초록 ▼

A method and apparatus are described for testing a telecommunication line despite a gap in a metallic line between the testing system at a central office and the subscriber\s line. On the subscriber\s or remote end of the gap in the metallic line, apparatus is provided for performing certain desired

A method and apparatus are described for testing a telecommunication line despite a gap in a metallic line between the testing system at a central office and the subscriber\s line. On the subscriber\s or remote end of the gap in the metallic line, apparatus is provided for performing certain desired tests on the continuous metallic portion of the subscriber\s line. This apparatus is connected to a testing system on the central office or local side of the gap with suitable communication equipment so that tests performed on the remote end may be reported back to the testing system. The remote end testing apparatus is similar to apparatus described in application Ser. No. 645,479. The testing system at the central office preferably is a conventional system, such as the MLT system which already is installed in many central offices throughout the United States, together with the necessary modifications to communicate with and control the remote end testing apparatus. The necessary modifications can be implemented in software by modifying the computer programs that run the MLT system. Alternatively, the necessary modifications are implemented in hardware by providing at the local end apparatus that can simulate certain operating parameters of the subscriber\s line and by providing communication between the remote end testing apparatus and the simulation equipment.

대표청구항 ▼

In a telecommunication system comprising a communication line, a local interface connecting the communication line to a central office and a remote interface connecting the communication line to at least one continuous metallic subscriber line, there being no continuous metallic path from the subscr

In a telecommunication system comprising a communication line, a local interface connecting the communication line to a central office and a remote interface connecting the communication line to at least one continuous metallic subscriber line, there being no continuous metallic path from the subscriber line to the central office, and means connected to the central office side of the local interface for testing the subscriber line, apparatus for testing said subscriber line comprising: means at the remote interface for measuring at least one of subscriber line resistance, DC current and DC voltage, said means being connected by continuous metallic leads to said subscriber line; means at the remote interface for applying to the subscriber line at least one AC signal to measure AC characteristics of the subscriber line; means at the local interface for simulating at least one of the subscriber line resistance, DC current and DC voltage and AC characteristics that are measured at the remote interface; means at the remote interface for transmitting to the simulating means measurements made by the measuring means and signals representative of said AC characteristics of the subscriber line; and means at the local interface for connecting said simulating means to said testing means, whereby said testing means measures circuit parameters generated by said simulating means that simulate measurements made on the subscriber line by the means located at the remote interface.