After the specified time expires, a running ISPF dialog (in a user server address space) receives an error message and must be restarted from the client. z/Server will cancel the user server address space that had encountered the timeout.
When a scheduler address space does not get a timely response from a user server, the following message is issued:
SLR0084E hh:mm:ss.ttt User server [002] did not response for [003] seconds. Connection terminated due to timeout!