Draytek Vigor 130 and FTTC SNR setting increased sync

ChrisD. · 9 Oct 2017 at 11:17

Not sure if this will help anyone else, but I recently tried:

Code:

vdsl snr -50

And my downstream has gone from 55 mbit to near 70 mbit.

It's odd as with the normal BT modem it stays at 55. It's been stable like this for several weeks.

This may help any other 130 users with a long line. The cab is ECI, not sure if this makes a difference.

Code:

> vds sn
Usage:
vdsl snr [delta]
  delta: SNR margin delta. The SNR margin delta should range from -50 to 50.
  delta=1 means 0.1dB.
  Current VDSL SNR Margin is 3 dB.
  Current VDSL SNR Margin delta setting is -50.
> vds sn 0
VDSL SNR update successfully !
Restarting modem ...
>
> vdsl st
  ---------------------- ATU-R Info (hw: annex A, f/w: annex A/B/C) -----------
   Running Mode            :      17A       State                : SHOWTIME
   DS Actual Rate          : 54811000 bps   US Actual Rate       : 18663000 bps
   DS Attainable Rate      : 55041624 bps   US Attainable Rate   : 18739510 bps
   DS Path Mode            :        Fast    US Path Mode         :        Fast
   DS Interleave Depth     :        1       US Interleave Depth  :        1
   NE Current Attenuation  :       16 dB    Cur SNR Margin       :        6  dB
   DS actual PSD           :     6. 7 dB    US actual PSD        :     6. 9  dB
   NE CRC Count            :        0       FE CRC Count         :    23533
   NE ES Count             :        0       FE  ES Count         :    21091
   Xdsl Reset Times        :        0       Xdsl Link  Times     :        2
   ITU Version[0]          : b5004946       ITU Version[1]       : 544e0000
   VDSL Firmware Version   : 05-07-06-0D-01-07   [with Vectoring support]
   Power Management Mode   : DSL_G997_PMS_L0
   Test Mode               : DISABLE
  -------------------------------- ATU-C Info ---------------------------------
   Far Current Attenuation :       17 dB    Far SNR Margin       :        6  dB
   CO ITU Version[0]       : b5004946       CO ITU Version[1]    : 544eb206
   DSLAM CHIPSET VENDOR    : < IFTN >
> vds sn -50
VDSL SNR update successfully !
Restarting modem ...
>
> vd st
  ---------------------- ATU-R Info (hw: annex A, f/w: annex A/B/C) -----------
   Running Mode            :      17A       State                : SHOWTIME
   DS Actual Rate          : 67000000 bps   US Actual Rate       : 18744000 bps
   DS Attainable Rate      : 73047816 bps   US Attainable Rate   : 18823266 bps
   DS Path Mode            :        Fast    US Path Mode         :        Fast
   DS Interleave Depth     :        1       US Interleave Depth  :        1
   NE Current Attenuation  :       16 dB    Cur SNR Margin       :        1  dB
   DS actual PSD           :     6. 7 dB    US actual PSD        :     6. 9  dB
   NE CRC Count            :        0       FE CRC Count         :    23533
   NE ES Count             :        0       FE  ES Count         :    21091
   Xdsl Reset Times        :        0       Xdsl Link  Times     :        3
   ITU Version[0]          : b5004946       ITU Version[1]       : 544e0000
   VDSL Firmware Version   : 05-07-06-0D-01-07   [with Vectoring support]
   Power Management Mode   : DSL_G997_PMS_L0
   Test Mode               : DISABLE
  -------------------------------- ATU-C Info ---------------------------------
   Far Current Attenuation :       17 dB    Far SNR Margin       :        6  dB
   CO ITU Version[0]       : b5004946       CO ITU Version[1]    : 544eb206
   DSLAM CHIPSET VENDOR    : < IFTN >

ChrisD. · 15 Oct 2017 at 09:32

The cabinet is ECI, I did put this in my OP.

thewanted said:
Damn, that's a big improvement @ChrisD. Would you mind posting your attenuation stats since your previous attainable sync rates are almost identical to mine, please?

SNR is 3 db.

ChrisD. · 15 Oct 2017 at 12:13

It's all in the OP isn't it?

ChrisD. · 17 Oct 2017 at 08:28

Code:

> v s 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   :      0               0
 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         :   152087            242079 (seconds)
 ES           :    384            22377 (seconds)
 SES          :      0               0 (seconds)
 LOSS         :      0             110 (seconds)
 UAS          :     40            22377 (seconds)
 HECError     :      0               0
 CRC          :    495            24927
 RsCorrection :      0               0
 INP          :      0               0 (symbols)
 InterleaveDelay :      0               0 (1/100 ms)
 NFEC         :    255             255
 RFEC         :     16              16
 LSYMB        :   5026            17979
 INTLVBLOCK   :    255             255
 AELEM        :      0            ----

Mine.

ChrisD. · 8 Dec 2017 at 12:53

Unfortunately DLM can be a bit Nazi like, you're just going to have to wait. If it's sync'd at 67 dead on then it may have banded you. The only way to get it removed beyond waiting, is a DLM reset.

ChrisD. · 8 Dec 2017 at 13:59

bledd said:
How do you find out what type of cabinet you're connected to? I already get ~70Mbps, so I don't really see the need to fiddle right now.

If you have a Vigor 130 then vdsl stat will tell you. Google the vendor.

DSLAM CHIPSET VENDOR : < IFTN > is ECI.

ChrisD. · 11 Dec 2017 at 08:34

Any noise on the line when using a phone?

ChrisD. · 13 May 2018 at 15:44

Steve_bullockuk said:
Did the SNR tweak on my 130. The attainable rate has shot up but the actual rate has stayed the same. Bang on 60/20. Wondering if this is capped by PlusNet?

Looks like your line has been banded.

ChrisD. · 13 May 2018 at 18:20

andy_mk3 said:
Is there anything that can be done about this other than phoning the ISP?

It'll either remove itself which can take months or a DLM reset will remove it.

ChrisD. · 14 May 2018 at 15:01

[RB] said:
Has anyone moved from the HG612-3B to the 130 and seen any significant increase in line stats? I'm not having any issues at the moment and the router seems really stable so just curious more than anything.

I doubt it.

ChrisD. · 29 May 2018 at 18:58

Cuchulainn said:
Does this command need to be re-input in the event of a modem rebbot?

Not that I'm aware of.

For the purposes of an update, my modem is still sync'd at 67000, compared to the 50 something it was before. It appears I'm banded by Plusnet/DLM, but it's been rock solid since the OP.

ChrisD. · 27 Jun 2018 at 18:47

Annoyingly my SNR has gone to 4 and my line has dropped to 59Mbit from the 67Mbit. It looks banded (again) looking at the stats.

Code:

> v s
  ---------------------- ATU-R Info (hw: annex A, f/w: annex A/B/C) -----------
   Running Mode            :      17A       State                : SHOWTIME
   DS Actual Rate          : 59995000 bps   US Actual Rate       : 19234000 bps
   DS Attainable Rate      : 73559256 bps   US Attainable Rate   : 19317700 bps
   DS Path Mode            :        Fast    US Path Mode         :        Fast
   DS Interleave Depth     :        1       US Interleave Depth  :        1
   NE Current Attenuation  :       16 dB    Cur SNR Margin       :        4  dB
   DS actual PSD           :     6. 7 dB    US actual PSD        :     6. 9  dB
   NE CRC Count            :        0       FE CRC Count         :    78762
   NE ES Count             :        0       FE  ES Count         :    67898
   Xdsl Reset Times        :        0       Xdsl Link  Times     :        1
   ITU Version[0]          : b5004946       ITU Version[1]       : 544e0000
   VDSL Firmware Version   : 05-07-06-0D-01-07   [with Vectoring support]
   Power Management Mode   : DSL_G997_PMS_L0
   Test Mode               : DISABLE
  -------------------------------- ATU-C Info ---------------------------------
   Far Current Attenuation :       18 dB    Far SNR Margin       :        6  dB
   CO ITU Version[0]       : b5004946       CO ITU Version[1]    : 544eb206
   DSLAM CHIPSET VENDOR    : < IFTN >

ChrisD. · 29 Jun 2018 at 19:27

r7slayer said:
strange these stats shouldn't suggest a unstable line which would end up resulting in a banded line.

It's been rock solid for ages so I don't understand why it's dropped. I'm not sure if it's worth the effort of speaking to PlusNet about it as I'm certain a DLM reset will sort it, but whether I can convince them to arrange an engineer is another story.

ChrisD. · 29 Jun 2018 at 19:39

Jon20 said:
Are Plusnet able to do a remote DLM reset? Not sure what the criteria is though to have one done.

I believe it can only be done by Openreach sadly.

ChrisD. · 28 Dec 2018 at 09:30

Great news.

ChrisD. · 31 Dec 2018 at 11:32

l3ully said:
Ok thanks.

Read a couple of people’s comments on the Draytek forum stating that the BT firmwares don’t work well on the 130 if you are on an ECI cabinet and to use the alternative version.

Oh really? My sync has dropped to 59Mb and I'm using the BT firmware on an ECI cabinet.

ChrisD. · 31 Dec 2018 at 17:04

l3ully said:
Yeah, some have reported slower speeds and erratic line and disconnects.

What F/W do they suggest using?

ChrisD. · 31 Dec 2018 at 17:58

Of course you can, okay I know which you'll mean, I will give it a go. Thank you!

ChrisD. · 13 Aug 2019 at 22:04

Use the BT one.

ChrisD. · 15 Aug 2019 at 09:19

You can route through to it using pfSense, there's a few guides online.