Kitz Forum

Broadband Related => FTTC and FTTP Issues => Topic started by: guest on December 19, 2013, 03:11:55 PM

Title: (Not) Smooth as silk on Sky, read on...
Post by: guest on December 19, 2013, 03:11:55 PM
This is a copy of a post I made to Sky forums :

--start

Someone asked me to post how I got on with my ADSL->VDSL ("fibre") self-install move so here we go :

6/12/13 - ordered the 80/20 service via phone;

10/12/13 - letter arrived with install date of 19/12/13;

12/12/13 - router arrived;

19/12/13 - first blip offline at 13:50, line went dead at 1400, line still dead at 1415 so I went down to the cabinet to chat to the Openreach guy. I'm the first one on the cabinet and he had to go back and forth to exchange checking just to be sure he'd done it right as its the first one he's done where he can't test using the JDSU from the premises. Nice guy and I've seen where he's put the pair (top right with a lot of space to the side) so looks good for minimising xtalk in the PCP. Poor sod lives where I used to, no FTTC and the lines are rubbish.

Went back home and line was sync'd at 80/15 which didn't look good. Speed looked awful (75Mbps d/s, 4Mbps u/s) so I disconnected MER and rebooted the router.

Stats after reboot look better :

D/s rate 79987
U/s rate 20000
D/s atten 14.7dB
U/s atten 0.0dB
D/s margin 19.7dB
U/s margin 21.21dB (looks like a dodgy value to me)

UK speedtests give 75Mbps+ downstream and 18.5-19Mbps upstream with latencies varying from 9 to 16ms.

Only worry really was some call from Sky that the callblocker rejected (shouldn't have, you guys have pressed the right button to get through before) - was wondering if that was a "your order is delayed".

--end

So for anyone worrying about Sky being useless, then they can actually do things right. I think the key is not to phone up asking about dates, the ones in the letters are always correct. If you phone up then you run the risk of someone messing things up, then (AFAICT) everyone plays "pass the parcel" with the problem.

The SR102 router did require a reboot however after being connected on ADSL and then moved to VDSL to get a normal upstream sync.

First on the cab, things can only get worse from here - "nice" thing about these (rubbish) Sky routers is you can't get near the extended linestats in any reasonable way so I just don't bother monitoring it now  :lol: If I have problems then I'll deal with it then.
Title: Re: Smooth as silk on Sky, but read on...
Post by: BritBrat on December 19, 2013, 03:21:57 PM
I was on Sky ADSL2 for quite a few years until I just switched to BT.

And you know how that went  :(

I would go back to Sky again no problem.

Once you get a BT support who speaks English (hope thats not racist) things get sorted.
Title: Re: Smooth as silk on Sky, but read on...
Post by: guest on December 19, 2013, 03:47:18 PM
With Sky the key is being able to phone up between 9am and 5pm IMHO. If you can do that - not always easy - then you don't get the runaround IME.

We'll see how it goes - this is on a c2001 vintage ADSLv1.0 socket BTW.
Title: Re: Smooth as silk on Sky, but read on...
Post by: guest on December 19, 2013, 04:42:38 PM
Ahhh its never going to be this good again - insanely low ping (8ms average no traffic) and its like a LAN for most things.

Really nice to see it all the same, guess I have to hope the FTTC cabinet (2x140 pair feeds in PCP, must be 288-port FTTC cab?) has the cpu for all of this when it fills.

7ms ping to Tranquility (Eve Online) - that's insane  8)
Title: Re: Smooth as silk on Sky, but read on...
Post by: BritBrat on December 19, 2013, 04:51:13 PM
Stop drooling.  :) :lol:
Title: Re: Smooth as silk on Sky, but read on...
Post by: guest on December 19, 2013, 06:35:10 PM
It gets worse (in terms of drooling).

Currently have a 6ms ping to forum.kitz.co.uk

I wish I still did twitch gaming  :lol:

Edit - anyone googling in future on PCP32 on the EMGLNFI exchange, well read it and weep, you'll never see ping times like this again unless you're first on your ISP  8)
Title: Re: Smooth as silk on Sky, but read on...
Post by: BritBrat on December 19, 2013, 06:53:49 PM
Thought I would see what I get:

Quote
Pinging forum.kitz.co.uk [185.24.98.37] with 32 bytes of data:
Reply from 185.24.98.37: bytes=32 time=17ms TTL=46
Reply from 185.24.98.37: bytes=32 time=18ms TTL=46
Reply from 185.24.98.37: bytes=32 time=17ms TTL=46
Reply from 185.24.98.37: bytes=32 time=17ms TTL=46
Title: Re: Smooth as silk on Sky, but read on...
Post by: guest on December 20, 2013, 07:58:51 AM
Spoke too soon :(

There's a fault somewhere - line desyncs when the phone is off the hook (fine when it rings). Removed ADSL v1.0 faceplate, plugged into test socket and swapped out microfilters, no difference. Currently trying to find some old wired phones just to rule everything out but I can't see that being the problem.
Title: Re: Smooth as silk on Sky, but read on...
Post by: BritBrat on December 20, 2013, 08:06:54 AM
I  guess you have put a dangly filter in the very internal test socket and connected the modem through that.
Title: Re: Smooth as silk on Sky, but read on...
Post by: guest on December 20, 2013, 08:28:08 AM
Yes, also physically disconnected the one extension running from there. Can't find these old phones - driving me crazy as I know I saw them somewhere in the last couple of weeks.

Its not going to be that though - I think the Openreach guy is going to have to revisit his cab work and check again.
Title: Re: Smooth as silk on Sky, but read on...
Post by: BritBrat on December 20, 2013, 08:36:48 AM
Can't find these old phones - driving me crazy as I know I saw them somewhere in the last couple of weeks.



I had same thing, asked  wife if she had seen it "NO"

Turned up in garage where she put it.
Title: Re: Smooth as silk on Sky, but read on...
Post by: guest on December 20, 2013, 08:40:41 AM
Zoe (17070 on Sky) says she can hear echo and some noise so I reckon the Openreach guy has introduced a fault when crimping/punching connections in the cabinet. Will give Sky a call in 30 minutes or so.

Edit - yeah there's a 3dB change in noise margin when the phone is off the hook. He's spannered it at the PCP is my bet.
Title: Re: Smooth as silk on Sky, but read on...
Post by: guest on December 20, 2013, 09:36:19 AM
Service tests passed but he could see zero sync during the test so it has to be authorised by the Fibre Customer Solutions people who are supposedly calling back between 2-3pm.

Line desyncs when the phone goes off hook, resyncs during the call (at the same speed) then desyncs when the phone goes back on the hook.

Hmm the upstream margin drops to 6.6dB when the phone rings and then gradually increases to 10dB when left ringing. Goes back to the (slightly suspicious IMHO) "normal" margin of 22.22dB when phone stops ringing. Edit - actually it increases back to 22dB if you leave it ringing for 20-30 seconds.

This is a HR fault I reckon - been running some more tests and the upstream margin will drop to 6dB, then as the call continues the margin gradually increases back to 22dB. Hangup and the upstream margin drops to 3dB and gradually increases back up to 22dB.

Edit - Nothing else it can be really, line doesn't desync on incoming calls as the margin is 6dB (presumably due to current already flowing), does desync (then resyncs) when phone is taken off hook to make call as the margin goes to 2.2dB then gradually increases back to 22dB (without dialling). OR bod needs to go remake his connections I reckon as that's the only thing at the PCP which has changed in the last 11 years.

Makes no odds whether there is actually a phone connected or not in terms of the margin changes when receiving a ring signal.

If anyone can think of anything else that its likely to be then I'd appreciate hearing it :)
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: guest on December 20, 2013, 12:13:26 PM
Not sure I understand this one at all.

I have now removed all telephony equipment, physically disconnected the one and only extension and am connected directly into the test socket without a filter - mainly so nobody tries to use the phones, this connection has been up and down more times in the last 24 hours than in the last 2 years and DLM will have its revenge.

Removing the filter* has increased the downstream noise margin from 19.7 to 23.1dB and has taken 1dB off the d/s attenuation. Seems like rather a large increase in margin to me but I've never tried a router straight into the test socket so who knows? Tested incoming calls like this and seems to stay up OK although the u/s noise margin still drops alarmingly.

Nothing else I can do, I've even been naughty and gone into the back of the master socket just to make sure that the A/B screws hadn't worked loose over the years. They hadn't and nor is there any sign of condensation/moisture.

Two wires into the house wired directly to router, no filters, no telephony stuff, only thing I haven't checked are the gel crimps where the old master used to be but I can't see that being the issue as they are in the backbox and not external - if it is them then its on BT's side of the demarkation line anyway.

Got to be some connection made/broken yesterday when I was switched to VDSL.

*tried 6, they're not faulty
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: BritBrat on December 20, 2013, 12:31:59 PM
I feel for you as most of that sounds like how I started, but it will get fixed. So dont be to down on yourself.
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: guest on December 20, 2013, 12:46:44 PM
The annoying thing is that apart from the mother-in-law, the only incoming calls we get on the landline are spam calls. We all have mobiles on the same network (3) so none of us "call home" either.

VDSL works perfectly as long as no POTS stuff is happening.

We'll see what happens when/if Sky call me back this afternoon. I reckon all it needs is the OR guy to go back and remake the crimps and IDC connections in the cabinets. Provided he contacts me at the time then I can tell him when its sorted even if he can't see anything on his JDSU - cabinet is 100m from the front door so its easy-peasy for me to give him feedback in real time. All the cabling around here is underground and we've had 13mm of rain this month so it is unlikely to be moisture/weather related. Dodgy crimp is my bet.
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: guest on December 20, 2013, 02:27:22 PM
Openreach coming around on Monday morning.

I declined a visit tomorrow morning as I don't believe they'll turn up - Saturday before xmas, grief from other half etc?

Helped I could tell the Sky guy immediately when he'd initiated a line test and when he'd finished simply by watching the u/s noise margin (3 sec repeat isn't great but better than nothing).

Now I have to move the filing cabinet for the first time in 9 years. This is not going to be pretty :D

Actually sod it I think I'll ask him to "move" the master socket back to the original location while he's here - he's no doubt going to fit a VDSL faceplate anyway. Would involve cutting two crimps at original location and fit A/B to terminals. 2 minutes and its done. Saves him buggering about with the extra 20m of cabling BT installed in 2000 so you could use a USB modem from the (compulsory) fitted faceplate.
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: guest on December 20, 2013, 03:45:53 PM
Not sure this is a good start to the "self-install" era.

21Mbps @ 3dB margin results in 10-15 CRC errors per day for over a year on ADSL.

First ever install on a cab/exchange where engineer doesn't go to premises and its not good - to the extent that remote line tests can drop the u/s noise margin by 16dB.

I can obviously do the diagnostics but frankly if I hadn't been checking the logs on the Sky router I'd never have seen this. A quick check on the Truecall unit/MySky showed all the sync drops were related to POTS stuff.

Perfect line (as far as possible), filtered faceplate (ADSL v1.0) and it goes tits up in implementation.

I think self-install on VDSL is going to be a short lived product.

This is where the BTOR guy has double checked as it the first self-install (ie no access to premises) that he's done and where there is a "techie" EU who knows what is going on.
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: BritBrat on December 20, 2013, 04:07:27 PM
Mine was an enginner install and it went worse than yours.

So I would not rule out self installs yet.
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: guest on December 20, 2013, 04:28:20 PM
The thing is that I wouldn't have noticed this if I hadn't been aware of DLM and was checking logs.

First I'd have known was DLM kicking in which will tend to suppress the underlying problem.

We'll see.
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: guest on December 21, 2013, 06:59:15 AM
DLM has indeed kicked in, its applied a lot more INP and d/s sync has dropped to 77694.

Fortunately for me its still easy to see the u/s noise margin drop when you call the line.
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: guest on December 22, 2013, 08:24:40 AM
No resync during the night so DLM thinks the line is looking OK, which is good :)

That will hold things in the event the BTOR guy doesn't show/has to get another engineer out. Not ideal with no landline phone at this time of year but we have mobiles.
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: kitz on December 22, 2013, 11:14:18 PM
Quote
Openreach coming around on Monday morning.

Good luck and I hope he gets it sorted for you.

Quote
First ever install on a cab/exchange where engineer doesn't go to premises and its not good - to the extent that remote line tests can drop the u/s noise margin by 16dB.

I could be wrong, dont think this is self install related. Ive been there too on a Engineer home install.  My upstream could drop by up to 21dB meaning a resync at just 8-10Mbps on the upstream.  I cant prove it but Im pretty certain that my line fault was 2 separate issues (so was the engineer who coined the term "double whammy").  The upstream EMI like SNR fluctuation I saw seemed to be resolved after replacing some very obvious corroded joints.   The 2nd problem that continued after that was the loss of sync etc when the phone rang.

Im sure Im not alone in noticing that there seems to be a fair amount of lines that were good, but after moving to FTTC they suddenly start seeing upstream SNRm drops during voice related usage.   Theres certainly been a few on these forums that have experienced it.   Convincing BT though is the hard part :/

I will pass on one tip ...  if the engineer says he cant see any records of your resyncs and implies you are making it up.  Its not unusual for the engineers whoosh results/report to not show resyncs that have happened very quickly.   I felt a right fool when one of them was adamant that my line wasnt resyncing...   all I can say is thank goodness for dslstats to prove my point.
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: guest on December 23, 2013, 07:16:15 AM
Well I can show him upstream dropping to 3dB from what is now 15dB margin. I can also show him packet loss at the IP layer which starts when you initiate an incoming call and stops exactly at the moment you hang up. No telephony equipment connected on this side. 100% repeatable.

Likewise I can show him that the VDSL disconnects every time the handset is lifted to make an outgoing call. I can also demonstrate that the margin will increase once a call is in progress. All also 100% repeatable.

If he tries to give me any bs then its not going to end well, I can tell you that ;)

Interestingly someone has just reset the DLM/forced a resync on the line right now. All stats back to where they were on Thursday. 79987/20000kbps 20/22dB on the margins.
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: guest on December 23, 2013, 08:27:53 AM
Its fixed. Just required one of the VDSL faceplates to properly terminate the line. SFI engineer says he's seeing quite a lot of this lately and the ISP supplied microfilters don't work properly on high rate lines.

Stats on the line are (in his words) "******* amazing". Zero FEC errors and a noise level he's never seen as low before. He's also never seen a test run for 5 minutes producing zero FEC errors with a line sync'd at max rate/minimum INP.

I pointed him at this site as he's got no idea about locating REIN - says he keeps asking to be trained but it never happens.

Oh and kudos to Sky as putting this through as a "Care" job.

Fingers crossed that his JDSU tests didn't push enough current through something to remake the joint. We'll see.

Oh and my attainable d/s rate is 116Mbps  8)

Edit - oh and FWIW he said the ADSL v1.0 faceplates "don't work properly" with VDSL. I suspect all of this is more down to impedance matching than filter response but without borrowing a spectrum analyser its impossible to say either way.

[Edited for language]
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: BritBrat on December 23, 2013, 09:11:48 AM

Im sure Im not alone in noticing that there seems to be a fair amount of lines that were good, but after moving to FTTC they suddenly start seeing upstream SNRm drops during voice related usage.   Theres certainly been a few on these forums that have experienced it.   Convincing BT though is the hard part :/


Add me to the list :)
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: guest on December 23, 2013, 10:27:21 AM
OK as I posted over at Sky forums I have now tested this with :

a) latest BTOR VDSL faceplate;

b) PMF320P-SKY Rev1A (and Rev 0A) microfilter.

The noise margins do not drop with the faceplate fitted.

The noise margins do drop with either of the Sky microfilters fitted. Incidentally they also drop with every other microfilter I can find but I'm not re-testing them as the DLM monster will come to visit over xmas if I do that :P

So there's something in the latest revision of the BTOR faceplate which deals specifically with some troublesome aspect of POTS signalling/etc that wasn't required on ADSL.
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: kitz on December 23, 2013, 11:59:35 AM
Quote
ts fixed. Just required one of the VDSL faceplates to properly terminate the line. SFI engineer says he's seeing quite a lot of this lately and the ISP supplied microfilters don't work properly on high rate lines.

Excellent :D  Im so glad its all sorted for you  :clap2:

Quote
He's also never seen a test run for 5 minutes producing zero FEC errors with a line sync'd at max rate/minimum INP.
Reminds me of what one of the engineers said about my line.   ie there was nothing wrong with my line because it wasnt recording any FECs.  The hundreds of CRCs didnt matter since they could correct themselves.   Just say this did not go down to well with me as I tried pointing out that the line wasnt interleaved and perhaps he misunderstood the difference between CRCs and FECs.      :mad:

Quote
FWIW he said the ADSL v1.0 faceplates "don't work properly" with VDSL.
Suitable point to mention that there was also a bad batch of VDSL faceplates that fail.  These were supposedly from earlier this year and the newer ones should be ok.  Sub-contrators such as Quinns may have a few still knocking around though.

Quote
Oh and my attainable d/s rate is 116Mbps

Fantastic.   You have plenty to play with :)  Since you know that you are first on your cab and very close it would be interesting to record how much this goes down as more users go over to FTTC.   You may not be too bad as iirc you also have cable in your area to soak up some of the demand.

Youre nearer to a cab than me so you may see the effects of x-talk a bit more.   I wasnt the first on my cab as Id left it a while (Sky buying BE was my push).   I started at about 106/37 Mbps and its now down to about 87/30 Mbps.  My SNRm is now down to about 8dB and for the first time (line fault aside) ever Im seeing frequent E/Secs on this line.
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: BritBrat on December 23, 2013, 12:27:25 PM
Quote
Suitable point to mention that there was also a bad batch of VDSL faceplates that fail.  These were supposedly from earlier this year and the newer ones should be ok.  Sub-contrators such as Quinns may have a few still knocking around though.

I may have had one fitted two weeks ago by a Kelly enginner.
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: guest on December 23, 2013, 12:40:06 PM
The thing that freaked him out somewhat was that there were no errors at all on any of the counters on the JDSU. None. He thought the test head had gone again :)

I can't remember the dB/Hz reading he got for noise but it seemed somewhat remarkable to him.

He re-ran the test and got one FEC but that was probably one of the kids turning on the light/extractor fan in the bathroom.

I'm fairly astonished at the noise margins TBH. Wasn't expecting 20dB on both by any means - as I said to you if there's going to be issues then it will be on upstream. Guess I got the mains filtering nailed down tight :)

Re the ADSL v1.0 failures - doubt this was one as it held 21Mbps @ 3dB with an average of 10 CRCs/day. Ignore that bit, misread your post. I think the extra chokes in the latest version of the VDSL faceplate are there for POTS reasons and not REIN. Might give it a few months until they appear consistently online and buy one, have a play and see what the chokes are for.

Re xtalk - its a big PCP, 2x140 (144 surely?) pair cables to FTTC cabinet. Large Virgin presence around here though - mainly due to BT leaving it late on everything from 256kbps ADSL to FTTC. Always amazes me that Braunstone/New Parks (large and very unpleasant council sink estates) got everything from BT before an area like Glenfield which although nearby has a shedload more "disposable income". Virgin, Sky, Be, TalkTalk - they all worked that out years before BT did/does. Eg the next-door neighbour could only get 2Mbps from BT for 3 or 4 years while I had ADSL2+ from Be and then UKOnline (Easynet). tl;dr is I dunno, anyone who wanted "superfast" around here has probably long since moved to Virgin but they may come back now.

The problem for me in measuring attainable rate is this Sky router which does auth via MER. I may summon up the will to do something about that but frankly most of the VDSL2 kit on the market in the UK looks garbage in terms of specs. Fritzbox stuff is solid (7 year warranty/upgrades helps) and I see Draytek still have their fans - and garbage support for anything meaningful. I'll probably do what I did when I first joined Sky - use their kit for a few months then see what's around/what I can be bothered doing.

BTOR SFI was very impressed with some of the stats you guys are pulling out of unlocked BTOR modems - I showed him one and said look at the peaks on the QLN graph, in that case they were radio stations but they could just as easily be local REIN, so you know what to tune to when you're doing a walkabout. I pointed out to him that the usual "tune to 612kHz" advice isn't decent for VDSL - need a small shortwave radio that covers all the way up to the 16m band, or 17.9MHz for those of you who don't have a radio background. Needle in a haystack time unless you can see real-time graphs.
Title: Ends well...
Post by: guest on December 23, 2013, 02:24:16 PM
I'm going to call it closed on this install/fault for now and I'm going to pick up one of these faceplates next year and have a look at it.

Sky have been spot-on in terms of support but as we're not into the official self install for another 8 days then that may well change. For now they did better than Be and Zen when I had problems so they do deserve a +1 from me - which is a rare thing these days :)
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: kitz on December 23, 2013, 06:58:00 PM
Glad for you that it was sorted so promptly :)
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: guest on December 23, 2013, 07:21:47 PM
They did a good job and I doubt anyone here would be unhappy with a callback on time within 6 hours of initial fault report and a BTOR SFI bod on your doorstep inside 72 hours - I turned down the Saturday appointment so it could have been less than 24 hours.

Sky get a lot of stick which largely isn't justified IMHO. Main problem they have is that they can't tell who you are (usually) on the forums so it turns into forum ping-pong rather than anything sensible. That makes them look like idiots - which in some cases is a justified assessment of some of their "social media" team. May just be me though as I have been hit with the banstick once over there by someone who no longer works for them ;)

Phone up 9-5 and things just get sorted IME. Outside those hours I'm sure kitz has a virtual cat you can stroke to make you feel better :P
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: Chrysalis on December 26, 2013, 11:25:01 AM
of course zero FEC is perfectly normal for fast path lines, is your line fast path?

rizla regarding disposable income, I have always had the view the poor rely more on the internet (and tv) and as such they spend more of their income on media type services including the internet eg. they may get the top tier VM package just so they can torrent all day avoiding having to buy movies/games.  There does seem to be a priority attitude shift between different income groups , nearly all the wealth people I know are using talktalk as their isp because they cheap and go for the cheapest packages.  Yet they think nothing of going on multiple expensive holidays every year.

Also braunstone and glenfield both got FTTC late.  The first areas in leicestershire to get FTTC were the outlying villages and towns such as narborough, rothley, mountsorrel etc.  Then 'much' later after those was the 2 city exchanges and finally last was braunstone, glenfield, new parks etc.

Notice most of the early nationwide FTTC rollout was rural.  The rumours were the reason urban and suburban were late was they were originally going to get FTTP.
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: guest on December 28, 2013, 12:55:27 PM
Going off-topic here but WTH :)

This isn't just about VDSL....

Braunstone & New Parks got ADSL nearly 2 years before Glenfield. Back then ADSL install cost £150 and the cheapest service was £50/month with a 12 month contract. Now if you are seriously trying to tell me that the average council sink estate dweller (remember Braunstone/New Parks still have >40% unemployed) could afford to pay £750 for the first year of ADSL service 13 years ago then I'm afraid we're going to have to agree to differ. Also Sky, Be, TalkTalk (C&W as was) all had much much faster equipment in the exchange several years before BT did anything about it. Again, the sink estates got that first.

The real answer may be something the BTOR guy said - Glenfield is the last of the Leicester "city" exchanges in terms of BTOR organisation. To those wondering WTH I am on about, Glenfield is not in Leicester, its in Leicestershire and apparently the county & city exchanges are run by seperate teams, with Glenfield being the "red headed stepchild" as it ends up having people from county and city working on jobs because it has some properties in Leicester city and some in the county - the exchange is most definitely physically in the county rather than city. However the Glenfield exchange comes under the control of the "city" team.

Anyway the big winner out of all of this is Virgin who have been the only option for "superfast" for years. BT made their own bed etc....
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: guest on December 28, 2013, 12:59:36 PM
of course zero FEC is perfectly normal for fast path lines, is your line fast path?

You didn't read the thread before posting did you? Usually best to do that before replying I find  ::)

"He re-ran the test and got one FEC but that was probably one of the kids turning on the light/extractor fan in the bathroom."
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: Chrysalis on December 28, 2013, 07:23:54 PM
I did, want to post something you feel I didnt read?

I did read that one FEC comment, but you havent stated if you on fast path or not, my guess is you on fast path (never heard of a line with that high attainable been interleaved) and there really was no FEC error.  He either seen a CRC and said it was FEC, or he was wondering what to do and pretended he got a FEC error.

I wonder if you had the same guy that attended my property, he also was only interested in FEC, and not interested in much else.

My sister lives in glenfield when I visited her on boxing day she was telling me about her adsl cutting out, the sky splitter was 'before' the dsl filter, guess what? the openreach engineer put it like that saying it has to be in that order.  These guys seem very undertrained.

you got a DS margin of over 20db US margin of over 14db, and I am to believe the line is bad enough to need forward error correction? sorry no, conclusion = clueless engineer sorry.

also make your mind up, one minute you talking about vdsl rollout and the next you not.   The vdsl rollout didnt resemble the adsl rollout.  Plus if I was openreach I also would have prioritised both new parks and beamount leys over glenfield.  As one reason wealthier people are richer is they tighter with their cash.
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: guest on December 30, 2013, 06:38:56 PM
Its interleaved and I don't know where you have dragged the hole called Beaumont Leys from?

Glad you have no input to the process or we'd all be paying for benefits claimants having VDSL2. I guess you work for the council, if you work at all.

Edit - someone from TBB who saw this thread has just told me who you are :lol: I won't be wasting my time with you again. My apologies to mods for the way this thread has gone, was intended to be a "Sky FTTC self-install" thread. Delete/mod what you want, shame it went this way.
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: roseway on December 30, 2013, 08:37:37 PM
Happy new year to both of you.

Leave it there please.
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: kitz on December 30, 2013, 11:36:48 PM
Quote
I wonder if you had the same guy that attended my property, he also was only interested in FEC, and not interested in much else.

I had the same with one of the OR guys, which turned into a disagreement because he insisted CRCs weren't important as they auto-corrected..  He insisted that it was FECs that were the ones to look out for and the important ones indicating something was wrong with the line.   Because Ive heard this several times now from various sources, I really am beginning to think something is going wrong some where with the BToR training on the difference between CRCs and FECs.  He didnt get it that I was on 80/20 and wasnt interleaved therefore I shouldnt be seeing FECs.

TBH rizla I doubt that your line is interleaved if you are syncing at the full 80/20 and seeing latency of 7ms.

That said..   adsl has 2 transmission channels (or paths) FAST (path 0) and INTERLEAVED (path 1).   Interleaving and Error correction are also two separate processes and although error correction is normally switched on at the same time, it is possible to send data down the interleaved channel setting the interleaved value at '1' and error correction switched off..  in effect making the interleaved path the same as fast.   From what Ive seen BT seem to be doing this, leaving the FAST channel for IPTV  type traffic...   its more apparent if it was a BTr customer with BTvision and you could see on their IPprofile... 2Mb of it was sectioned off for IPTV.

My line isnt interleaved yet traffic appears to be going over the interleaved path with a depth of '1' and '0' INP.   Despite this I very occasionally will see the odd FEC recorded.   There is a plausable expanation why this can happen, but just right now I cant recall the details & technology of what makes this happen on the fly & out of the blue.

Anyhows Happy New Year everyone :)
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: Chrysalis on December 31, 2013, 11:26:02 AM
Its interleaved and I don't know where you have dragged the hole called Beaumont Leys from?

Glad you have no input to the process or we'd all be paying for benefits claimants having VDSL2. I guess you work for the council, if you work at all.

Edit - someone from TBB who saw this thread has just told me who you are :lol: I won't be wasting my time with you again. My apologies to mods for the way this thread has gone, was intended to be a "Sky FTTC self-install" thread. Delete/mod what you want, shame it went this way.

oh dear, you have really let your prejudice take over yourself here havent you.

But to satisfy your curiosity.

I dont live on a council estate.
I do work.
I dont work for the council.
I dont have a sense of entitlement over others just because I may have more money than them or because I work.

BT are a business, they rollout where they think they will get best return of their cash, so I think poorer people will spend more on broadband and hence that may be why poor areas get a rollout and suddenly I have a fetish for benefit claimants?  Unlike yourself BT dont care where their customers get their money from.

I will understand if kitz and co moderate my post as its now way off topic.

Back on topic, you could have stated your line was interleaved although that is highly unusual for a line of your length and I would expect very soon for it to revert to fast path if it hasnt already.

But my point remains on engineers looking for FEC errors.
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: NewtronStar on December 31, 2013, 12:38:50 PM
Happy New Year to all kittys  :)

I have been keeping a close eye on my FEC errors this last month and can confirm the high FEC error count impacted my line more than the CRC's, though what I noticed when there is some kind of interference internal & external the FEC's go high so it's a good way of seeing noise on the line for Interleaver's.
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: Chrysalis on December 31, 2013, 12:47:32 PM
Happy new year guys, but I best stay out of this thread from now on seeing as I am useless.
Title: Re: (Not) Smooth as silk on Sky, read on...
Post by: kitz on December 31, 2013, 02:28:11 PM
I am not happy at the way the thread has degenerated.  Those that have been around here long enough should know that theres a certain mentality which I dont like about certain other forums.


I dont like it when things get personal.... and even I could also take it as such since I have a friend who lived in Braunstone who works for the Local Authority.  Ive stayed there several times not even realising it was supposed to be some sort of trash estate because the house was their own and all the friends and neighbours were so nice.  Both she and her hubby (who works in IT) are hardworking honest people who give a lot of their spare time for free helping local kids organising events for them etc.  We should not tar all with the same brush.

Its also not a good time to sing praises of Sky to me...  because atm my daughter is having a down-right appalling time with them.   They have one week to sort it, before I take over and report them to OFCOM because they certainly are not abiding by regulation and the (non)service she has had over the past 6-8 weeks is diabolical.  She works during the day and its cost her a fortune in (mobile) phone calls yet still they do stuff all. 

Im locking this now and suggest that everyone takes a breather whilst I get out the virtual wine and wish EVERYONE all the best for the new year.   :congrats: