| 摘要 |
<p>PURPOSE:To easily execute the correspondence of the hourly relation of trace information by timing a timer value from a prescribed initial value at the time of receiving a timer synchronization particular pattern sent from the other station. CONSTITUTION:A communication control part 3 activates a timer synchronization particular pattern generating circuit 7 through a signal line 23 and sends a timer synchronization particular pattern through signal lines 22 and 26 to an external part. On the other hand, when the timer synchronization particular pattern is received from the external part by a signal line 10, a particular pattern is detected through a signal line 11 by a timer synchronization particular pattern detecting circuit 5, and the timer synchronization particular pattern detecting circuit 5 causes a timer 6 to execute a timing from the prescribed initial value through a signal line 16. Thus, the counted value of the timer 6 can be synchronized in all stations on a transmission line, and the correspondence of the trace information to be gathered at each station can be facilitated.</p> |
