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[yorksfttc]

Hi all,

First time posting, so hope I'm sending the right information.

I have a 80 / 20 FTTC service.

I'm getting around 66Mbps download but only around 8Mbps Upload.

Considering I have such a good download speed, the Upload speed seems unusually slow.

I'm on EE broadband, but it's served by Openreach...and the BT wholesale checker says I should be capable of between 12Mbps - 20Mbs Upload.

I'm using a Vigor 130 modem and the Firmware is the Latest 3.8.4.1_BT firmware.

I've attached the BT_Wholesale Results and my VDSL stats for the modem.

I know this isn't an exact science but if anyone could suggest a reason why my upload speed is a lot slower than what the Wholesale results suggest it should be that would be great.

Many thanks in advance

[burakkucat]

Welcome to the kitz forum. 

I have a 80 / 20 FTTC service.

I'm getting around 66Mbps download but only around 8Mbps Upload.

Considering I have such a good download speed, the Upload speed seems unusually slow.

Yes, the 80/20 Mbps Openreach product giving you a throughput of 66/8 Mbps is somewhat odd.

I've looked at the attachments you have provided and nothing immediate "jumps out at me". But, as I am always confused with the Draytek way of reporting circuit statistics, I might have missed something.

...and the BT wholesale checker says I should be capable of between 12Mbps - 20Mbs Upload.

Taking the lower ends of the estimate for an impacted line I would expect to see somewhat greater than 48/13 Mbps.

The Vigor 130 does disclose that your circuit is connected to a Huawei DSLAM but I can't see that being responsible.

Perhaps other members will comment? 

[Alex Atkin UK]

Clear as mud, I still can't tell which are up or down.  Either way the fact one direction has 10dB margin suggests something is amiss to me.

Just wish it was clearer which direction its referring to, would make sense for it to be upstream considering the low speed but the attainable rate would suggest its downstream that has spare capacity. 

[meritez]

@yorksfttc,

Welcome, my initial suspicion is the vectoring enabled BT firmware is screwing up the upstream sync.

Would you be willing to try alternative modem firmware from Draytek's website?

[j0hn]

Your Downstream is already capped/banded by the DLM at 67Mb.
If it wasn't you would get the full 80Mb.

The upstream isn't capped by DLM and is syncing as high as it can under current conditions.

80/8 isn't right and something is impacting the upstream.

I'd usually recommend trying another modem but given you are already banded I would recommend resyncing as little as is possible.

Banding is almost always applied because of too many resyncs in a short time period, particularly on Huawei cabinets.
A few on the ECI G.INP trial have been hit with banding for high ES but that isn't the norm.

[mrk26]

I may be wrong but I think your cabinet don't like vigor modem, if you will have something with Broadcom chipset that may solve your issue. Only reason I say that is looking on your stats g.inp is off and modem may cause this issue.

[j0hn]

Only reason I say that is looking on your stats g.inp is off and modem may cause this issue.

Retx enable (G.INP) is 0 near end, 1 far end.
That means off for upstream and on for downstream on the Draytek.

[mofa2020]

Retx enable (G.INP) is 0 near end, 1 far end.
That means off for upstream and on for downstream on the Draytek.

No, unfortunately it means that G.INP is disabled for downstream and enabled for upstream.. that is from Draytek UK (unless they reversed the terms recently) website:

https://www.draytek.co.uk/support/guides/kb-dsl-status-more  (around the middle of the page)

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            ----

[tiffy]

No, unfortunately it means that G.INP is disabled for downstream and enabled for upstream.. that is from Draytek UK (unless they reversed the terms recently) website:

Unless I'm getting in a muddle j0hn is correct, (he's not often wrong) ie, DS re-tx enabled and US re-tx not?

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.

From the Draytek link provided this clearly states that near end is US and far end is DS, see attachment snapshot.

[mofa2020]

  

[mrk26]

I will just copy from Draytek website as @mofa2020 :

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.

@mofa2020 is correct.

[Alex Atkin UK]

Its problematic as it seems there is no standard for which is which as reported on a modem, as discussed on this old TBB post.  This is presumably why sensible vendors label them as upstream and downstream to avoid any ambiguity.

[burakkucat]

Draytek do not help anyone and seem to excel in muddles! 

Notice that they also use the very precise terms xTU-C and xTU-R (where x can be either A, for ADSL, or V, for VDSL) which refer to the exchange or cabinet based DSLAM/MSAN and the end-user's modem (or modem/router), respectively.

[Alex Atkin UK]

Draytek do not help anyone and seem to excel in muddles! 

Notice that they also use the very precise terms xTU-C and xTU-R (where x can be either A, for ADSL, or V, for VDSL) which refer to the exchange or cabinet based DSLAM/MSAN and the end-user's modem (or modem/router), respectively.

I did notice that but was none the wiser as obviously both ends of the link know the stats as they communicate with each other, so not sure how that makes any difference in determining which direction is which.

I mean I get the principle that the DSLAM is responsible for downstream management and your modem is responsible for upsteam, but still how does that work in understand which is which on the stats?

[j0hn]

No, unfortunately it means that G.INP is disabled for downstream and enabled for upstream.. that is from Draytek UK (unless they reversed the terms recently) website:

Nope.
Draytek show many of the downstream/upstream (near end/far end) stats back to front, despite what their site says.
Retx is 1 of those.

You cannot have upstream G.INP without downstream G.INP on OpenReach.