ZyXEL VES1724-56B2 User Guide - Page 59

Status: VDSL Port Details continued

Page 59 highlights

Chapter 7 System Status and Port Statistics Table 7 Status: VDSL Port Details (continued) LABEL DESCRIPTION Line Attenuation This field displays the upstream/downstream line attenuation the Switch detects according to the line length, frequency and the line wire diameter. Transmit Power Trellis Snr Mode Last State Line attenuation increases with line length and frequency. Bigger wires reduce attenuation. This field displays the upstream/downstream transmission power of the line. It ranges from 0 to 25.5 dBm, with 0.1 dB steps for downstream. It ranges from 0 to 25.5 dBm, with 0.1 dB steps for upstream. This field displays whether trellis coding is used in the upstream/downstream transmission. This field displays whether the upstream/downstream transmitter referred virtual noise is enabled or disabled. This field displays the last successful transmitted initialization state for upstream and downstream directions through the line. The possible states are as shown next. Current State vtucG9941, vtucQuiet1, vtucChDiscov1, vtucSynchro1, vtucPilot1, vtucQuiet2, vtucPeriodic1, vtucSynchro2, vtucChDiscov2, vtucSynchro3, vtucTraining1, vtucSynchro4, vtucPilot2, vtucTeq, vtucEct, vtucPilot3, vtucPeriodic2, vtucTraining2, vtucSynchro5, vtucMedley, vtucSynchro6, vtucShowtime, vturG9941, vturQuiet1, vturChDiscov1, vturSynchro1, vturLineprobe, vturPeriodic1, vturSynchro2, vturChDiscov2, vturSynchro3, vturQuiet2, vturTraining1, vturSynchro4, vturTeq, vturQuiet3, vturEct, vturPeriodic2, vturTraining2, vturSynchro5, vturMedley, vturSynchro6, vturShowtime. This field displays any existing upstream/downstream failure for the line. NoDefect: No failure was detected. LossOfFraming: A loss of frame synchronization was detected. LossOfSignal: A loss of signal was detected. LossOfPower: A loss of power was detected. Actual net data rate Prev net data rate Actual Delay Actual INP Receive Power INP Report Codeword Size RFEC LSYMB InitFailure: The most recent initialization failed. This field displays the actual upstream/downstream data transmission rate. This field displays the previous upstream/downstream data transmission rate just before the rate changed. This field displays the actual upstream/downstream interleave delay (in milliseconds) used on the line. This field displays the actual impulse noise protection (INP). This field displays the upstream/downstream receiving power of the line. The range is from 0 to 25.5 dBm with 0.1 dB steps for both downstream and upstream traffic. This field displays the method used to compute the actual INP above. Formula displays if the value is computed according to an INP_no_erasure formula defined in the ITU-T G.993.2 standard. This field displays the actual size of Reed-Solomon codeword used in this line. ReedSolomon (RS) Code is an error-correction code. RFEC refers to Redundancy Forward Error Correction. This field displays the actual number of Reed-Solomon redundancy bytes. The Reed-Solomon code has the capability to correct errors by adding redundancy bytes. The longer the Reed-Solomon redundancy bytes the higher the error correction capability. LSYMB refers to Latency SYMbol Bit. This field displays the actual number of bits per symbol. VES1724-56 User's Guide 59

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Chapter 7 System Status and Port Statistics
VES1724-56 User’s Guide
59
Line Attenuation
This field displays the upstream/downstream line attenuation the Switch detects
according to the line length, frequency and the line wire diameter.
Line attenuation increases with line length and frequency. Bigger wires reduce
attenuation.
Transmit Power
This field displays the upstream/downstream transmission power of the line. It ranges
from 0 to 25.5 dBm, with 0.1 dB steps for downstream. It ranges from 0 to 25.5 dBm,
with 0.1 dB steps for upstream.
Trellis
This field displays whether trellis coding is used in the upstream/downstream
transmission.
Snr Mode
This field displays whether the upstream/downstream transmitter referred virtual noise
is enabled or disabled.
Last State
This field displays the last successful transmitted initialization state for upstream and
downstream directions through the line. The possible states are as shown next.
vtucG9941, vtucQuiet1, vtucChDiscov1, vtucSynchro1, vtucPilot1, vtucQuiet2,
vtucPeriodic1, vtucSynchro2, vtucChDiscov2, vtucSynchro3, vtucTraining1,
vtucSynchro4, vtucPilot2, vtucTeq, vtucEct, vtucPilot3, vtucPeriodic2,
vtucTraining2, vtucSynchro5, vtucMedley, vtucSynchro6, vtucShowtime,
vturG9941, vturQuiet1, vturChDiscov1, vturSynchro1, vturLineprobe,
vturPeriodic1, vturSynchro2, vturChDiscov2, vturSynchro3, vturQuiet2,
vturTraining1, vturSynchro4, vturTeq, vturQuiet3, vturEct, vturPeriodic2,
vturTraining2, vturSynchro5, vturMedley, vturSynchro6, vturShowtime.
Current State
This field displays any existing upstream/downstream failure for the line.
NoDefect
: No failure was detected.
LossOfFraming
: A loss of frame synchronization was detected.
LossOfSignal
: A loss of signal was detected.
LossOfPower
: A loss of power was detected.
InitFailure
: The most recent initialization failed.
Actual net data
rate
This field displays the actual upstream/downstream data transmission rate.
Prev net data
rate
This field displays the previous upstream/downstream data transmission rate just before
the rate changed.
Actual Delay
This field displays the actual upstream/downstream interleave delay (in milliseconds)
used on the line.
Actual INP
This field displays the actual impulse noise protection (INP).
Receive Power
This field displays the upstream/downstream receiving power of the line. The range is
from 0 to 25.5 dBm with 0.1 dB steps for both downstream and upstream traffic.
INP Report
This field displays the method used to compute the actual INP above.
Formula
displays
if the value is computed according to an INP_no_erasure formula defined in the ITU-T
G.993.2 standard.
Codeword Size
This field displays the actual size of Reed-Solomon codeword used in this line. Reed-
Solomon (RS) Code is an error-correction code.
RFEC
RFEC refers to Redundancy Forward Error Correction. This field displays the actual
number of Reed-Solomon redundancy bytes. The Reed-Solomon code has the capability
to correct errors by adding redundancy bytes. The longer the Reed-Solomon redundancy
bytes the higher the error correction capability.
LSYMB
LSYMB refers to Latency SYMbol Bit. This field displays the actual number of bits per
symbol.
Table 7
Status: VDSL Port Details (continued)
LABEL
DESCRIPTION