Subscriber's line testing apparatus
 A testing apparatus for testing subscriber's lines of a communication system having a communication control unit with a plurality of subscriber's circuits for processing analog signals, which enter from the subscriber's lines, and a digital signal from the digital transmission line. The testing apparatus includes an information input unit for entering identifying information for specifying a subscriber's circuit in correspondence with each subscriber's line, and test-path specifying information. Each subscriber's circuit has a coder/decoder and a test path generator for establishing a test path on the side of a communication control unit on the basis of the test-path specifying information. The testing apparatus further has a communication unit for sending test-path specifying information to the specified subscriber's circuit, a connecting unit for connecting a testing unit for applying a test signal to the apparatus, and a test-path forming unit for forming a test path on the side of the testing apparatus. A test signal from the testing unit is inputted to the test path of the specified subscriber's circuit and an answer signal, which arrives via the test path, is inputted to the testing unit. 
Fujitsu Limited
H H
H04M H04M
inventional inventional
Yasuo
Suzuki