| 摘要 |
PURPOSE:To attain easily the test of a subscriber's equipment by executing a prescribed test operation according to a command inputted to a microprocessor or acting a telephone set as a test telephone set. CONSTITUTION:The microprocessor 27 is connected to a telephone input/output circuit 16, an LED drive circuit 18 and a channel connection circuit 31 via a signal bus 28 and connected to ports 19-22 via the signal bus 28 and interface circuits 23-26. In throwing a changeover switch 29 to the test position, a prescribed test operation is executed to a device to be tested according to the command inputted to the microprocessor 27 and according to the sequence prepared in advance in the microprocessor 27, or the device is acted like a test telephone set and the resuflt of test is displayed on an LED lamp.
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