| 摘要 |
<p>PURPOSE:To enable a person in charge of maintenance to recognize trouble by providing a trouble display function to a busy-lamp control part which turns on and off a busy lamp according to whether a CH unit is engaged or not, and turning on the busy lamp for a trouble display when trouble information is sent. CONSTITUTION:The LED control part 2-1 when inputting the trouble information sends an alternating signal of '1' and '0' to an LED (busy lamp) 1 to blink it and a signal which is sent to a blocking process part 51 and indicates trouble is inputted to the LED control part 2-1. Consequently, the busy lamp (LED) 1 of each CH unit blink in the case of transmission trouble, a step out, trouble in opposite-side multiplexing part mounting, and trouble in this-station-side multiplexing part nonmounting and the busy lamp (LED) 1 of a CH unit corresponding to the station device side blink in the case of trouble in subscriber- device side CH unit nonmounting.</p> |
