Viewing Performance and ATM Statistics 1913 Select the option corresponding to the type of performance monitoring (PM) datayou want to view: section, line, far line, path, or far path.4 Select the option corresponding to the type of data you want to display (current,interval, or total). The OC3/STM-1 Performance Monitoring screen displays thecurrent, interval, or total data for the type of statistic you selected in step 2b.The following subsections list the statistics displayed for each of these types ofperformance monitoring.OC3/STM-1 Section Performance Statistics The OC3/STM-1 SectionPerformance Monitoring screen displays the following statistics:ES — The number of errored seconds (ESs) encountered by the OC3/STM-1sectionSES — The number of severely-errored seconds (SESs) encountered by theOC3/STM-1 sectionSEFS — The number of severely errored framing seconds (SEFSs) encountered bythe OC3/STM-1 sectionCVS — The number of coding violations (CVs) encountered by the OC3/STM-1sectionLOS — The number of Loss of Signal (LOS) conditions encountered by theOC3/STM-1 sectionLOF — The number of Loss of Frame (LOF) conditions encountered by theOC3/STM-1 sectionOC3/STM-1 Line Performance Statistics The OC3/STM-1 Line PerformanceMonitoring screen displays the following statistics:ES — The number of errored seconds (ESs) encountered by the OC3/STM-1 lineSES — The number of severely-errored seconds (SESs) encountered by theOC3/STM-1 lineUAS — The number of unavailable seconds (UASs) encountered by theOC3/STM-1 lineCVS — The number of coding violations (CVs) encountered by the OC3/STM-1lineAIS — Indicates whether or not an Alarm Indicator Signal (AIS) condition has beenencountered by the OC3/STM-1 lineRDI — Indicates whether or not a Remote Defect Indication (RDI) condition hasbeen encountered by the OC3/STM-1 interface. Also known as FERF (Far EndReceive Failure). This is the alarm that is generated when a far end AIS or LOPdefect is detectedOC3/STM-1 Far Line Performance Statistics The OC3/STM-1 Far LinePerformance Monitoring screen displays the following statistics:ES — The number of far end errored seconds (ESs) encountered by theOC3/STM-1 interfaceSES — The number of far end severely-errored seconds (SESs) encountered by theOC3/STM-1 interface
