If you are saying your connection speed (sync) changed from 5728 to 5664 then that's a 'resync'!

The IP Profile normally updates VERY quickly when going down though, so it's a bit strange...

There is the odd occassion, where routers change speed, but do not report the sync up the line so to speak, rare, but seen it before.

Sounds most likely. Another is that the old system could at times take 45 minutes to update the reporting of the correct IP profile value, even with a drop.

Agreed - but the OP said the change happened yesterday at 7pm, so normally that would cause the IP Profile to update by now.

Profile updates are only triggered at sync time, so if an update failed for whatever reason it won't change until triggered by another re-sync.

it has now dropped to 4.5mb as i have a netgear dg834g v4 router that i can hack according to this page http://www.kitz.co.uk/routers/dg834GT_targetsnr.htm

as i am only 32kbps of the 5mb profile what value would i enter to drop the snr by - 1db as the table on that site does not give that value

What time of day was it when you connected at 5664? If it was dusk, dawn or night a simple re-sync now should do the trick. You need to avoid several re-syncs in an hour though as the DLM could raise your noise margin and that is a big nuisance. A couple should be OK.

If it doesn't, I'd go for something simple, like 70 or 80%.

Longer term, get RouterStats Lite and monitor how much the noise margin varies. It's worth knowing if there is scope for more, and that will give you a good idea.

In reply to a post by Anonymous:

what value would i enter to drop the snr by - 1db

= 100 * 10 ^ (-1/10) = 79

i did a resync at just after 8am this morning and it resynced back at 5664

i have router stats lite installed i get a noise variation of 0.7db between day and night

after hacking with the the value that XRaySpeX suggested (79 to get -1db) now sync at 5920 with snr at 4.9

is it possible to drop it by -0.5 or is -1 the minimum.?

i would expect the snr to drop to around 3.9 - 4.0 at night with the current figures could this cause any packet loss or latency , hence my asking if i can decrase by -0.5? , many thanks

Try 100 * 10 ^ ( -0.5/10) = 89

I would go for --snr 50, which should give you round about 3dB and probably 6240kbps or a fraction more. That's worth a 5500kbps profile and should be fine given the only small 24-hour variation.