This controls where alarms generated by this node are sent, none, the Control Port Terminal, CTP, the configured printer destination, PRIN, or any combination of these specified by summing the option values. An admin managing a remote unattended site typically routes alarms to PRIN rather than CTP, since nobody is normally connected to the control terminal to see a real-time alarm; the summing scheme lets both destinations be active simultaneously if the site does have occasional live console monitoring too. For example, setting this to a combined CTP+PRIN value would ensure alarms appear both on any connected control terminal session and get printed to the alarm printer, covering both an attended and unattended scenario.