XVI. DSL Diagnostics

How to check detailed ADSL / VDSL line statistics

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Vigor 120
Vigor 130
Vigor 166
Vigor 2620Ln
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Keywords:
ADSL
VDSL
VDSL2
dsl
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DrayTek routers report line statistics which are summarised via the Diagnostics menu in the Web Interface or reported in detail via the command line interface (CLI). To check the detailed line statistics, a CLI session must be established via telnet or SSH. This page details how to access the router's Command Line Interface via web console or SSH: Accessing the router's Command Line Interface (CLI)

Basic Line Statistics

To show the more basic line statistics, enter "vdsl status" (or "adsl status" for an ADSL line)

It will show this output, details of each heading are listed below:

> vdsl status
---------------------- ATU-R Info (hw: annex A, f/w: annex A/B/C) -----------
Running Mode : 17A State : SHOWTIME
DS Actual Rate : 79995000 bps US Actual Rate : 19999000 bps
DS Attainable Rate : 97676176 bps US Attainable Rate : 28959000 bps
DS Path Mode : Fast US Path Mode : Fast
DS Interleave Depth : 1 US Interleave Depth : 1
NE Current Attenuation : 8 dB Cur SNR Margin : 10 dB
DS actual PSD : -5.-6 dB US actual PSD : 13. 1 dB
NE CRC Count : 0 FE CRC Count : 895
NE ES Count : 0 FE ES Count : 496
Xdsl Reset Times : 0 Xdsl Link Times : 1
ITU Version[0] : b5004946 ITU Version[1] : 544e0000
VDSL Firmware Version : 05-06-07-05-01-07 [with Vectoring support]
Power Management Mode : DSL_G997_PMS_L0
Test Mode : DISABLE
-------------------------------- ATU-C Info ---------------------------------
Far Current Attenuation : 0 dB Far SNR Margin : 15 dB
CO ITU Version[0] : b5004244 CO ITU Version[1] : 434da44f
DSLAM CHIPSET VENDOR : < BDCM >
>
Running Mode: The xDSL mode being used, i.e. ADSL, ADSL2+ or VDSL: 8a, 17a, 30a Status: SHOWTIME indicates that the line is in synch.
DS Actual Rate: The downstream sync rate in bits per second, limited by ISP's line profile US Actual Rate: The upstream sync rate in bits per second, limited by ISP's line profile
DS Attainable Rate: The maximum physical rate achievable US Attainable Rate: The maximum physical rate achievable
DS Path Mode: Interleave or Fast path US Path Mode: Interleave or Fast path
DS Interleave Depth: Shows the Interleave depth if line is using Interleaving US Interleave Depth: Shows the Upstream Interleave depth if line is using Interleaving
NE Current Attenuation: Line / Loop attenuation of the router Cur SNR Margin: Downstream SNR (Signal to Noise Ratio) value in dB
DS actual PSD: Downstream Power Spectrum Density US actual PSD: Upstream Power Spectrum Density
NE CRC Count: Downstream Cyclic Redundancy Check fail count FE CRC Count: Upstream Cyclic Redundancy Check fail count
NE ES Count: Downstream Errored Seconds count FE ES Count: Upstream Errored Seconds count
Xdsl Reset Times: Number of times that the DSL interface has reset since last power cycle Xdsl Link Times: Number of times that the DSL interface has reconnected since last power cycle
ITU Version[0]: Vendor code of the router ITU Version[1]: Vendor code of the router (continued)
VDSL Firmware Version: The router's modem code  
Power Management Mode: Power management type used  
Far Current Attenuation: Upstream Line / Loop attenuation Far SNR Margin: Upstream SNR (Signal to Noise Ratio) value in dB
CO ITU Version[0]: Vendor code of the exchange / cabinet equipment CO ITU Version[1]: Vendor code of the exchange / cabinet equipment (continued)
DSLAM CHIPSET VENDOR: Vendor of the exchange / cabinet equipment  


Detailed Line Statistics

To show more detailed line statistics, enter "vdsl status more" (or "adsl status more" for an ADSL line)

This will show details of the line statistics in this format.

Near End - The local end, in this case the router / modem. This is the Downstream information.

Far End - The remote end, which is the cabinet or exchange's hardware. This is the Upstream information.

Details of each statistic are listed below:

> vdsl status more
---------------------- ATU-R Info (hw: annex A, f/w: annex A/B/C) -----------
Near End Far End Note
Trellis : 1 1
Bitswap : 1 1
ReTxEnable : 1 1
VirtualNoise : 0 0
20BitSupport : 0 0
LatencyPath : 0 0
LOS : 0 0
LOF : 0 0
LPR : 0 0
LOM : 0 0
SosSuccess : 0 0
NCD : 0 0
LCD : 0 0
FECS : 0 2575 (seconds)
ES : 35 3 (seconds)
SES : 3 1 (seconds)
LOSS : 0 0 (seconds)
UAS : 27 1861 (seconds)
HECError : 0 0
CRC : 126 31
RsCorrection : 0 0
INP : 230 160 (symbols)
InterleaveDelay : 0 62 (1/100 ms)
NFEC : 32 32
RFEC : 16 16
LSYMB : 16 16
INTLVBLOCK : 32 32
AELEM : 0 ----
Trellis Indicates whether Trellis coding is in use
Bitswap Indicates whether Bit Swapping is in use (1=Enabled, 0=Disabled)
ReTxEnable Indicates whether G.998.4 / G.INP is enabled:    see this guide (1=Enabled, 0=Disabled)
VirtualNoise Indicates whether Virtual Noise is in use
20BitSupport Indicates whether 20 Bit support is in use (1=Enabled, 0=Disabled)
LatencyPath If ActualInterleaveDelay > 100 then interleave path, else it is fast path
LOS Loss Of Signal count
LOF Loss Of Frame count
LPR Loss Of Power count
LOM Loss Of Margin count
SosSuccess Successful SOS procedure count during the accumulation period
NCD No Cell Delineation failure count
LCD Loss Of Cell Delineation failure count
FECS Forward Error Correction Seconds - Line far-end (FECS-LFE)
ES Errored Seconds - Line far-end (ES-LFE)
SES Severely Errored Seconds - Line far-end (SES-LFE)
LOSS Loss Of Signal Seconds
UAS Un-Available Seconds - Line (UAS-L) & Unavailable Seconds - Line far-end (UAS-LFE)
HECError Header Error Check Error count, HEC anomalies in the ATM Data Path
CRC Cyclic Redundancy Check error count, number of CRC 8 anomalies (number of incorrect CRC)
RsCorrection Not used
INP Impulse Noise Protection value.
The the value reported is the number of
DMT symbols that can be error corrected for.
InterleaveDelay

The actual one-way interleaving delay introduced interleaving. Value is in increments of 1/100ms i.e. 62 = 0.62ms

NFEC This parameter reports the actual Reed-Solomon codeword size in bytes used in the latency path in which the bearer channel is transported.
RFEC Actual number of Reed-Solomon redundancy bytes (RFEC).
This parameter reports the actual number of Reed-Solomon redundancy bytes per codeword used in the latency path in which the bearer channel is transported. The value 0 indicates no Reed-Solomon coding.
G.992.1/2:
Number of Reed-Solomon bytes. The value corresponds to RF/S for the
fast path, RI/S for the interleaved path (number of RS bytes per symbol).
G.992.3/4/5:
The value corresponds to RP (number of RS bytes per FEC data frame).
G.993.1:
The value corresponds to R (number of RS check bytes per code word).
G.993.2:
The number of redundancy octets in the RS codeword.
LSYMB This parameter reports the actual number of bits per symbol assigned to the latency path in which the bearer channel is transported. This value does not include trellis overhead. It ranges from 0 to 65535. Maximum possible value is 3825 in case of ADSL2 and 7665 in case of ADSL2+.
This parameter is not valid for G.993.1.
INTLVBLOCK This parameter reports the actual block length of the interleaver used in the latency path in which the bearer channel is transported.
The value ranges from 4 to 255 by step of 1.
AELEM Upstream Power Back-Off (UPBO) related status parameters for the alternative electrical length estimation method (AELEM).

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