Modem Booster 8
This program works with all dial-up networking ISPs and optimizes your Internet connection settings to increase your modem speed.
It analyzes and informs you of the exact speed increase that you can expect.
It does a thorough check up of your modem settings and systematically tunes them up by matching your ISP's settings to your connection settings.
There are auto-tune options for inexperienced users, and advanced users can manually tweak the MTU, RWIN, TTL and cache settings.