For most people 'presence' (status changes) of contacts make up most of the traffic received by their client. However much of the time it is not essential to have highly accurate presence information.
This module automatically cuts down on presence traffic when clients indicate they are inactive (using the CSI protocol).
This is extremely valuable for mobile clients that wish to save battery power while in the background.
Just load the module (e.g. in modules_enabled). There are no configuration options.