=== 9^SET/LOCKOUT <call>^Stop a callsign connecting to the cluster
=== 9^UNSET/LOCKOUT <call>^Allow a callsign to connect to the cluster
=== 9^SET/LOCKOUT <call>^Stop a callsign connecting to the cluster
=== 9^UNSET/LOCKOUT <call>^Allow a callsign to connect to the cluster