My dialup ISP will occasionally drop me out - even while in the chat room, and it seems often to go in bursts of more than one occurrence, often close together - it seems like some sort of interference. My phone service is now provided not on a copper pair, but on a 'broadband' type link via a microwave style cable.

I was forced to get the 'you have another call coming in' notification permanently removed, as

1) having it installed at all still seemed to send some noise down the line

2) I could not switch it off, other than before EVERY call. When I did have it on my other provider, if I switched it off, I had to switch it back on after every call - so i tended to forget about it anyway...

Any noise on the line may cause the modem to drop out.

Robin