I am still in the darkl ages and using a 56k modem on dial up. It usually connect at around 52k (never 56k), but recently it has been connect at 45k and 48k, quite low. I have not changed any setting etc. Any ideas????
When a modem encounters noise, the 56Kbps modem protocols will step down the speed of the connection until they have a speed that they can maintain error free (after accounting for error correction protocols). Even on the cleanest of real world phone lines, connecting and maintaining 50Kbps is a rare thing. In practice, you are doing well to be getting between 45Kbps and 48Kbps.