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Other broadband queries

High FEC Corrections and CRC errors on upstream

2: Seeker

Can anyone advise if FEC upstream corrections increasing 3000 every 3 seconds is normal...  Just about to clock 100 million in 2 days.

 

I'have had dropouts of IM clients (not broadband connection though) since my line moved from BT to Vodafone.. BT on Fibre has been stable for years before the move.

 

Even disabling wireless on the router, connecting only 1 laptop to the physical port and having no internet activity there is still a 200 per 3 second increase...

 

This says to me something is wrong somewhere... CRC error count is 8775 after 2 days as well, downstream looks good 6 corrections and no CRC errors...

 

I woudl prefer to use my HG612 and synology router rather than this connect piece of crap. or at least for a test to rule out hardware fault. Was told it would go in modem mode by vodafone store when I agreed to move over and that's not available either.

Spoke to VF support, as much use as a chocolate teapot... so hoping someone in the community has seen these high errors before, or maybe someoen from vodafone but I won't hold my breath...

 

 

 

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258 REPLIES 258
Moderator

@willink

 

That's a great question.

 

I shall investigate this query further for you.

 

I'll be back in touch with an answer in due course.

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Moderator

@willink

 

Just an update.

 

I'm still looking into your issue at the moment.

 

In the meantime you can call our Broadband team on 08080 034 515 or speak with them on Live Chat for any further assistance.

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Moderator

@willink

 

I've sent you a private message with details on how to get in touch.

 

For anyone else with the same issue, try the steps listed here and if you’re still affected, contact customer service.

 

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2: Seeker

Hi Dane,

 

I'm experiencing the same exact problem as the person above described. Can you kindly help me out as well? FEC count is going mad, growing by an obscene amount every minute (about 100.000 every 10 seconds). This translates into frequent upload drops for me as far as I can tell.

 

I've had a chat with the broadband team and they leave a lot to be desired. The person I spoke to said they had no training into what FEC Count was, gave me a speed test to do that was programmed in Adobe Flash and when they agreed that there was a problem, said they couldn't transfer me to the Tech 2 team at this time and to contact again tomorrow. When I asked for a case number they said they couldn't provide one and I don't want to spend another 40 minutes tomorrow running speed tests again. 

 

All the best, 

Justin

 

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Administrator

@taranasus Apologies for the delay in reaching your post. 

Please contact us using the information in the private message I've sent. 

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2: Seeker

I have the same FEC problem, your reply has no link to "try the suggestions here" 

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Administrator

@EricHill I've sent you a private message with details on how to get in touch.

 

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4: Newbie

Yet another customer experiencing upstream errors currently. Also my actual speed is lower than the minimum guaranteed speed of 64Mbps quoted in my letter from Vodafone??? (Service went live 11th July)

 

vodafone firmware is 5.4.8.1.291.1.30.1.19

DSL Mode
VDSL
G.993.5 (VDSL)
Bit rate
  DownstreamUpstream
Actual data rate45805 (Kbps.)17256 (Kbps.)
Operating data
  DownstreamUpstream
SNR Margin6.6 dB6 dB
Loop Attenuation17.6 dB21.7 dB
Error counter
Indicator nameDownstreamUpstream
FEC Corrections10872891298609
CRC Error1073535
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Moderator (Retired)

Hi @odyseus10

Sorry to hear that you're having issues with the broadband speeds.

Just so we can rule out a master socket issue. Can you please pop off the front face plate on the master socket? This may be either clipped or screwed on, you can unscrew this and test the socket inside.

Once you've got this connected, please complete another speed test and let us know the outcome.

Thanks

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2: Seeker

duplicated post deleted

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2: Seeker

duplicate post deleted

 

 

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2: Seeker
My connection also has this issue, some times it will stay connected for days and clock up millions of errors other times it'll be a day before reconnecting. I've also noticed that my speed has recently dropped below the guaranteed speed, dropping all the way from 80 down to 52.6. No other issues present on the phone line and it doesn't make a difference if I use the master socket. Today I'm at 800,000 FEC errors with just over 12 hours uptime.
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Administrator

@Lmpuk Let's try a few steps. :smileyhappy:

 

Changing Wi-Fi Channels – Split SSID

You can do this by logging into your router menu:

- Go to vodafone.connect or 192.168.1.1

- Enter the password - vodafone

- In the top right, change this mode to expert mode

- Go to the Wi-Fi tab

- Scroll down and click on split SSID

- You’ll then see the two options, one for 2.4Ghz and 5Ghz, in each section, you’ll see the SSID name – we’d recommend changing the name to have a 2 and a 5 at the start, as you’ll then be able to identify which is which on your device.

- Hit apply

Changing Wi-Fi Channels

- In the Wi-Fi tab, go to settings from the left menu

- Here you can change the channel of the 2.4Ghz/5Ghz channels from Auto.

- We’d recommend either 1,6 or 11 on 2.4Ghz
- Run a speedtest before you change the channel and then another afterwards, as you’ll then be able to see any difference it has made. 

 

Let us know how you get on with this!

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10: Established

@Alex - how do you suppose changing wifi channels or splitting the SSID is going to help with FEC?

 

@Lmpuk - you probably know this already, but a huge amount of FEC may be attributed to a line issue - essentially the number of errors that have been corrected in your VDSL signal.  You can start with the things you can affect, namely change the cable connecting the router to the master socket.  Also, remove the faceplate of the master socket and plug directly in to the test socket (with a microfilter).  You should also have a think about any other new electrical devices in the home or those near the router/socket - could these be interfering with the signal?  Given you seen Ia large speed decrease, then I'd raise a line fault after checking the above.

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4: Newbie

Well I have re-connected my old TO-Link router and now I don't get loads of uploads CRC errors..so maybe its the Vodafone router.  I cant believe a line fault would cause errors one way and not the other??

I will leave my old router connected to see if my speeds improved, if not then Vodafone will need to investigate because my Guaranteed speed is supposed to be greater than 64Mps not the current 41Mps??????

 

  Upstream DownstreamCurrent Rate (Kbps)Max Rate (Kbps)SNR Margin (dB)Line Attenuation (dB)Errors (Pkts)

1332741318
1656552261
63.4
22.617.4
71883
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10: Established

@odyseus10 wrote:

Well I have re-connected my old TO-Link router and now I don't get loads of uploads CRC errors..so maybe its the Vodafone router.  I cant believe a line fault would cause errors one way and not the other??

I will leave my old router connected to see if my speeds improved, if not then Vodafone will need to investigate because my Guaranteed speed is supposed to be greater than 64Mps not the current 41Mps??????

 

  Upstream DownstreamCurrent Rate (Kbps)Max Rate (Kbps)SNR Margin (dB)Line Attenuation (dB)Errors (Pkts)

1332741318
1656552261
63.4
22.617.4
71883

Cant quite remember the reasons, but on ADSL upload used a different portion of the spectrum so that why attenuation/SNR is reported separately - and therefore why some faults can affect one or the other.  If the TP-LINK is good, then possible an issue with the VF router causing interference - it is an electrical device after all!

It could take over a week for your line to start to improve, depending on who long the issue had been going on for.

Hope it does improve!

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4: Newbie

I certainly hope it improves, if not then I might revert to the cheaper 38Mbs package or Vodafone will need to investigate the line..

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2: Seeker

So I started to experiment with my router and network. I removed my power line networking plugs and also moved the Hive hub and the FEC errors have reduced. It has had the weird effect of creating around 10 CRC errors an hour instead. 

 

I haven't followed the suggestion of changing the wifi channels as the speed issue is not on my devices but on the router back to the Vodafone network.

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1: Seeker

Hi

I reported the problem of High Upstream FEC corrections to Vodafone last year.  (approx 1 million corrections every 10 minutes)

After a lot of investigation it was found to be the Modem/Router supplied by Vodafone.

When a different Modem/Router was tested on the line No FEC corrections were observed (small amount).

Until a fix is completed the only way around this is to use a third party router attached to the Modem.

 

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