After 30 seconds of inactivity on your wireless device browser, the Internet connection is disconnected and is considered to have "timed out." The browser session will be reinitiated when you make another menu selection, which causes a "sending" or "receiving" message on your screen.
Set waiting period before a terminal system performs some action. [Typical uses include a poll release (when a terminal is disconnected if the time-out period elapses before keying resumes) or an access time-out.
This is the result if a computer or other network device (such as a telephone) waits more than a predetermined amount of time when requesting data from another source. It is usually something like a disconnection.