brolin ,  Jeffrey L. Gottesman ,  Dennis H. Morgen ,  Kenneth H. Swanson

    Inventor： Stephen J. Brolin ,  Jeffrey L. Gottesman ,  Dennis H. Morgen ,  Kenneth H. Swanson

    IPC: H04M3/30 ,  H04B3/46 ,  H04J3/14

    CPC classification number: H04M3/303 ,  H04M3/30

    Abstract: A testing system is disclosed for telephone subscriber loops which are in part derived by multiplex facilities in what have come to be known as pair gain systems. In this testing arrangement, the local drop wires from the remote terminal of the pair gain system to the subscriber are separated from the carrier system itself and tested by connecting them to a separate metallic pair extending from the central office to the remote terminal location. Simultaneously, the carrier-derived portion of the subscriber loop is connected to automatic testing apparatus which sequences through a plurality of automatic tests for not only transmission characteristics of the carrier-derived channel but also tests for the ability of the derived channel to transmit supervisory information such as ringing, coin control and party identification information. The remote terminal of the pair gain channel is selectively terminated by a reflective or absorptive termination to assist in these testing procedures. The testing system is designed so as to make carrier-derived channels appear to the central office testing personnel as if they were identical to metallic loops, thus saving considerable administrative burden in testing subscriber loops.

    Abstract translation: 公开了一种用于电话用户回路的测试系统，该测试系统部分地通过被称为对增益系统的多路复用设备导出。 在这种测试方案中，从对方增益系统的远程终端到用户的本地分接线与载波系统本身分离，并通过将它们连接到从中心局延伸到远程终端位置的单独的金属对进行测试。 同时，用户回路的载波导出部分连接到自动测试装置，该自动测试装置不仅通过多个自动测试来顺序地进行载波导频信道的传输特性，而且测试导出信道发送监控信息的能力 如铃声，硬币控制和派对识别信息。 配对增益通道的远程终端由反射或吸收端接选择性地终止，以协助这些测试程序。 测试系统的设计是为了使中心局测试人员看起来像载体导频通道，就像它们与金属环路一样，从而在测试用户环路方面节省了相当的管理负担。

    Testing of digital systems
    19.
    发明授权
    Testing of digital systems 失效
    数字系统测试

    公开(公告)号：US4046964A

    公开(公告)日：1977-09-06

    申请号：US699659

    申请日：1976-06-24

    Applicant: Thomas Henry Daugherty ,  Dale Eugene Stone

    Inventor： Thomas Henry Daugherty ,  Dale Eugene Stone

    IPC: H04Q11/04 ,  H04J3/14

    CPC classification number: H04M3/303 ,  H04Q11/04

    Abstract: A digital subscriber loop transmission system is disclosed through which a number of remote subscribers are serviced with a smaller number of time division channels.The digital transmission system includes an automatic channel testing unit which selects digital channels one at a time and in sequence for a series of automatic tests. Channels which fail these tests are withdrawn from service.One such test involves ringing and automatic number identification circuits by means of which subscribers' telephones are rung and the off-hook subscriber on a two-party line is identified, both by the use of supervisory codes in the digital pulse stream. These supervisory codes are used to test the supervisory circuits themselves and, incidentally, large portions of the overall system.

    Abstract translation: 公开了一种数字用户环路传输系统，通过该数字用户环路传输系统，用较少数量的时分信道为多个远程用户提供服务。

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