General Discussion
  >> BTwholesale DSL Implementation


Register (or login) on our website and you will not see this ad.


Pages in this thread: 1 | 2 | 3 | 4 | 5 | 6 | (show all)   Print Thread
Standard User reddev86
(newbie) Fri 05-Mar-10 01:40:52
Print Post

FTTC distance from cabinet speed deterioration


[link to this post]
 
I know FTTC is still very new, but I can't seem to find any info which correlates distance to the VDSL2 cabinet, and speed attained. I.E a graph. Lots of ADSL graphs about, even ADSL2+, but no VDSL2.

Anyone have any ideas how much VDSL2 speed deteriorates over copper length?

Apparently BT wont accept a FTTC order if the line won't achieve at least 15mbit, but i'd have thought the line from the cabinet would need to be extremely long to not reach that speed.

2x BE Broadband Pro lines
48Mbit down - 5.4Mbit up

Edited by reddev86 (Fri 05-Mar-10 01:42:47)

Standard User bookey
(experienced) Fri 05-Mar-10 09:35:00
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: reddev86] [link to this post]
 
Try this for size. http://www.buckconsult.co.uk/fttx/graphvdsl2.png

BT are really underestimating what people can get.

Ignore the graph above.

BT use Profile 8c from this graph - http://www.buckconsult.co.uk/fttx/BT8cProfilesVDSL2.jpg

Paul

Edited by bookey (Fri 05-Mar-10 12:27:56)

Administrator MrSaffron
(staff) Fri 05-Mar-10 09:38:15
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: bookey] [link to this post]
 
Not sure of original source, but I'd suggest that looks a reasonable graph.

The Openreach estimates seem to be low, though only seen one actual versus estimate to start pestering Openreach over this.

Andrew Ferguson, [email protected]
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.


Register (or login) on our website and you will not see this ad.

Standard User bookey
(experienced) Fri 05-Mar-10 10:00:37
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: MrSaffron] [link to this post]
 
Sorry I don't know the source either, found it while trawling the web ages ago.

Paul
Standard User bookey
(experienced) Fri 05-Mar-10 10:02:42
Print Post

Re: FTTC distance from cabinet speed deterioration *DELETED*


[re: bookey] [link to this post]
 
Post deleted by bookey

Edited by bookey (Fri 05-Mar-10 12:28:21)

Standard User Ignitionnet
(fountain of knowledge) Fri 05-Mar-10 10:09:34
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: MrSaffron] [link to this post]
 
In reply to a post by MrSaffron:
Not sure of original source, but I'd suggest that looks a reasonable graph.

The Openreach estimates seem to be low, though only seen one actual versus estimate to start pestering Openreach over this.


It should be noted that there are several varieties of VDSL2 profiles and BT are using profile 8c which isn't capable of the listed speeds.

Page 5 of this PDF gives a graph specific to this profile.

Stuck on the One Way Internet?
Administrator MrSaffron
(staff) Fri 05-Mar-10 10:46:35
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: Ignitionnet] [link to this post]
 
Ta

Around 32Mbps at 5300 feet, which is around 1.5km (off top of head)

Andrew Ferguson, [email protected]
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User Pgre
(committed) Fri 05-Mar-10 12:05:53
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: Ignitionnet] [link to this post]
 
So this is the reason for the 15Mb Min.. HD TV.
Which may well define where/why BT are deploying in certain areas..

i.e. is there a link between BT Vision Customers and the current deployment plans...

Or am I perpetuating a conspiracy theory.. smile

Regards PGre
Administrator MrSaffron
(staff) Fri 05-Mar-10 12:15:14
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: Pgre] [link to this post]
 
15Mbps HDTV is more down to fitting it onto satellite transponders and getting enough channels so people actually buy HD.

BBC HD is now just about 10Mbps by the way

The lack of contention in the local loop segment will lend itself to a provider having a video cache (e.g. VoD) at the local exchange and people being able to play to their hearts content (well size of wallet)

Andrew Ferguson, [email protected]
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User bookey
(experienced) Fri 05-Mar-10 12:22:38
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: Ignitionnet] [link to this post]
 
Thanks for that, i'll bin my graphs and use page 5!

http://www.buckconsult.co.uk/fttx/BT8cProfilesVDSL2.jpg

Any ideas why BT are not using other profiles?

Paul

Edited by bookey (Fri 05-Mar-10 12:26:54)

Standard User Pgre
(committed) Fri 05-Mar-10 12:25:34
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: bookey] [link to this post]
 
I was just going to ask same question...

in the link.(i.e. pdf doc) . it suggest Europe would be using profile 17a upto 100Mbps and Asia 30a upto 200Mbps... but I guess you start conservatively and see if the infrastructure can take it..

Regards PGre
Standard User Andrue
(knowledge is power) Fri 05-Mar-10 13:17:13
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: Pgre] [link to this post]
 
In reply to a post by Pgre:
So this is the reason for the 15Mb Min.. HD TV.
It's a slightly pessimistic figure though unless it includes headroom for side activities.

I think most Sky HD channels now broadcast 1080i at 12Mb/s with no complaints - pretty sure ITV HD does. BBC HD is currently broadcasting at 10Mb/s although a few of the more picky viewers aren't happy about it.

Luxe HD broadcasts at 5.5Mb/s and is reckoned to be one of the best pictures available. Then again it doesn't have much content and likely benefits from careful post-processing. It wouldn't surprise me if someone monitors the compression frame by frame to tweak it - they can probably afford to spend a week doing that which most broadcasters can't smile

Andrue Cope
Brackley, UK

Just because he can smile

Edited by Andrue (Fri 05-Mar-10 13:30:36)

Administrator MrSaffron
(staff) Fri 05-Mar-10 13:23:27
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: Andrue] [link to this post]
 
With the compression the analysis you suggest is crucial, as is how the material was originally filmed. A program with heavy strobing can really cause problems with poor encoding.

BBC HD is OK but I believe I noticed the difference, but then I encode material too, so know what to look for. BBC HD can afford to spend a bit of time on its compression too for the non-live material.

Now if Sky VoD were to offer higher than usual bit rates it would be a coup

Andrew Ferguson, [email protected]
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User Ignitionnet
(fountain of knowledge) Fri 05-Mar-10 13:27:41
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: bookey] [link to this post]
 
In reply to a post by bookey:
Thanks for that, i'll bin my graphs and use page 5!

http://www.buckconsult.co.uk/fttx/BT8cProfilesVDSL2.jpg

Any ideas why BT are not using other profiles?


Yep, ANFP.

Stuck on the One Way Internet?
Standard User bookey
(experienced) Fri 05-Mar-10 13:29:32
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: Ignitionnet] [link to this post]
 
I must read that one day, when I retire. laugh

Paul
Standard User Andrue
(knowledge is power) Fri 05-Mar-10 13:34:08
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: MrSaffron] [link to this post]
 
In reply to a post by MrSaffron:
BBC HD is OK but I believe I noticed the difference, but then I encode material too, so know what to look for. BBC HD can afford to spend a bit of time on its compression too for the non-live material.
I don't think I have noticed the difference but I don't watch all that much on BBC HD. I'm mostly into documentaries and American imports these days. Last of the Summer Wine will be a good benchmark though and the new series of that is presumably a few months away. Previously that has been hailed as an excellent example (picture-wise at least, granted a lot of people think the show itself is [censored]).
Now if Sky VoD were to offer higher than usual bit rates it would be a coup
Yes. If were given free reign I would implement it as a supplementary tuner and offer an option to restrict downloading to overnight. It wouldn't be VoD but simply avoiding the dreaded 'clash' and not having to play 'shuffle the schedule' with +1 channels would be nice.

Andrue Cope
Brackley, UK

Just because he can smile
Standard User Pgre
(committed) Fri 05-Mar-10 13:34:41
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: Andrue] [link to this post]
 
Yeh.. in the doc (Which it seems is a US Doc) it does go onto say therefore a typical requirement would be 25Mbps per household.. so I guess HD and then some browsing etc..

But 25Mps per household would be a good min for the government to set right smile lol (forget this 2 Mbps min)

Regards PGre
Standard User Andrue
(knowledge is power) Fri 05-Mar-10 13:36:39
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: Pgre] [link to this post]
 
In reply to a post by Pgre:
Yeh.. in the doc (Which it seems is a US Doc) it does go onto say therefore a typical requirement would be 25Mbps per household.. so I guess HD and then some browsing etc..
Unless I've missed it the doc doesn't mention backhaul either. The upgrades needed to support HD VoD are far reaching smile

Andrue Cope
Brackley, UK

Just because he can smile
Standard User Ignitionnet
(fountain of knowledge) Fri 05-Mar-10 13:37:31
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: bookey] [link to this post]
 
In reply to a post by bookey:
I must read that one day, when I retire. laugh


Grief I didn't read the thing, I just kinda know stuff from people who know stuff and google a bit.

Check the PDF and note the downstream transmit power on 8c and how low it is, has to be low to reduce crosstalk with exchange / CO based DSL else you'd have everyone's ADSL sync rates dropping once a VDSL customer went live.

Stuck on the One Way Internet?

Edited by Ignitionnet (Fri 05-Mar-10 13:41:12)

Standard User Pgre
(committed) Fri 05-Mar-10 13:39:35
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: Ignitionnet] [link to this post]
 
Some people have suggested thats happened already in Basingstoke... but as far as I know its still not live.
But maybe there will be some cross talk even with the lower 8c profile powers limits.

Regards PGre
Standard User Pgre
(committed) Fri 05-Mar-10 13:40:42
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: Andrue] [link to this post]
 
Thats where we need Google in the UK offering Gigabit speeds over fibre..
If only...

There is dark fibre out there.. but its obviously too dark to see.

Regards PGre
Standard User Ignitionnet
(fountain of knowledge) Fri 05-Mar-10 13:42:13
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: Pgre] [link to this post]
 
In reply to a post by Pgre:
Some people have suggested thats happened already in Basingstoke... but as far as I know its still not live.
But maybe there will be some cross talk even with the lower 8c profile powers limits.


For sure there will be some, per my previous post 8c will reduce it it's impossible to eliminate it without making VDSL worthless.

Stuck on the One Way Internet?
Standard User Pgre
(committed) Fri 05-Mar-10 14:11:03
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: Ignitionnet] [link to this post]
 
Would the answer be to move as much as possible to VDSL then ?
i.e. will multiple VDSL lines affect other VDSL lines.. or just the ADSL lines.. ?

I guess even if they are affected the effects would be less. Well if its FTTC deployments anyway as the Noise should be less anyway due to reduced length of copper line... Just speculating here of course.

Regards PGre
Administrator MrSaffron
(staff) Fri 05-Mar-10 14:17:30
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: Pgre] [link to this post]
 
Lots of it, but it is getting it that last mile or even few hundred feet to each home.

A neighbourhood with proper utility ducting or paving slabs that are easily lifted to put a fibre down under are one issue, but a UK street with 100+ years of utilities, tree roots etc

Andrew Ferguson, [email protected]
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User bookey
(experienced) Fri 05-Mar-10 15:04:31
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: Ignitionnet] [link to this post]
 
In reply to a post by Ignitionnet:
Grief I didn't read the thing, I just kinda know stuff from people who know stuff and google a bit.

Check the PDF and note the downstream transmit power on 8c and how low it is, has to be low to reduce crosstalk with exchange / CO based DSL else you'd have everyone's ADSL sync rates dropping once a VDSL customer went live.


Logic on that if they removed exchange based ADSL/ 2+
People close to the exchange on VDSL2 line cards or FTTH then BT could use a better profile than 8c?
(Crude idea but you see where I am going)

What worries me now is I know people on the edge of the exchange can get around 3mbit but as more people closer to the exchange have VDSL2 the line rate will drop.
Do we know a estimate as to how much it might drop?

Paul
Standard User Andrue
(knowledge is power) Fri 05-Mar-10 15:18:36
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: MrSaffron] [link to this post]
 
In reply to a post by MrSaffron:
Lots of it, but it is getting it that last mile or even few hundred feet to each home.

A neighbourhood with proper utility ducting or paving slabs that are easily lifted to put a fibre down under are one issue, but a UK street with 100+ years of utilities, tree roots etc
I think Pgre is talking more about backhaul there. I keep hearing that there's loads of dark fibre sitting in the ground all over the country just waiting for tax breaks to make it viable.

Andrue Cope
Brackley, UK

Just because he can smile
Standard User Ignitionnet
(fountain of knowledge) Fri 05-Mar-10 15:44:29
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: bookey] [link to this post]
 
In reply to a post by bookey:
Logic on that if they removed exchange based ADSL/ 2+
People close to the exchange on VDSL2 line cards or FTTH then BT could use a better profile than 8c?
(Crude idea but you see where I am going)

What worries me now is I know people on the edge of the exchange can get around 3mbit but as more people closer to the exchange have VDSL2 the line rate will drop.
Do we know a estimate as to how much it might drop?


Openreach might have some ideas but they've not shared them with the public as far as I know.

Basingstoke will give us some answers I imagine.

Stuck on the One Way Internet?
Standard User Ignitionnet
(fountain of knowledge) Fri 05-Mar-10 15:45:50
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: Pgre] [link to this post]
 
In reply to a post by Pgre:
Would the answer be to move as much as possible to VDSL then ?
i.e. will multiple VDSL lines affect other VDSL lines.. or just the ADSL lines.. ?

I guess even if they are affected the effects would be less. Well if its FTTC deployments anyway as the Noise should be less anyway due to reduced length of copper line... Just speculating here of course.


That answer sadly isn't likely to happen. BT Wholesale, Talk Talk, Sky, etc, have quite a lot invested in equipment in the exchanges and whether or not they'll be happy to get rid of lots of it is anyone's guess.

VDSL will crosstalk with VDSL just as it does ADSL.

Stuck on the One Way Internet?

Edited by Ignitionnet (Fri 05-Mar-10 15:46:16)

Standard User Pgre
(committed) Fri 05-Mar-10 16:16:09
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: Ignitionnet] [link to this post]
 
Yep.. with many in BStoke having long lines already it will be interesting to see what happens.

I am wondering if anythings happened in Luton.. as FTTC is live there .. well at least one member of the Thinkbroadband forum mentioned there were live.

Regards PGre
Administrator MrSaffron
(staff) Fri 05-Mar-10 18:10:53
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: Andrue] [link to this post]
 
Again the where from/to is an issue, no good if a firm has loads of spare dark fibres linking its UK premises if they don't have the interconnect to make them much use.

Andrew Ferguson, [email protected]
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User reddev86
(newbie) Sat 06-Mar-10 16:04:32
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: MrSaffron] [link to this post]
 
The BT line checker must be severely under estimating FTTC speeds then.

I'm around 300m from my cabinet and the checker says 16.3Mbit, I know obviously the line is gonna be longer than that but not THAT much longer......sort it out BT.

2x BE Broadband Pro lines
48Mbit down - 5.4Mbit up
Standard User Ignitionnet
(fountain of knowledge) Sat 06-Mar-10 18:08:23
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: reddev86] [link to this post]
 
In reply to a post by reddev86:
The BT line checker must be severely under estimating FTTC speeds then.

I'm around 300m from my cabinet and the checker says 16.3Mbit, I know obviously the line is gonna be longer than that but not THAT much longer......sort it out BT.


Better to underestimate than have people kicking and screaming because they don't get what they were 'promised'.

Stuck on the One Way Internet?
Standard User Addnan
(newbie) Sat 06-Mar-10 22:41:31
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: reddev86] [link to this post]
 
I am new to all this FTTC stuff. Is a cabinet a big green metal box? Theres one next to my house, less than 100metres away.

What sort of speeds would I be able to get?
Administrator MrSaffron
(staff) Sat 06-Mar-10 23:51:43
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: Addnan] [link to this post]
 
If it is a BT one, then the 40Meg should be possible for you

Andrew Ferguson, [email protected]
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User Addnan
(newbie) Sun 07-Mar-10 08:42:54
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: MrSaffron] [link to this post]
 
In reply to a post by MrSaffron:
If it is a BT one, then the 40Meg should be possible for you


Wow, I am currently geting 8mbs and am more than happy. Have no idea what I would do with that.
Standard User Andrue
(knowledge is power) Sun 07-Mar-10 10:33:10
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: Addnan] [link to this post]
 
In reply to a post by Addnan:
In reply to a post by MrSaffron:
If it is a BT one, then the 40Meg should be possible for you


Wow, I am currently geting 8mbs and am more than happy. Have no idea what I would do with that.
No do most people truth be told. That's part of the problem.

Andrue Cope
Brackley, UK

Just because he can smile
Standard User elwe
(newbie) Sun 07-Mar-10 13:48:12
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: reddev86] [link to this post]
 
In reply to a post by reddev86:
The BT line checker must be severely under estimating FTTC speeds then.

I'm around 300m from my cabinet and the checker says 16.3Mbit, I know obviously the line is gonna be longer than that but not THAT much longer......sort it out BT.


It most certainly is. My cabinet is on the other side of the road, my lines is about 25m max which includes going into the old cabinet and back out again. What does the BT checker think I will get? 27Mb.
Standard User Pgre
(committed) Sun 07-Mar-10 14:46:56
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: Andrue] [link to this post]
 
I'll use it smile
Especially the up speed..
It means (good quality) video conferencing may actually be doable.. whilst still replicating with Lotus notes and browsing the web etc..

Regards PGre
Standard User Ignitionnet
(fountain of knowledge) Sun 07-Mar-10 15:49:17
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: Pgre] [link to this post]
 
In reply to a post by Pgre:
I'll use it smile
Especially the up speed..
It means (good quality) video conferencing may actually be doable.. whilst still replicating with Lotus notes and browsing the web etc..


Yep it's mostly working from home use for me. Video conferencing, remote desktop assistance, moving large files to home, analysing them, returning them to a remote server, etc.

I am dumping Virgin Media 50M precisely due to their failure to provide better upload - it seems likely I'll have FTTC before they upgrade my upstream.

Stuck on the One Way Internet?
Standard User pj500
(newbie) Mon 08-Mar-10 12:57:48
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: reddev86] [link to this post]
 
I asked a BT engineer how far my street cabinet was and he said it was over a mile! This sounds much farther than the norm. I roughly measured the distance, and it is about 1700 metres. Does this mean FTTC will be useless for me with the sharp drop off in speeds?

Can BT put ADSL2+ technology in the street cabinets so that I could get the speeds someone living 1.7 km from their exchange gets with ADSL2+?

At the moment, I get 3mbits on ADSL2+. My exchange is due to get FTTC by summer 2011 (according to the announcement last week).

Cheers,

pj
Standard User Ignitionnet
(fountain of knowledge) Mon 08-Mar-10 13:05:56
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: pj500] [link to this post]
 
In reply to a post by pj500:
Can BT put ADSL2+ technology in the street cabinets so that I could get the speeds someone living 1.7 km from their exchange gets with ADSL2+?


Afraid not, VDSL 2 only from the cabinets at least for now.

Stuck on the One Way Internet?
Standard User tonym
(member) Tue 23-Aug-11 18:18:26
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: Ignitionnet] [link to this post]
 
I have seen some users on Infinity showing in there stats as being on a Profile of 8c

Using the fritzbox 7390 the stats show I and others that I know are on a Profile of 17a.

What is the difference.

tonym
Standard User DougM
(member) Tue 23-Aug-11 18:51:51
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: tonym] [link to this post]
 
Profile 17a is the one recently approved that increases the available bandwidth from 8.5MHz to 17.6MHz, supporting a potential increase in data rates to 80Mbps downstream (based on BT's configuration, subject to the line characteristics).

This may indicate that BT has begun rolling out the update to their VDSL2 cabinets.

Could you post a screen shot of the Overview, DSL and Spectrum tabs from the DSL Information section of the Fritz!Box GUI?

-==-
DougM
Standard User tonym
(member) Tue 23-Aug-11 19:04:05
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: DougM] [link to this post]
 
In reply to a post by DougM:
Profile 17a is the one recently approved that increases the available bandwidth from 8.5MHz to 17.6MHz, supporting a potential increase in data rates to 80Mbps downstream (based on BT's configuration, subject to the line characteristics).

This may indicate that BT has begun rolling out the update to their VDSL2 cabinets.

Could you post a screen shot of the Overview, DSL and Spectrum tabs from the DSL Information section of the Fritz!Box GUI?


At the moment, the home Hub is back on. I was using the new official firmware and snr started dropping from 6 (day time) to 4, and at night from 4 down to 2 which caused a resync. I might go back to the beta firmware which was at least a stable snr.

So at the moment no screenshots, but can give you some stats from a couple of days ago:

This is from the DSL Info:

Max. DSLAM throughput kbit/s 40000 10000
Min. DSLAM throughput kbit/s 20000 5000
Attainable throughput kbit/s 35888 13553
Current throughput kbit/s 35888 9984

Latency 0 ms 0 ms
Bitswap on on
Impulse Noise Protection 0.0 0.0

Signal-to-noise ratio dB 6 11
Line attenuation dB 10 -
Carrier record A43 A43
Profile 17a

FRITZ!Box 198 2 11 542 2 26
DSL central exchange 8 0 0 0 0.14 0

I will let the hub run for a few days and go back to the beta firmware, then if you need any screenshots let me know

tonym
Standard User tonym
(member) Sun 28-Aug-11 13:12:44
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: DougM] [link to this post]
 
In reply to a post by DougM:
Profile 17a is the one recently approved that increases the available bandwidth from 8.5MHz to 17.6MHz, supporting a potential increase in data rates to 80Mbps downstream (based on BT's configuration, subject to the line characteristics).

This may indicate that BT has begun rolling out the update to their VDSL2 cabinets.

Could you post a screen shot of the Overview, DSL and Spectrum tabs from the DSL Information section of the Fritz!Box GUI?


Sorry about the delay , been away for a couple of days.
These are the images of overview/DSL/Spectrum/and Statistics, but show an uptime of just over 40mins(being doing some electrical work).

Overview: http://postimage.org/image/hq83aqxw/
DSL: http://postimage.org/image/hqd1wsf8/
Spectrum: http://postimage.org/image/hqi0itwk/
Statistics: http://postimage.org/image/hqomo7vo/

tonym
Standard User Zarjaz
(knowledge is power) Sun 28-Aug-11 14:34:46
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: tonym] [link to this post]
 
Odd, I have not come across any 17a profile stuff, and in fact if it were, surely you'd be seeing a higher sync rate ?

Standard User tonym
(member) Mon 29-Aug-11 16:02:30
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: Zarjaz] [link to this post]
 
In reply to a post by Zarjaz:
Odd, I have not come across any 17a profile stuff, and in fact if it were, surely you'd be seeing a higher sync rate ?


There is another user who posts on here, but I will leave the name out, who is using a Fitzbox 7390 and is on 17a as well .

My syn started at 38717 with the HH3 and did drop after a month and using the Fritz dropped about another 1000

The other user I mentioned is on a brand new Infinity install with these stats:

Max. DSLAM throughput kbit/s 40000 7200
Min. DSLAM throughput kbit/s 20000 3600
Attainable throughput kbit/s 40104 15124
Current throughput kbit/s 39984 7200

Latency 0 ms 8 ms
Bitswap on on
Impulse Noise Protection 0.0 4.0

Signal-to-noise ratio dB 4 16
Line attenuation dB 5 -
Carrier record A43 A43
Profile 17a

tonym
Standard User RobertoS
(sensei) Mon 29-Aug-11 16:12:50
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: tonym] [link to this post]
 
There is another user who posts on here, but I will leave the name out,
Why leave it out?
who is using a Fitzbox 7390 and is on 17a as well
Or the Fritz box is mis-reporting tongue.

My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost. Internet connection - IDNet Home Starter Fibre. Live BQM.

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
Standard User Zarjaz
(knowledge is power) Mon 29-Aug-11 18:25:13
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: tonym] [link to this post]
 
So you are both using a Fritz box modem/router, and both show 17a ? Surely mis-reported by the Fritz box then ? I have fitted 100's of these circuits, and the only ones that don't show 8a are the 'non configured' ports on the DSLAM.

Standard User tonym
(member) Mon 29-Aug-11 18:40:12
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: RobertoS] [link to this post]
 
In reply to a post by RobertoS:
There is another user who posts on here, but I will leave the name out,
Why leave it out?
who is using a Fitzbox 7390 and is on 17a as well
Or the Fritz box is mis-reporting tongue.


To the first: because he has not posted that information to this forum, that will be up to him to make his name known.

To the second: Maybe the Fritzbox is mis-reporting, all I can tell you is what it shows in the stats.

tonym
Standard User tonym
(member) Mon 29-Aug-11 18:46:12
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: Zarjaz] [link to this post]
 
In reply to a post by Zarjaz:
So you are both using a Fritz box modem/router, and both show 17a ? Surely mis-reported by the Fritz box then ? I have fitted 100's of these circuits, and the only ones that don't show 8a are the 'non configured' ports on the DSLAM.


@Zarjaz , I will bow to your better knowledge of the subject, all I was doing was reporting what the stats said.

tonym
Standard User adslmax
(fountain of knowledge) Mon 29-Aug-11 19:30:44
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: Ignitionnet] [link to this post]
 
In reply to a post by Pgre:
I am dumping Virgin Media 50M precisely due to their failure to provide better upload - it seems likely I'll have FTTC before they upgrade my upstream.


Virgin Media is useless, poor upload and overpriced. Virgin Media should offer 40 Meg instead of 30 Meg and should offer 10 Meg upload instead of 3 Meg upload.to match BT FTTC
Standard User furman
(experienced) Fri 16-Sep-11 16:42:50
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: adslmax] [link to this post]
 
I had Infinity installed about 3 weeks ago. Initial speed was great around 36mb, showing up on the BT installers machine as 39999 and 10000. After a few days it started going down, when the ipprofile was set to 16000 I called BT. After a modem change and anther engineer visit later it is now stuck at 17.

I am approx 1500ft from the cab, should there be a such a big drop? I was expecting 30cm from the estimator but to have about half is a bit frustrating as I am in a 24month contract and I am not getting drastically much more than on adsl.

BT have asked me to monitor for a few days, I did swap my hardware over a few days ago (vigor 2750vn) and then swapped back. My equipment has been plugged in for 3 days but BT are telling me that the connection dropped on my end last night and I have to wait 2 days to give the line time to settle. Bit strange since it has been all fine for 3 days and the 2701HGV-C is reporting 3 days uptime.

---------------------------------------------------------
BT Business Infinity
My Broadband Speed Test
Standard User adslmax
(fountain of knowledge) Sat 17-Sep-11 10:41:29
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: furman] [link to this post]
 
Again, another nasty ip profile from BT. What the point of stupid ip profile on the FTTC ?

plusnetADSL2+13 Meg
Standard User Zadeks
(committed) Sat 17-Sep-11 11:11:53
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: furman] [link to this post]
 
Any idea what your downstream SNR is?
Standard User Zarjaz
(knowledge is power) Sun 18-Sep-11 12:08:27
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: furman] [link to this post]
 
When the engineer replaced the modem, did he ring 'someone' and arrange for a profile reset/recalc ? If not, they should have.

Standard User furman
(experienced) Mon 19-Sep-11 12:58:12
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: Zarjaz] [link to this post]
 
Hi,
I am not sure exactly what the SNR is as I can't see it on the BT Ewire 2701HGV-C. On my old Draytek 2750VN modem/router which I returned it was between 40-60 and upstream was 60-100 if I remember correctly. I may be wrong as I can't check.

The engineer did call to reset the profile and again on the second visit when he ran some tests, reset the profile and showed me the sync speed on his machine.

I tried a speed test yesterday, the sync was 23637 result was 19929 and 10000 result 3962. I checked a short while ago and the speed was same sync but results were 16318 and 3884.

Edit: Should this be in the Fibre forum?

---------------------------------------------------------
BT Business Infinity
My Broadband Speed Test

Edited by furman (Mon 19-Sep-11 13:01:34)

Standard User furman
(experienced) Wed 21-Sep-11 15:46:17
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: furman] [link to this post]
 
I had an engineer visit today, he said he was from the specialist Openreach fibre team.

He was surprised at the wiring and the state of the box and bodged socket installed. He tested and went to the cab, got the ports reset and the line was fine 39999 and 9999 0.4 miles from cab.

He told me that my speed should not drop by half and there must be a fault in the wiring. After speaking to a manager he was told that any work is chargeable to me.

The problem I have with that is if the line was so bad why was in installed?

I spoke on the phone, in the BT forum and web chat and explained that the wiring was not great and 2 lines were coming into an ancient junction box and one line was coming in to an old wall socket. The bodged taped on new Openreach box for the second line was never secured properly when the fibre was installed 4 weeks ago.

Also the engineer mentioned that the outside drop lines look very old and could be causing a problem.

I don't know what to do, could I buy a new junction box and install it? Should BT not have corrected the line and connections first?

---------------------------------------------------------
BT Business Infinity

Edited by furman (Wed 21-Sep-11 15:48:34)

Standard User mr_bean
(member) Thu 29-Sep-11 22:23:40
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: furman] [link to this post]
 
He told me that my speed should not drop by half and there must be a fault in the wiring. After speaking to a manager he was told that any work is chargeable to me.
I can't see how as, with FTTC, any wiring that could really affect sync speed should be the responsibility of Openreach.

The termination point - where your wiring "takes over" is the Ethernet port on the modem and the FTTC faceplate puts all of the house extension wiring behind a filter.
Standard User furman
(experienced) Fri 30-Sep-11 14:51:56
Print Post

Re: FTTC distance from cabinet speed deterioration


[re: mr_bean] [link to this post]
 
An engineer was here a few days ago and said the fault is definitely external as he was getting the same errors after disconnecting the internal wiring and testing just external. Someone was supposed to attend sometime this week but nothing yet.

---------------------------------------------------------
BT Business Infinity
Pages in this thread: 1 | 2 | 3 | 4 | 5 | 6 | (show all)   Print Thread

Jump to