This tip is designed for increased BROADBAND speed in Windows XP, but it should work for 56k modems too.
Note: You might also want to read the Increase Broadband Connection Speed in Windows XP/2003 tip for more info.
QoS Packet Scheduler is a method of network bandwidth management that can monitor the importance of data packets and depending upon the priority of the packet, give it higher or lower priority or bandwidth levels. It’s not very useful unless you’re using apps which are QoS-aware or running a server, so you can gain some network overhead back by turning it off.
Note: This following tip will not work on XP Home Edition.
Effect is immediate on some systems, some need to re-boot.