ZyXEL VES1724-56B2 User Guide - Page 61

Chapter 7 System Status and Port Statistics Table 7 Status: VDSL Port Details (continued) LABEL DESCRIPTION Actual INP against REIN RS CW per DTU VDSL Band Status This field displays the actual impulse noise protection (INP) levels guaranteed on the latency path against REIN (Repetitive Electrical Impulse Noise) which is related to AC power frequency. This field displays the number of Reed-Solomon codewords per DTU (Data Transfer Unit). The fields in this section display the status for upstream bands 0, 1, 2, 3, 4 (U0, U1, U2, U3, U4) and downstream bands 1, 2, 3, 4 (D1, D2, D3, D4). SNR margin This field displays signal-to-noise ratio margin for each upstream and downstream bands. NA displays when the band is not used. Signal Attenuation This field displays the signal attenuation status for each upstream and downstream bands. NA displays when the band is not used. Line Attenuation This field displays the line attenuation status for each upstream and downstream bands. NA displays when the band is not used. Transmit Power This field displays the transmission power for each upstream and downstream bands. NA displays when the band is not used. Receive Power This field displays the receiving power for each upstream and downstream bands. NA displays when the band is not used. VDSL Performance This section displays current VDSL performance measured from the Switch (Vtuc) and CPE side (Vtur) for the following three measurement durations. • Since Link: This field displays the VDSL performance information recorded since the line was last up. • Curr 15 Min: This field displays the VDSL performance information recorded in the last 15 minutes. • Curr 1 Day: This field displays the VDSL performance information recorded in the past one day. Full Inits This field displays how many full initialization attempts on the line (successful and failed) there were. Failed Full Inits This field displays the number of failed full initialization attempts on the line. FECS This field displays the number of seconds at least one FEC (Forward Error Correction) event occurred on this line. ES This field displays the number of seconds the following events occurred on this line: SES • The Switch: CRC-8, LOS, SEF or LPR value greater than or equal to 1 on the line. • CPE side: FEBE, LOS-FE, RDI or LPR-FE value greater than or equal to 1 on the line. This field displays the number of seconds during this interval that: LOSs LOFs UAS Code Violation Corrected • The Switch: LOS, SEF or LPR value was greater than or equal to 1 or the number of CRC-8 anomalies greater than or equal to 18 times on the line. • CPE side: LOS-FE, RDI or LPR-FE value was greater than or equal to 1 or the number of FEBE anomalies greater than or equal to 18 times on the line. This field displays the count of 1-second intervals containing one or more Loss of Signal (LOS) failures. This field displays the count of 1-second intervals containing one or more Loss of Framing (LOF) failures. This field displays the count of 1-second intervals for which the line is unavailable. Use this to define this line tolerance to allow how long for a period of Unavailable Seconds (UAS). Refer to ITU-T G997.1 chapter 7.2.1.1.5 for more detailed information. This field displays the number of code words containing one or more anomalies. This field displays the number of code words containing one or more error blocks that have been corrected. VES1724-56 User's Guide 61