| 摘要 |
In fiber telecommunications network where an optical fiber is extended to the subscriber's neighborhood, mechanized loop testing is performed by a test unit located in a network unit in the subscriber's neighborhood. The test unit is responsive to commands from a controller located in the network unit to perform metallic line tests on the lines extending to the subscriber. Test results are stored in a memory associated with the controller in the network unit. Upon receipt of a test request from a central test controller, the controller within the network unit determines if there is sufficient time to perform the test; if so, a new test is performed and the results are conveyed back to the central test controller controller. If sufficient time is not available, the results of the last performed routine test contained in the memory are transmitted back to the central test controller. The test results sent back to the central test controller are conveyed firstly in the form of a particular four-digit code, which code is interpreted at a remote terminal and converted to a specific resistive signature which is conveyed back to the central test controller. The specific resistive signature is interpreted by the standard remote measurement unit located in a remote terminal. |
