ZyXEL VES1724-56 User Guide - Page 63
RS CW per DTU
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Chapter 7 System Status and Port Statistics Table 7 Status: VDSL Port Details (continued) LABEL DESCRIPTION G.INP Framing This field displays the DTU (Data Transfer Unit) framing type used when G.INP is Type enabled. 0: G.INP is disabled on the Switch. 1: The DTU doesn't contain an 8-bit CRC. 2: There is an additional 8-bit CRC inserted at the end of the DTU. 3: An 8-bit CRC is inserted as the first octet of the DTU. Actual INP against REIN RS CW per DTU VDSL Band Status 4: An 8-bit CRC is inserted as the first byte of the DTU. 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 (U0, U1, U2, U3) and downstream bands 1, 2, 3 (D1, D2, D3). 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 • 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. VES1724-56 User's Guide 63
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