Hi,

Well we just received a mail from our ISP saying that we are due to move on to ADSL2+ overnight and that we've just been moved on to 21CN kit!

Well maybe I'm a bit daft but surely that's an upgrade and not a downgrade?? We are waiting for more advice from our ISP but any recommendations on what to do next appreciated please. Do we just wait whilst BT test (break?) things?

Presumably we should expect the outcome to be positive?

Thanks again,
Dave

Moving from ADSL to ADSL2+ can create those issues on a long line. Requesting a move to ADSL2 or ADSL may be of benefit. You may even be able to set it on your router to override the exchange setting and control it yourself.

Based on your downstream I think this has happened already (the switch to 21CN), as the upstream limit on old ADSL is 448 and you are connecting at 480 currently according to data you posted.

The switching around between ADSL2+ and ADSL2 modes is not likely to make much difference, as your attenuation is pretty much above the area where most hardware will try and use ADSL2+ mode.

Willing to bet that some instability has led to your target noise margin rising from the default 6dB to 15dB, which would knock a meg or two off your speed. If the line is very stable, then once you are outside the mythical 10 days of training to get ISP to request a target noise margin reset to 9dB or 6dB

Definitely 21CN! IP Profile = 88.2% of Sync!

Could be this strange thing of a G.DMT profile on an WBC connection though, about to be changed to G.992.5.

As has been said, that long phone extension cable is almost certainly really screwing your connection. You need to find a way of eliminating it.

In particular it could be (a) low grade cable, and (b) almost certainly contains a ring wire which will not be filtered. A ring wire can cost over 2Mbps, though I don't think it will be that dramatic in your case. It is often also the cause of disconnections.

Long ethernet cables from the router to the computers are however fine, with a maximum distance of 100 metres.

In reply to a post by InQ:

It would be a good idea to test the router in the test socket on the master socket and post up your router stats here right afterwards.

See this for more info:- http://www.kitz.co.uk/adsl/socket.htm

I forgot to include my agreement with this in my reply to the OP a moment ago, but better to do so here now, rather than edit it.

Hi,

Just posted in another thread but as of this morning the connection is still very poor and at 1/3 of what we had before. ISP does not seem helpful at the moment.

This is a big problem for us as we run a successful web business from our home office. Now we can't do anything efficiently other than simple page downloads.

Not sure what my options are now - the FTTC cabs are in place at the end of the street but the service date keeps going back. Not good.

Dave

Re

ISP response so far seems to be "unlucky mate".

from your post in the other thread, that seems hard to believe. Which ISP is it, and had you contacted them before about the clear problem discussed prior to last night in this thread?

Hi,

Forgive our frustration but please see a copy of my update to our ISP this morning:

Sorry but please try to understand our frustration.

I can only apply logic in suggesting that a) we haven't changed anything - our internal telephone line runs under the stairs and whilst long, has been stable for years. It is unlikely to have degraded. b) we tried a temporary telephone connection i.e. a new roll-up version and got the same result. c) we changed the splitter - same result d) we purchased a new modem - same result.

Thus it seems highly likely that the work BT did at the exchange to "upgrade" to 21CN over the weekend caused our problem? Stuck BRAS profile or whatever?

Not quite sure what else we can try and it does seem a bit unfair to start re-wiring the system that has been stable for years? We've also tried to cover all of the main elements with alternatives and get the same degraded result.

Maybe its a long shot but years back, Pipex put pressure on BT when they tried to pull our connection. This was in the very early days of ADSL. BT reacted positively and did "something" at the exchange which gave us a decent, stable connection. Given the recent change at the exchange, isn't it possible that they "undid" whatever they put right all those years back?

Its pretty clear that we haven't changed anything and we've even tried alternatives to all of our cables and kit. Its even clearer that BT have changed something so surely it must be possible for you to ask them what they did and how it can be rectified?? I agree that if some BT chap turns up and tests then he may well not find anything but given the circumstances, this would be way too superficial and needs a more detailed inspection of what has actually happened. Once that's done and we've got our old service back, then I'll consider re-wiring my house if I think there is need to improve the situation. Up until then, putting the onus on us seems a little unfair?

Thanks for your help,