Thanks for the reply. It is being suggested that the fault lies with my computer software now.
Is there anything I can do to change the speed or is it best left alone?
It's best left alone.
As MrSaffron says, the system has automatically raised the noise margin by 3dB because of some noise bursts or other instability. Possibly a thunderstorm?
If things are stable for 10-14 days, then it may reduce that noise margin by 3dB again, and you will get your speed back.
You may or may not know that a connection made well within daylight hours tends to be faster that any other time. So a single reconnection may get you to 1152kbps. But don't do several as that will be taken as instability and restart that 10-14 day wait. As long as the new connection is 864kbps or higher you will still get the .75 IP Profile.
If you do luckily get 1152kbps or more, in four or five days from that I would expect the IP Profile to rise to 1Mbps, which is probably what it was before.
Anything higher than 1152kbps but lower than 1440kbps doesn't give you any extra speed or a higher IP profile, so in fact 1152kbps is your optimum sync. The higher the sync the more errors there are, so the higher the chance of the DLM system upping the noise margin again.
I've a few pages about the subject on my website - see my sig. DLM, Noise margin and BT IP Profiles >> Old BT Wholesale are the ones. Also have a browse through my Troubleshooting section, in particular the Ring/Bell Wire and Miscellaneous Nasties pages. You might find something that you can do to improve the stability and speed of your line.
My broadband basic info/help site - www.robertos.me.uk
Domains,website and mail hosting - Tsohost
. Connection - Plusnet
Extra Fibre (FTTC). Sync ~ 56.0/13.9Mbps @ 600m.
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