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[setecio]

If I switch my adsl modem off every night when i go to bed, can this affect my longterm adsl speed ?
Can this nightly process affect my speed in a negative way by somehow affecting the ISP's and BT's technology that supplies the broadband, and the various profiles or settings that they have for me somewhere in their system ?

[roseway]

No, it shouldn't have any effect, negative or otherwise.

[mr_chris]

Roseway's right... doing that is absolutely fine - if you don't use the modem overnight there's not much point in it being on! So no problem with turning it off at night.

There's a couple of things you might like to know for future reference:

1. BT's DLM technology they use to try and regulate the line stability doesn't like too many resyncs in a short space of time (i.e. disconnecting, turning the modem off and on again). As I said above once a day will not affect this though, but several times per hour will - I don't think anyone outside of BT wholesale knows the actual thresholds though.

2. Some people say that if you get stuck with a slow BRAS profile, then turning your router off overnight for a few days can spur it back into life again... for me the jury's out on that one but it doesn't hurt to try.

Unrelated really to your original question, but it might come in useful

[jazz]

I turn my modem/router off every night and it has caused me no problems at all.  Indeed, when I used to leave it on overnight I had slightly slower speeds than I do now I turn it off.  This seemed to be because of some noise effect which happened quite often about 4 or 5am (some local business or other big user switching things on??).  Now that I turn off each evening my BRAS profile is 500 higher than if I leave it on all the time.  You must beware of turning on and off too frequently in too short a time however in case this is mistaken by the system as a fault on your line.

[setecio]

OK, thanks for that info.

[paul-49]

I never turn the modem off, never had a problem with it, the only annoying thing is the lights on the front of it,

[hake]

Thanks Jazz.  I noticed that effect too.  Its nice to have an observation confirmed.  Speed takes a dive between 1600 and 1700 hours and doesn't recover, no matter how long the router is left on.  Switching the router on at 0800 hours definitely restores the speed which tends to hold up until teatime.   After reading this thread, I am now switch the router off last thing at night. 

[Chris P Duck]

Just a quick point here, on lower quality lines (like mine), if I was to to turn off my router overnight and start it when i came in from work, I would synch at a lower rate than I would than if I started it during the day thus lowering my IP profile.
so for me its beneficial to leave my router on once I have a decent synch speed achived during the day.

[shape]

Sorry to jump in,
                         but I lose sync every night between 4.00 and 6.00, router resyncing from 4 meg to 1meg.
Could I just turn the router off for this time, avoiding the low sync?

[roseway]

It wouldn't do any harm. But there's no guarantee that you'll get a higher connection speed after 6 pm, because it's quite normal for there to be more interference in the evening than in the daytime. Suck it and see, I suggest.

[setecio]

I just realised, that anyone using USB modems, will turn them on and off every time they turn their computers on and off.

[Chris P Duck]

One of the many rasons to ditch your USb modem in favour of a router

[kitz]

>> I just realised, that anyone using USB modems, will turn them on and off every time they turn their computers on and off.

A usb modem when attached ot a PC has a proper shut down request so that the dslam knows its not a loss of signal.  Sorry I cant remember the correct term but something like "last gasp" or dying gasp that occurs during a proper shut down procedure.

[dave.m]

"something like "last gasp" or dying gasp that occurs during a proper shut down procedure."
Kitz, you got it right!
Supports Dying Gasp during orderly shut down of the operation system
from:
http://www.draytek.com/product/adsl_router_modem/vigor318/vigor318.php
dave

[kitz]

Thanks dave.  Yep thats it - couldnt remember off top of my head if it was last gasp or dying gasp
(I was obviously too lazy to google)