You can use the HALT commands to shut down (deactivate) the network.
Different versions of the HALT command cause varying degrees of disruption to a network. When selecting which HALT command to use, be sure to check your local operating procedure to ensure that you use the appropriate command for your situation.
One reason for being cautious with use of the HALT command is that you could interrupt productive work for everyone using the system. The results of halting VTAM® are similar to disconnecting all phone lines for an office building.