| 摘要 |
<p>PROBLEM TO BE SOLVED: To confirm the normality of a line part without imposing any load on an operating system packet changeover switch part of a dual packet switch. SOLUTION: This device is provided with a circuit part 1 connected between a transmission path and operating system and preliminary system packet changeover switch parts (SW0) 2 and (SW1) 3 and a CPU part 4 or 5 for interrupting the output from the line part 1 to the operating system packet changeover switch part (SW0) 2 in diagnosing.</p> |
