An alternative way to connect two computers is through a leased line, which is a permanent connection between two devices. Leased lines provide faster throughput and better quality connections, but they are also more expensive.

Also see Dial-Up Modem Standards in the Quick Reference section of Webopedia.

Al's Winsock Tuning FAQ 
FAQ by Albert P. Belle Isle that describes how to tune Winsock for maximum performance.

Windows 95 Dial-up Network Throughput
Tips on how to configure the Windows 95 Registry for optimal dial-up performance.