I am trying to get back to this issue.
Few months back I have moved my broadband connection from DEMON to BT. Main reason for it was that I was told that my exchange supports ADSL2+ and this technology is much better in supporting poor lines.
Due to a distance from Exchange I am lucky to get any kind of Internet connection using Annex A modulation. I am at work at the moment and can't give you stats but noise levels are high for my line due to distance been 4km+ from exchange.
I have used various line checkers before (before moving over to BT from Demon) and they all were advising that minimum speed on supported ADSL2+ service should be between 1mb and 2.5mb. Some of those calculators have fields to input noise levels for upload and download links. As they all came out very similar (including initial test from BT when I was placing the order), I decided to move from Demon.
After initial switch and 10 days of establishing stable connection my download speed was between 350kb and 450kb. When I checked my router configuration every few days it was staying at Annex A. There was no once try to change to ADSL2+ service.
So when I called BT support I was told that this is the speed that my line can support etc etc. As I work as IT Manager myself and deal with all sort of technical systems I understand this and was trying to convince that person (and few others on the phone after that) that all I want is for BT to set my modulation to ADSL2+ rather then basic ADSL. However after few phone calls I gave up. I was promised that this will be changed or looked at but nothing has been done about it. I got a bit upset but with amount of work piling on just didn't have a heart to chase it.
Well - I have now a bit more time and I am looking for community support admin to help me with my issue. I have read a lot of good staff about you guys and what a great service you provide to our community.
Can you please advise me what do I need to do, to get my line's modulation changed over to ADSL2+. I know it doesn't HAVE to work but until I try I will have this feeling in my mind that I could get double the speed or more.
If your download speed would be 4mb and I would be looking to get to 4.5mb then I wouldn't bother anyone with it. But for me getting extra half a meg is a huge difference and I hope that with your help we can achieve it.
welcome to the forum
before any help/suggestions we need to get more information as will the mods please can you post the adsl stats from your router may need to 'show detail' to get all stats (if hub enter 192.168.1.254 in your browser and navigate to adsl or use a-z, if netgear enter 192.168.0.1) and run btspeedtester (MAC users may have problems) http://speedtester.bt.com or http://bt.custhelp.com/app/answers/detail/a_id/9354/c/346,4740,5520 and post the results .
are you connected directly to the NTE5 master or test socket or to somewhere else? Is the master the only phone socket in your home?
Have you tried the quiet line test? - dial 17070 option 2 - should hear nothing - best done with a corded phone. if cordless phone you may hear a 'dull hum' which is normal
Someone may then be able to offer help/assistance/suggestions to your problem
When you can put your down attenuation figure in this http://www.kitz.co.uk/adsl/max_speed_calc.php (remember the increase of attenuation) this will give a good estimate, I doubt if you have good set up at home already it will double, ADSL2 etc becomes more sensitive and fragile rather than its more robust basic ADSL , also without your stats its hard to advise.
You can always check whether your exchange is actually 21CN enabled here http://www.samknows.com/broadband/exchange_search .
And even if it is/isn't because of being on a long line, you're unlikely to see any real improvements, and it may even be a change for the worst because 21CN can be more aggressive on longer lines.
Here on the forum, we can advise you on products and technniques to enhance the reliability, stability and speed of your IPStream service. This includes CPE that utilises special chipsets to increase the performance of the service.
doing Kidz calculation i get 1632kbps, IP profile 1250
here are my router stats
I am connectyed directly to master socket. I have tried test socket as well (so no internal wiring in a way) and same speed.
I have not tried quiet line test as of yet.
My router stats are in the post above.
if you have other sockets it would be preferable to connect to the test socket while you try and get a better speed. as you say that will eliminate any problems caused by your internal wiring.
with your attenuation of 66/67 if you were upgraded to 21CN assuming your exchange has been upgraded then your attenuation would probably increase by 2db. This will probably give little speed increase if any but will bring a very aggressive system should there be any noise on your line.
connection speed is very short is this due to a manual reset or a hub reset
So looks like due to already hi noise if i move over to ADSL2+ my Downstream Attenuation would go up to 69 which is not supported by any technology ...
thanks for your help on this one. looks like i have to wait for my LPOP to be upgraded to fibre (exchane is already done) so i can get infinity, but this can be years away 😞