Dramatic loss of upload speed

Hi All

I have been on the Plusnet 80/20 profile for over a year and getting about 64/18 until the end of October e.g.

http://www.thinkbroadband.com/speedtest/button/14461...

but ever since then my upload speed has dropped to 4 Mbps

http://www.thinkbroadband.com/speedtest/button/14470...

Is the Plusnet trying to get rid of this profile by stealth?

Alan

In reply to a post by keleus:

Is the Plusnet trying to get rid of this profile by stealth?

I've no idea what you mean by that as you are clearly still on 80/20. My upload has not suffered at all, if those results are consistent, I suggest you report a fault.

Edited by kasg (Sun 08-Nov-15 21:49:20)

Wired or wireless to your router? Have you checked what wireless channels are in use around you?

After all these years it still never occurs to me that anyone would post a speed test result using wireless (unless they were specifically talking about a wireless issue), so hopefully this is not the case (or hopefully it is, depending on your point of view!)

Tell Sharon White.

Linky. (Best to read the linked article to fully understand what I'm saying).

definitely wired

What modem and/or router are you using?
Several Fritz!Box users are reporting unexplained upstream speed loss (sync) since end of October

Thats interesting its a Fritzbox 7390. Ill try and chase that down, thanks.

A few references:
http://forums.thinkbroadband.com/idnet/t/4446576-re-...
http://community.plus.net/forum/index.php/topic,1452...
http://community.plus.net/forum/index.php/topic,1453...
http://community.plus.net/forum/index.php/topic,1455...

thats sort of reassuring (its not just me) thanks. I will try reconnecting the openreach modem and see if that changes the price of fish.

Alan

Just to confirm it doesn't happen on the 7490, with either of the latest firmwares. Seems to confirm the issue affects (perhaps even only) the Ikanos chipset the 7390 uses (but the 7490 doesn't)?

Hello Everyone,

Just to confirm that everyone with a Fritz 7930 seems to be having the same problem, I am with IDNet and FTTC has been working faultlessly for the past 3 years until last month. Upload speeds down to 2 or 3 Mb instead of 17Mb.

I ended up buying a new Fritz Box 3490 and latest Firmware back to 18Mb upstream. I think BT must have done some upgrade to the Network causing the issue.

Best regards

Hmmmmm... I'm experiencing the same dramatic reduction in upload speed. I had assumed that it was something to do with my recent downgrade (last week) from Unlimited Fibre Extra to Unlimited Fibre, but it seems others are seeing this also.

My upload speed was 19Mbps, now it's down to 2Mbps. I am using an Asus RT-N56U router, and I have confirmed that the behaviour is a) consistent, and b) occurring on wired as well as wireless.

I'll be giving Plusnet a call tomorrow...

Plusnet Unlimited Fibre is the Openreach 40/2 product, sold as 38/2 due to ASA requirements.

That's the reason for your drop, nothing to do with what the Fritzbox users are seeing.

Edited by RobertoS (Fri 13-Nov-15 00:32:10)

Ahhhh.. I see! Thanks RobertoS, that makes sense. So I only have myself to blame trying to save a few quid per month

In reply to a post by Seadog:

I think BT must have done some upgrade to the Network causing the issue.

For 'all' 7390s to seemingly be affected around the same time that would seem a logical comclusion.

Just to confirm it doesn't happen on the 7490

I ended up buying a new Fritz Box 3490..

[cynic mode] Given that two of you, at least, have ended up buying new Fritz!Boxes the conspiracy theorist in me starts wondering if AVM (having now dropped the 7390 from their model range) have sent a 'self-destruct' code to generate new sales [/cynic mode]

In reply to a post by Al1264:

In reply to a post by Seadog:

[cynic mode] Given that two of you, at least, have ended up buying new Fritz!Boxes the conspiracy theorist in me starts wondering if AVM (having now dropped the 7390 from their model range) have sent a 'self-destruct' code to generate new sales [/cynic mode]

Yeah, I thought of that one too. My Fritz! 7390 was a couple of months out of its 5 year warranty! Frankly now I find it difficult to tell the practical difference in performance between the two models before this latest problem, apart from the 7490 is larger so it didn't fit on the existing wall fixings. (I know the theoretical difference in speeds/capacity, which I could never attain anyway). It doesn't deal with the line any better. I want them to fix the 7390 now I know it's not just a problem with my box, as my first thought was the modem was failing. But as both seem to run on the same firmware, I don't get what the problem is for the Ikanos chipset. I've not come across an entire modem model "losing" a whole batch of tones before, which is not due to a specific line problem. What's happened? I'd like to know. Presumably the sync "handshake" is going awry, but why just on the upload?

Sorry Robertos, but I am on Plusnet Unlimited Fibre according to my Account details and am on the full 80/20, I also have a Fritz 7390 and have not noticed any significant drop in speed in either direction, apart from when the power has gone down, then I have to wait until about 07:00 to get my speed back up to max.

It seems fairly clear there is a problem with low upload speeds affecting the 7390. What is unclear is what other factors have to be present to trigger the problem.

The chances are that the problem is only occurring on a subset of Openreach DSLAMs. Openreach's equipment is heterogeneous - two vendors, several different line cards and no guarantee that there is a single deployed firmware version for each line type of line card.

According to my box, it is Infineon at the other end if that helps

Which chipset and version are people connected to that are suffering from this speed loss?

I am connected to a Huawei MA5603T and the chipset is:

Broadcom
164.140
B5004244434D
7631302E
00

Which DSLAM uses the Infineon chipset? I thought the ECI uses a Lantiq?

Edited by deleted (Sat 14-Nov-15 12:11:57)

I am not having problems but this is the detail from the DSL page, Infineon is used by Lantiq so mine must be an ECI DSLAM - the originally supplied modem is the Huawei HG621 still in the cupboard from week 1

DSL Central
Exchange

Infineon
11.8.4
4543492074656C65
00
37303335

In reply to a post by elfish:

Which chipset and version are people connected to that are suffering from this speed loss?

I am connected to a Huawei MA5603T and the chipset is:

Broadcom
164.140
B5004244434D
7631302E
00

Same here with the 90% upload speed loss when using the 7390.

Me to I get 74.528 kbit/s 4.480 kbit/s
Using a
Fritz!Box 7390 with DSL Version 1.68.26.20
to
Broadcom
164.89
B5004244434D
7631302E
00

is there any more I can find out?

Alan

I have exactly the same:
Fritz!Box 7390 with DSL Version 1.68.26.20
to
Broadcom
164.89
B5004244434D
7631302E
00

Except, probably coincidentally, I appear to have lost upstream G.INP in the last two days so my upstream has dropped further to 1.7Mbit/s (from 2.4Mbit/s), prior to 30 Oct this was a solid 20Mbit/s.

ASUI Openreach have not been providing upstream G.INP since the ECI modem problem was "fixed" by removing it. On all G.INP-enabled cabinets. That was months ago.

I can assure you that my F!B 7390 was reporting G.INP 'on' in both directions until a couple of days ago (with upstream 'Impulse noise protection' being reported as a value of 40 something, now being reported as 0.1 and CRCs which had all but disappeared are now showing on upstream even at 1.7Mbit/s data rate).

I'd hoped that BTO had abandoned the removal of upstream G.INP. I'd now guess that the (roll-out of) removal of upstream G.INP is still happening (or mine was amongst the last to see this).

Both my old 7390 and new current 7490 on a Huawei cab, showed IMP as 44/41 and on/on both on download and upload. I guess it could be erroneous reporting, especially if as I understand the BT firmware doesn't take adjustment, but the Fritz! firmware still tries nonetheless. And each therefore gives its own readings.

It might possibly explain too why the reported readings are sometimes nonsense. Could it be that the Fritz! firmware is trying some adjustment, perhaps even switching on G.INP on the upload, which is rejected at the cab? But the 7390 and the 7490 then seem to respond differently, the first losing tones and the other retaining them? But for me it took until the week before last for the problem to occur on my 7390, well after when G.INP on the upload was switched off by BT, apparently. At first connection last Thursday the 7490 showed INP off on just the upload, but after a day or so it showed as switched on, where it has remained over the weekend, reboots notwithstanding. Sync speeds and both downloads
and uploads are still the historic normal for for the Fritz! (viz better than the OR modem) for my line on the 7490.

PS Perhaps some good news. A UK user on the Aussie Whirlpool forum reports that AVM have replied saying they are working on it and hope to issue a firmware update soon. Maybe they've identified the cause

Edited by deleted (Mon 16-Nov-15 13:14:34)

That was me Heard nothing from AVM since.

G.INP back on for Upstream, now confirmed by GEA Test:

Profile Name 0.128M-80M Downstream, Retransmission Low - 0.128M-20M Upstream, Retransmission Low

'Retransmission' = G.INP AFAIK.
F!B back to reporting G.INP on both directions, Upstream back 'up' to 2.4Mbit/s, error rate back down to 0

Think I need to see if I can find my OR modem or buy a 7490 or live with reduced up speed for now.

Which GEA test is that, that you have access to please?

In reply to a post by RobertoS:

ASUI Openreach have not been providing upstream G.INP since the ECI modem problem was "fixed" by removing it. On all G.INP-enabled cabinets. That was months ago.

G.INP was reintroduced 2-3 months ago now, both upstream and downstream on Huawei cabs, as long as one's modem supports it. But with upstream, DLM does take it off if errors are very low and puts it back on to Fastpath. DLM will re-apply it if errors start to climb again.

Oh, right! I didn't know that, so thanks. My HG612 is giving this at the moment:-

# xdslcmd info --show
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 1
Last initialization procedure status: 0
Max: Upstream rate = 15634 Kbps, Downstream rate = 59004 Kbps
Bearer: 0, Upstream rate = 15142 Kbps, Downstream rate = 59997 Kbps
Bearer: 1, Upstream rate = 0 Kbps, Downstream rate = 0 Kbps
Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode(0x0)
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 5.6 6.2
Attn(dB): 19.7 0.0
Pwr(dBm): 13.6 7.4
VDSL2 framing
Bearer 0
MSGc: -6 25
B: 243 237
M: 1 1
T: 0 64
R: 10 16
S: 0.1295 0.5000
L: 15691 4064
D: 8 1
I: 254 127
N: 254 254
Q: 8 0
V: 0 0
RxQueue: 48 0
TxQueue: 16 0
G.INP Framing: 18 0
G.INP lookback: 16 0
RRC bits: 0 24
Bearer 1
MSGc: 122 -6
B: 0 0
M: 2 0
T: 2 0
R: 16 0
S: 8.0000 0.0000
L: 32 0
D: 1 0
I: 32 0
N: 32 0
Q: 0 0
V: 0 0
RxQueue: 0 0
TxQueue: 0 0
G.INP Framing: 0 0
G.INP lookback: 0 0
RRC bits: 0 0
Counters
Bearer 0
OHF: 0 557776
OHFErr: 12 240
RS: 3313132456 3485417
RSCorr: 4296319 2493
RSUnCorr: 0 0
Bearer 1
OHF: 110991999 0
OHFErr: 0 0
RS: 887935502 0
RSCorr: 51 0
RSUnCorr: 0 0

Retransmit Counters
rtx_tx: 109722 0
rtx_c: 165360 0
rtx_uc: 98114 0

G.INP Counters
LEFTRS: 2217 0
minEFTR: 60008 0
errFreeBits: 2257427468 0

Bearer 0
HEC: 0 0
OCD: 0 0
LCD: 0 0
Total Cells: 3832951735 0
Data Cells: 301953999 0
Drop Cells: 0
Bit Errors: 0 0

Bearer 1
HEC: 0 0
OCD: 0 0
LCD: 0 0
Total Cells: 0 0
Data Cells: 0 0
Drop Cells: 0
Bit Errors: 0 0

ES: 117 734
SES: 38 1
UAS: 333 311
AS: 1782849

Bearer 0
INP: 48.00 0.00
INPRein: 0.00 0.00
delay: 0 0
PER: 0.00 8.03
OR: 0.01 30.87
AgR: 60058.37 15172.73

Bearer 1
INP: 2.00 0.00
INPRein: 2.00 0.00
delay: 0 0
PER: 16.06 0.01
OR: 63.75 0.01
AgR: 63.75 0.01

Bitswap: 1355328/1355328 8758/8772

#

System up time 95 days 3 hours 41 minutes 12 seconds, with a re-sync about three weeks ago it looks like.

In reply to a post by elfish:

G.INP was reintroduced 2-3 months ago now, both upstream and downstream on Huawei cabs, as long as one's modem supports it. But with upstream, DLM does take it off if errors are very low and puts it back on to Fastpath. DLM will re-apply it if errors start to climb again.


That is consistent with how my new 7490 has been behaving over the last week since it was installed.

GEA test (result) was provided by Plusnet as part of testing for cause of low upstream sync: (excuse lack of formatting)

GEA Test Detail
Circuit ID NA Service ID BBEUxxxxxxxx
Test Outcome Pass
Test Outcome Code GTC_FTTC_SERVICE_0001
Description GEA service test completed and no fault found but unable to check for customer equipment connected to modem.
Main Fault Location OK
Sync Status In Sync
Downstream Speed 69.1 Mbps
Upstream Speed 2.4 Mbps
Appointment Required N
Fault Report Advised N
NTE Power Status PowerOn
Voice Line Test Result Pass
Bridge Tap Not Detected
Radio Frequency Ingress Not Detected
Repetitive Electrical Impulse Noise Not Detected
Cross Talk Not Detected
Estimated Line Length In Metres 257.9
Upstream Rate Assessment Low
Downstream Rate Assessment Reasonable
Interference Pattern Regular Interference Observed Daily
Service Impact No Impact Observed
Interference Duration Longest Occurrence From 13:45 to 22:00
Interference Location Customer Premise
Home Wiring Problem Not Detected
Downstream Policing Discard Rate 0.0
Customer Traffic Level Upstream and Downstream Traffic Detected
Profile Name 0.128M-80M Downstream, Retransmission Low - 0.128M-20M Upstream, Retransmission Low
Time Stamp 2015-11-05T17:00:00
Parameters MIN MAX AVG
Down Stream Line Rate 69.1 Mbps 69.3 Mbps 69.1 Mbps
Up Stream Line Rate 1.7 Mbps 2.3 Mbps 2.1 Mbps
Up Time 869.0 Sec 906.0 Sec 899.9 Sec
Retrains 0.0 1.0 0.0

Post deleted by Graham63

I'm wondering if this report may be something to do with it:
http://www.cerberusnetworks.co.uk/index.php/support-...

See the section on modem/router compatibility. I've asked AVM to confirm that the 7390 and 7490 are compatible and support the necessary reporting being required by BT, and that they are obtaining an approval.

I suspect unless Ofcom intervene (and why should they, their interest seems to be limited to the financial interests of the UK ISP industry), then we have to rely on the single market, well for at least as long as we're still a member of the EU. BT will do as they please as usual, irrespective of the law, if it saves them money on "wasted" maintenance. So AVM need to get worked up about this.

But sadly I think it makes it much less likely that a solution to the compatibility issue affecting the 7390 will be found. BT want to reduce the modems in use, not increase them. They have form, there.

Edited by deleted (Fri 27-Nov-15 13:22:30)

Broken link 404.

In reply to a post by wingco1:

Broken link 404.

Edited, sorry.The link works on my pc though.

This is the link http://www.cerberusnetworks.co.uk/index.php/support-... and in my opinion it is of no relevance
Look what is missing as an example
Home Hub
Billion which definitely supports it
Brief discussion here http://community.plus.net/forum/index.php/topic,1461...

Edited by deleted (Fri 27-Nov-15 13:43:22)

Why would Cerberus Networks be supplying Home Hubs? I thought only BT Retail supplied them (other than they can be bought on the open market). They've also listed the only equipment that they will supply that conforms with these current BT MCT rules providing this OAM Loopback.
They've also stated they don't agree with the rules as they stand.
However, I agree that I don't believe this really hasn't anything to do with the issue being reported in this thread.

Possible fix mentioned over in PN Forums: http://community.plus.net/forum/index.php/topic,1459...

just to close this out

as said elsewhere the Beta firmware from Fritz!box restored my speed to

http://www.thinkbroadband.com/speedtest/results.html...

which is great

Alan

So the latest beta fixes this...... were do we get the latest beta from?

I can only find the german version which doesn't upload to my Fritz 7390

Thanks

I got the beta from a link provided by Fritz!Box. I had registered an issue with them.

Post it?

I'm not sure if AVM would want this circulated, it's a TEST beta and, presumably they'll put it through their 'quality assurance' (delay) process before publishing as an official update.
I think a little pestering from those affected who haven't been emailed a link might be worthwhile.
I haven't received the beta for testing but I've upgraded to a 7490 anyway though I'd want the update whether I'm keeping the 7390 as a backup or selling it.

They specifically didn't want it circulated but as has been said I am sure if you create a ticket they will give you a link to it.

I'm sure anyone who has got the beta firmware is as pleased as punch. But however "sure" they are it does not help those of us that have reported it and have had no response.

I am not impressed by AVM's "need to know" secrecy. We know how to install firmware, and revert if it is not successful. It's beta, for heavens sake. That does not mean that all issues have been resolved. We know that.

Neither am I impressed that they are not forthcoming on the state of the submission and approval of the Fritz!s by BTW. Presumably we have to wait until we hit a problem then they will "look at it".

The Fritz! is expensive kit. and it's their job, not ours, to keep it compatible with UK regulation and BT equipment whilst they market it as such. It's not a fan club, but a commercial transaction.

Yes, expensive kit - Unloaded mine, as I found it always struggled for compatibility on a U.K.system.

Recently bought a (BNIB) 7490 from an ebay seller in NL (was selling several) for £120 + P+P, my line has never performed better, certainly appears totally compatible with UK VDSL, I guess you were unlucky.

I get better reported attainable speeds on the new 7490 too. The reporting also looks more sensitive too, in particular many more errors are reported at the Cab and attainable speeds are dynamic.The modem/DSLAM communication therefore looks to be better. I just wonder whether AVM have simply backported the 7490 firmware functionality to the 7390 in this beta, as development seems to have otherwise stopped for the 7390.

But, lines do differ; and my experience is the Fritz! can struggle with analogue CLI and phantom rings. I'm not sure that any third party modem is the best for all lines. It's what works for you.

Edited by deleted (Thu 24-Dec-15 13:34:35)