XVI. DSL Diagnostics
ExpiredHow to check detailed ADSL / VDSL line statistics
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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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- First Published: 20/05/2015
- Last Updated: 22/04/2021