Examples

   1.$ SET BROADCAST=(NOMAIL, NOPHONE)
        .
        .
        .
     $ SET BROADCAST=MAIL

     In this example, the first SET BROADCAST command screens out
     all mail and phone messages. Later the second SET BROADCAST
     command restores mail messages. Phone messages are still
     screened.

   2.$ SET BROADCAST=NONE
        .
        .
        .
     $ SET BROADCAST=(SHUTDOWN, URGENT, DCL, OPCOM)

     In this example, the first SET BROADCAST command screens out
     all messages. Later the second SET BROADCAST command restores
     shutdown, urgent, DCL, and OPCOM messages. General, phone,
     mail, queue, and user messages are still screened.