In reply to a post by BatBoy:

Wonder how long that will last, after they introduce IPTV?

won't that be multicast, so little impact on backhaul

edit sp

Edited by ggremlin (Thu 25-Apr-13 20:14:39)

I don't know about "little impact", but multicast is certainly a requirement.

In reply to a post by RobertoS:

In reply to a post by Chrysalis:

that url doesnt work.

It's to a pdf. Could that be an issue for you?

shouldnt be the BT site simply says document does not exist. I will try again.

Actually its noscript thinking its a xss attack, I didnt notice that error the first time round. So is browser side issue.

Edited by Chrysalis (Thu 25-Apr-13 21:41:57)

So going by what you are saying FTTC as it stands will not be able to cope if too many people uses it?

so pay more to go faster, then get a load of people on it and go back to ADSL speeds.

i think I made the right choice, at least the speed i get is constant, most of the time.

In reply to a post by zyborg47:

So going by what you are saying FTTC as it stands will not be able to cope if too many people uses it?

I think not!

While cross-talk may be a growing issue and may be a limiting factor for some lines it will in no way "slow down to ADSL speeds" and FTTC is not "unable to cope".

Vectoring seems capable of delivering speeds of 100Mb/s or so over distances that have never been promised before.

crosstalk is nasty but I dont think you will be back to adsl speeds

I am eg. still 11x higher than my old adsl sync speed (the highest adsl sync speed, it was often lower). and the upstream is over 20x higher than the typical upload speed I had on BTw based adsl.

To be honest what I thought was a drop in speed from crosstalk was in fact was a really nasty problem with the local power supply which is still not resolved.

In 18 months since the cab went live I have seen a loss of max attainable from 86 meg/sec to 82 and OR seem to be very busy over the months hooking people up to the FTTC cab,

Not exactly the end of the world and even the local power supply issue dropped my speed down to 64 meg/sec so in fact VDSL2 can be quite resiliant to problems.

Edited by deleted (Fri 26-Apr-13 20:51:44)

What the others say is about the right emphasis. The impact from crosstalk is a known part of using VDSL2, and is one reason that most early-adopters get speeds *way* above the estimates from BT It looks like those estimates take into account the worst cases of crosstalk.

BT estimates my line to be 55Mbps. When first connected on an 80/20 package, my available speed was around 85Mbps so synced at 80. In the 15 months it has been running, the available speed has slowly dropped to 77, but I'm still sync'ed at 80.

So, VDSL2 will cope as expected, and won't slow down to ADSL2 speeds (unless, of course, you are too far away from the cabinet - a couple of km or more).

Vectoring is, of course, the expected solution. Implementing that should make more people be able to get better speeds - especially in the 300m - 1km range.

By avoiding FTTC you might well save yourself the gradual drop in speed from crosstalk. But you also saved yourself from the basic increase in speed, the extra increase when profile 17a came on stream, definitely lost out on the early-adopter extra-speed-gain.

Unless you're a really borderline case, it isn't even worthy of consideration.

your case compared to mine just shows the variability really.

if lucky crosstalk will have a minimal affect. If unlucky it will have a significant affect, but I would think it to be extremely unlucky and rare for crosstalk to bring a line down to adsl sort of speeds (unless the line already was very poor previously).

so in 18 months you lost 5%
in 4 weeks I lost 40%.

In reply to a post by WWWombat:

What the others say is about the right emphasis. The impact from crosstalk is a known part of using VDSL2, and is one reason that most early-adopters get speeds *way* above the estimates from BT It looks like those estimates take into account the worst cases of crosstalk.

BT estimates my line to be 55Mbps. When first connected on an 80/20 package, my available speed was around 85Mbps so synced at 80. In the 15 months it has been running, the available speed has slowly dropped to 77, but I'm still sync'ed at 80.

Before I cancelled my phone line BT estimated I would get around 45Mbps, but that was before fibre was available here, when it came I did another check, but on house number and post code as i have got rid of my phone line at that time, the estimate was more or less the same. I done a check with my next door neighbours phone number and again more or less the same.

As of yet I have not seen a FTTc connection that runs at the speed it is suppose to. Granted they are still faster than my 10Mbps which I get from my ISp, which is faster than what I used to get with ADSL.

So, VDSL2 will cope as expected, and won't slow down to ADSL2 speeds (unless, of course, you are too far away from the cabinet - a couple of km or more).

Strange then that a mate of mine who is on plusnet and lives around the corner from the cabinet is gett less than half of what he is suppose to get.
Had Bt there and they said there was nothing wrong and his line was reporting 76Mbps. It may be plusnet mind you, with all their traffic management

i think mine is about 500meters from me, mind you depends on what cabinet it comes from.

Vectoring is, of course, the expected solution. Implementing that should make more people be able to get better speeds - especially in the 300m - 1km range.

Knowing Bt they will cut corners and muck it up.

By avoiding FTTC you might well save yourself the gradual drop in speed from crosstalk. But you also saved yourself from the basic increase in speed, the extra increase when profile 17a came on stream, definitely lost out on the early-adopter extra-speed-gain.

Unless you're a really borderline case, it isn't even worthy of consideration.

Not too bothered about really high speed to be honest, I got a reliable 10, seems to be more reliable than my ADSL was and seems to be more reliable than what I have heard about FTTC, no line management or profiling for a start.
I remember Bt profiling on their ADSl service, flipping awful thing it was, which is why I went to ADSL24 and the cable and wireless network.


A few people have asked me why I am not on FTTC, now that it is available, my reasons is that one I am still in a contract for another 14 months at least.
Two, As of yet there are no small ISps that offer FTTC for a decent price with a decent data usage and to be honest, I doubt they ever will be able to.

Three, I would have to pay to have my phone line reconnected

Four, i would be once again at the mercy of bloated toad. (BT)