Migration Speed drop (ADSL24 to Coms)

After the initial migration from the O2 provided ADSL24 to TT provided Coms i noticed a speed drop, firstly as i was no longer on 3db but also my upload took a big hit. After complaining i was moved from TT to what seems to be Enta BT21CN, i'm now on FastPath and 3db. Yet i'm still synced at less than i would be via O2 ADSL24. My upload has more than halved and my download is still not what it was... Nothing has changed Hardware wise.

Anyone know why this would be?

Before: O2 ADSL24 (3db FP)
http://i.imgur.com/R99slmr.png

Current: Coms BT/Enta (3db FP)
http://i.imgur.com/Zui8blx.png

When i was first migrated to TTB (FP 6db)
http://i.imgur.com/Ax7I4Lf.jpg

My download speed is around the same as it was with ADSL24 but my upload speed is just over half what it was.
I can only think they've not sorted out all the bugs in their system yet. Especially as we were promised double the upload speed we used to have.

However I had to change my router as for some reason the Netgear DG834GT I was using wouldn't connect to their network. I tried several different firmware versions but didn't have any success so using a cheap ZyXEL for now.

Edited by DooGie (Fri 21-Feb-14 22:08:03)

First edit wasn't good enough . You've got "download" twice in the first line.

The main difference between O2W and TTB is the SNR profiling.

Whereas O2W profiles used to (generally) be the same up and down, the TTB upstream SNR is always higher than the downstream.

This means slightly lower upstreams. Annex M, if possible, can help with that though but it is not suitable for all.

Matt

In reply to a post by RobertoS:

First edit wasn't good enough . You've got "download" twice in the first line.

Agreed

Matt: Am I right in thinking that Annex M would be pointless on my line?

Might see a very small increase in upstream, likely a drop in downstream.

We only recommend Annex M over 16Mb but might be worth a try, assuming you can downgrade again.

Matt

Well on O2/Be at 16Mbps sync on Annex A, the typical change on Annex M was a loss of about 2.5Mbps downstream with a tiny gain on upstream.

As the line got shorter, the loss of downstream decreased and the upstream gain increased. At around 20-21Mbps Annex A there would be zero downstream loss and close to 2.5Mbps upstream sync.

Post deleted by uno

Heh .

I'd love to know what was there.

Edited by RobertoS (Sat 22-Feb-14 00:03:13)

I've asked about Annex M, doubt they will try it.
Not sure what to do.. Any benefit going elsewhere?

The apartments next to me (400 m away) have just had a fibre cabinet installed (Live in May) although a different cabinet number to my building I'm hoping BTO see sense and install one for ours.

Edited by Binary_Digit (Sat 22-Feb-14 17:38:05)

Not really sure which is the correct thread to discuss my issues and I seem to have posts spread all over the place.

Anyway, for info, here is today's installment to my ongoing ticket. My normal speeds prior to migration were 6.3 to 7Mbps down and 0.88 up, and my normal ping is 11ms:

Dear Sir/Madam,
Connection speed has dropped right off again and I can barely use the internet today:

2/22/2014 7:01 PM GMT109.224.XXXXX1.66 Mb/s 0.29 Mb/s 90 ms London

This ticket (inc. previous ones that you closed without fixing the problem) has been open for over 1 Month now and I've not had a single reply to a ticket for almost 1 Week.

I've give you plenty of time to resolve teething problems with the ADSL24 migration but absolutely nothing appears to be getting done and therefore if my issues are not resolved within 1 Week from now I will be asking for a MAC code to move elsewhere despite your offer of 2 Months free broadband and phone - 2 Months free is no good if I barely have a usable connection.

EDIT: SInce posting this 35 mins ago, downstream speeds are down to 0.8Mbps.
Interesting thing is, the router is still syncing at over 8000kbps.

Edited by deleted (Sat 22-Feb-14 19:37:22)

Why wait it wont get any better, the service is oversubscribed and cant cope with the traffic at peak periods.
I've been with ADSL24 since 2007 but after last weekend I got my mac and have used it already.
When you cant even open the speedtest web page you know it's time to move on.

Speeds have been fine for me at peak times

Speeds fine for me too at peak.

I consider this peak time and I'm getting about 8mbps at the moment, the most my line can handle.

I have considered migrating myself but it's not worth the costs and hassle for 4 months I live here (I'm a final year uni student).

Getting slightly off-topic, I raised a ticket for my profile to be changed earlier today as I grew tired of waiting the line options under My Account to appear. Within half an hour, it'd been changed as requested and they had called me to check it was working ok.

Edited by deleted (Sat 22-Feb-14 21:40:54)

.....And just 2 hours later with no explanation whatsoever I've suddenly gained an extra 6Mbps.....

2/22/2014 9:54 PM GMT 109.224.XXXX 6.92 Mb/s 0.80 Mb/s 13 ms


Wild swings like this from one hour to the next.

Edited by deleted (Sat 22-Feb-14 21:59:02)

I'm looking at moving on too. My sync speed down has dropped by about 500bps since migration, but i was only about 4kbps before migration (i'm on a fairly long line) - so not the end of the world. The main thing for me is outages and disconnects, whether it's dns, a 3 day ip lease period, or whatever. So while I expect I will move on after 7 years, I'll probably spend several months deciding which isp to move to - though I'll be moving to fibre when I do switch so things should be much better.

I'm not nit-picking, but unless your router is disconnecting and reconnecting your connection speed isn't changing. If that is what you report in tickets or over the phone, it won't help you get the problem solved.

If your router is indeed disconnecting and reconnecting, that's what you need to be reporting.

If it isn't, then your throughput/speedtest rate is changing. Probably due to congestion, but there may be other reasons. A sudden speed jump at 9pm suggests to me "other reasons", (even a reconnection), though you may also have the same one as the others are experiencing.

Roberto, thanks for your reply.

My router shows this, and this matches what Coms are telling me:

System up time:12 day(s) 14:20:26

Yet my logs show this every day:


1 2014-02-22 16:09:23 PPP Warning ppp0 LCP down
2 2014-02-22 16:09:23 PPP Error ppp0 LCP down
3 2014-02-22 16:09:01 PPP Error ppp0
4 2014-02-22 16:09:01 PPP Error ppp0 User request
5 2014-02-22 16:06:41 PPP Error ppp0
6 2014-02-22 16:06:41 PPP Error ppp0 User request
7 2014-02-22 16:06:35 PPP Warning ppp0 LCP down
8 2014-02-22 16:06:35 PPP Error ppp0 LCP down
9 2014-02-22 16:06:34 PPP Error ppp0 User request
10 2014-02-21 17:05:30 PPP Warning ppp0 LCP down
11 2014-02-21 17:05:30 PPP Error ppp0 LCP down
12 2014-02-21 17:05:10 PPP Error ppp0
13 2014-02-21 17:05:10 PPP Error ppp0 User request
14 2014-02-21 17:05:06 PPP Warning ppp0 LCP down
15 2014-02-21 17:05:06 PPP Error ppp0 LCP down

My router constantly shows this:

Upstream Downstream
Current Rate (Kbps) 1016 8087
Max Rate (Kbps) 1028 9220
SNR Margin (dB) 5.9 6
Line Attenuation (dB) 27 52
Errors (Pkts) 0 0

Yet my speeds vary from not being able to open the speed test page, right up to 7Mbps downstream.

I asked Coms to increase SNR to 12dB, still had same issues, then to 15dB, and still had disconnections etc. SNR now varies by itself between 3dB and 6dB

I don't know what this means but it always gives a fail on ATM OAM segment Ping:

Test Internet surfing
Test xDSL Synchronization Pass
ATM OAM Segment Ping Fail

Router wired directly into test socket. Same issues with multiple routers, Router connected directly to PC via Ethernet. I have up to 9 wireless devices connected via Wi-Fi bridge around the house with DHCP switched off and fixed IP's, there doesn't appear to be any bandwidth leakage.

I had these exact same problems with previous broadband supplier both pre and post LLU, but when I moved to ADSL24 in around 2009 things improved and I'd only have connection issues once every 3 to 6 Months (on LLU), but they were fixed by adjusting settings i.e Interleaving SNR margin, or, BT engineer working on the line.

But all of the above disconnections and wild speed swings have only existed since migration to Coms.

tracert gives me: te5-3.telehouse-east2.core.enta.net
and: te4-4.telehouse-east.core.enta.net

When my connection is down my phone line crackles, when the connection is up the phone line is perfect.

I don't think Coms know what to do.... they're reluctant to get an Engineer out because they say the line tests ok.

Some disconnections last for 2 to 3 days at a time followed by a sudden re-connection at dial-up speeds for a day or 2, then disconnections again, then suddenly everything working perfectly again.

My feeling is its one of those green boxes in the street, possibly water ingress as I know a lorry reversed into one some years ago and almost flattened it.

If anyone has suggestions I'd be very grateful.


EDIT: One other thing I should mention, speed-test.net has recently started putting my location as Liverpool and tests via a server in Douglas (Isle of Mann) based on ping, yet I'm actually based in London but when using a London server my ping has dropped to circa.35ms whereas it used to be circa.11ms.

Edited by deleted (Sun 23-Feb-14 13:09:19)

If you are hearing crackling on your line there is a very good chance you have an HR (high resistance) connection somewhere, water ingress being the most likely culprit, probably in the DP on the pole. If that happens the impedance of the line will increase and the signal-to-noise ratio get worse, in effect meaning worse reception with lots more noise over the top causing your modem to throw a wobbler. Of course the problem is that because of BT's stranglehold on the network if you ask for a line test you'll likely get an un-asked-for BT visit and a hefty BT charge (£120?) when they declare their network is perfect, something the regulators need to change. If you put a voltmeter across the BT line pair you may in fact see the voltage swinging about from the standard 50v dc showing a line fault.

As an aside, I don't know if some of you are aware that all modems are not equal. Ages ago when I had my previous BT brand ASDL modem on my newly upgraded ADSL2 line I was still getting a maximum of 8Megabits/sec. It wasn't until I was reading my modem manual that I suddenly realised my existing modem maxed out at 8Mb/s. I bought a new TP-Link modem designed for ADSL2 and bam, instant 16Mb/s. So if some of you are using old modems you may need to upgrade to a better modem, you might suddenly see a much better speed!

You're not the only one with this problem. I didn't get great results on the C&W ADSL24 packages, but switched early last year to their £18.90/month LLU package (believe it was BT?) and was getting these results: http://www.thinkbroadband.com/speedtest/results.html...

Now I'm lucky to get 6Mbps down and 0.45Mbps up, even having requested the line profile be reduced to 9db. Surfing is slow esp in the evenings. I'd like to hear from Coms.com about this.