Lost 20 Mbps [VDSL]

Found out I had slower speeds yesterday and checked my modem to see it is connected at 61160 (I used to be on 79428). I've rebooted this morning but it resynced at 61694

Does anything in the status output I collected last night suggest an issue?

> vdsl status

---------------------- ATU-R Info (hw: annex A, f/w: annex A/B/C) -----------
Running Mode : 17A State : SHOWTIME
DS Actual Rate : 61160000 bps US Actual Rate : 20000000 bps
DS Attainable Rate : 61586088 bps US Attainable Rate : 24053656 bps
DS Path Mode : Fast US Path Mode : Fast
DS Interleave Depth : 1 US Interleave Depth : 1
NE Current Attenuation : 10 dB Cur SNR Margin : 6 dB
DS actual PSD : -3.-9 dB US actual PSD : -3.-8 dB
NE CRC Count : 3 FE CRC Count : 6315
NE ES Count : 2 FE ES Count : 6062
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 : 9 dB Far SNR Margin : 6 dB
CO ITU Version[0] : b5004946 CO ITU Version[1] : 544eb206
DSLAM CHIPSET VENDOR : < IFTN >
> vdsl status counts

[ Counters: Showtime ]
Near End Far End Note
ElapsedTime : 13386006 13386006 (seconds)
CRC : 2 6315
FEC : 139 79969
HEC : 0 0
CRC_P : 0 0
CRCP_P : 0 0
CVP_P : 0 0
NCD : 0 0
LCD : 0 0
ES : 1 6062
SES : 0 0
LOSS : 2 12
UAS : 0 0
LOFS : 0 0
[ Counters: 15Min ]
Near End Far End Note
ElapsedTime : 635 635 (seconds)
CRC : 0 1
FEC : 0 6
HEC : 0 0
CRC_P : 0 0
CRCP_P : 0 0
CVP_P : 0 0
NCD : 0 0
LCD : 0 0
ES : 0 1
SES : 0 0
LOSS : 0 0
UAS : 0 0
LOFS : 0 0
[ Counters: 1DAY ]
Near End Far End Note
ElapsedTime : 49235 49235 (seconds)
CRC : 2 30
FEC : 41 213
HEC : 0 0
CRC_P : -4596 0
CRCP_P : 0 0
CVP_P : 0 0
NCD : 0 0
LCD : 0 0
ES : 1 29
SES : 0 0
LOSS : 0 0
UAS : 0 0
LOFS : 0 0

From thos basic stats there may be nothing you can do except find te noise source.

10dB attenuation suggests you are 250m or there abouts from te cabinet. 10dB would equate to 80-90 Mbps attainable of a good clean line with 6dB SNR.

Your SNR is at 6dB suggesting there is a lot of noise especially when seeing teh number of errors.

Are you able to run DSL stats? and get the graphs

Interesting. I can't monitor a Vigor 130 modem with routerstats to get graphs, I don't believe its compatible. I did find another web console command for more statistics if they show anything relevant.

---------------------- ATU-R Info (hw: annex A, f/w: annex A/B/C) -----------
Near End Far End Note
Trellis : 1 1
Bitswap : 0 0
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 : 12 79989 (seconds)
ES : 1 6065 (seconds)
SES : 0 0 (seconds)
LOSS : 0 18 (seconds)
UAS : 33 333 (seconds)
HECError : 0 0
CRC : 1 6318
RsCorrection : 0 0
INP : 0 0 (symbols)
InterleaveDelay : 0 0 (1/100 ms)
NFEC : 255 255
RFEC : 16 16
LSYMB : 5410 16533
INTLVBLOCK : 255 255
AELEM : 0 ----
>

I haven't added any new equipment recently in the house, I can try unplugging all the equipment near the modem and attempt another resync later.

Is there a threshold it should drop to before I should involve my ISP if I'm unable to diagnose?

Edited by Aaron_01 (Sat 30-Mar-19 12:10:32)

In reply to a post by Aaron_01:

Is there a threshold it should drop to before I should involve my ISP if I'm unable to diagnose?

Yes, the estimates (or even minimum guaranteed line speed) quoted by your ISP when you joined/renewed your contract with them.

A 20Mb drop due to a neighbouring line having FTTC broadband activated is just 1 possible reason.

The stats only show the lines current state, and don't give any indication of what caused the drop in sync speed.
The stats show the line is performing as good as it can under the current conditions.

Ok I will contact them as it's dropped below 72.29Mbps for my phone number at the Zen checker. I did ask to be changed to their new £38.99 pricing 3 weeks ago and they did that putting me into another 12 month contract, with the speed being the same as I've had for the last 3 years. So could that have affected anything like re-training being activated?

I will have to put the supplied router back on for Zen to do diagnostics, so may do that during the coming week, it only syncs at 71Mbps because it doesn't have the right chipset for an ECI cabinet.

Superfast broadband is available in your location
Typical Download Speed
73.93Mbps
Maximum Download Speed
80Mbps
Minimum Download Speed:
72.29Mbps
Typical Upload Speed:
19Mbps

Edited by Aaron_01 (Sat 30-Mar-19 14:12:27)

In reply to a post by MHC:

10dB attenuation suggests you are 250m or there abouts from te cabinet. 10dB would equate to 80-90 Mbps attainable of a good clean line with 6dB SNR.

Make no difference as mine is 11.5dB attenuation and I am within 250m away from the cabinet and now got SNR sit at 6.0dB with 79999K with max rate sitting at 85446K

What is the point of your post?

It adds nothing to the discussion.

In reply to a post by j0hn83:

A 20Mb drop due to a neighbouring line having FTTC broadband activated is just 1 possible reason.

Now that I think about it, new neighbours moved in next door two weeks ago, they're a young couple so they must have applied for a fibre connection. I live in a maisonette (it's a single house split into 4 living flats)

Is this a fixable thing if so?

Edited by Aaron_01 (Sun 31-Mar-19 11:58:02)

Fixable yes, in an acceptable way, NO.

Tell them what your problem is and ask them to turn their modem off and disconnect it. Then see if yours recovers, if it does, you know the reason, however, crosstalk is a problem you will have to live with.

My neighbours have caused me to lose around 15+ Mbps and I know one who is the casue of around 9 - but there is nothing that can be done, you need to live with the laws of phyisics

hmm, I will have to introduce myself to them first.

I read that vectoring resolves these issues. Eastbourne got listed for the G.Fast upgrade in the November 2018 update, but I don't know if my cabinet has this?

BT Wholesale checker results: https://imgur.com/a/Eo3ikJm