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I have had similar problems with an ISP at one site - but it may not necessarily be the same as your problem.
I am assuming this is a phone line connected ADSL connection that you have.
The issue is that the ISP has many different settings they can use to control your ADSL line connection at the local exchange.
Some phone lines are very noisy and the signal strength is low, as a result of this the ADSL connection drops out and also a new IP address can often be issued - which can make the reconnection not quite so seamless if you are in the middle of something.
The one my ISP had to change it too was called "Persistent" - if my memory is correct. At the same time they also switched a setting which retained the DHCP IP address for a longer period (even if it did drop out) - I think it may have been 12 hours - otherwise everytime there was a drop out even for a second we could get a new address.
They wont tell you about it generally and half the time even the person answering the call doesn't even know about it. So it makes it difficult to get them to do it.
After much talking I get through to a manager or somebody with some knowledge of their own systems.
They make the adjustment and hey presto - we no longer have drop outs happening all the time
The problem I have found is that these settings have the problem with reverting back to the default settings all the time, so its been a source of constant frustration that we have to call them every 2-4 months to get them to "Fix" the problem that was already 'Fixed' before.
I was using a linux server to provide the PPP sevices (rather than the modem) and so was logging all the drop outs and reconnections - that way we could see exactly what was going on and when and for how long - it was terrible.
Once the settings were changed it was chalk and cheese (drop outs by the minute verses a stable continuous connection for months - and they can do it in the space of a few minutes from their desk. (if you get the right person)
This assumes that this is even the problem - but at least its another thing to try.
Cheers Rally
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