VISTA Plus for MPE Administrator's Guide

Chapter 2
2-20
time_out_margin This number plus the time_out number specifies the maximum time
interval of inactivity allowed before a VISTA Plus client/server
connection is terminated. For example, if time_out was set to 5 and this
number was set to 2, the server will terminate the client connection if
there is no client activity for 7 minutes. Client inactivity can result from
a GPF error, client power off, or other system error. If the time_out
number is 0, the time_out_margin number is not used.