ring error monitor(REM)

A function that collects ring error data from ring stations. The ring error monitor may log the received errors, or analyze this data and record statistics on the errors.; 收集环形网络站环形差错数据的一种操作程序。环形网络差错监控程序可记录收到的差 错，或分析这类数据并记录差错的统计值。