Explanations for several parameters about error code statistics of MA5100's ADSL ports on NMS
1. Unavailable seconds (UAS): The UAS records the seconds when the port is not in the activating status. For the port which is being activated, ATUR-UAS increases. When the port is in activating and deactivating period, the statistics of unavailable seconds do not increase. Only the H513ADLE/G board supports the collection of UAS data.
2. Error Code Seconds (ES): If in a second, one or more CRC-8 errors, or one or more LOS/SEF/LPR alarms are received, this second is defined as ES.
3. Severely Errored Seconds (SES): If in a second, more than 18 CRC-8 errors are received, this second is defined as SES.
4. Fast Retrain Times: Refer to changing the line parameters (retrain) to adapt to the change of transmission line characteristics. MA5100 does not support the statistics of fast retrain times.
If a port's ES or SES ratio is high, that is, many ESs or even SESs are recorded during the activation period of the port, the line quality is poor. This causes too many CRC-8 check errors when data is transmitted. But we can not identify which part of the line is of poor quality. For the problem related to the line, you should ask the office to test the line segment-by-segment from the office-->cabling rack-->splice box-->junction box-->separator-->terminal. A modem can be used to perform segment-by-segment activation test to locate the fault point.