Perle Systems SCS, STS manual Trigger, Clear

Channels

Trigger	If the Trigger Type is Low, an alarm is triggered when the input drops below
	the specified Trigger value; other severity level trigger values must decrease in
	value with each subsequent level. If the Trigger Type is High, an alarm is
	triggered when the input is higher than the specified Trigger value; other
	severity level trigger values must increase in value with each subsequent level.
Clear	To clear an alarm, the input must drop below the specified value when Trigger
	Type is High or go above the specified value when Trigger Type is Low.
Email	When enabled, sends an email alert to an email account(s) set up in the System
	settings when an alarm is triggered or cleared. The email alert data includes the
	severity level and the value that caused the alarm to trigger or clear. The Email
	Alert is associated with Level Critical.
	Default: Disabled
Syslog	When enabled, sends a message to syslog when an alarm is triggered or
	cleared. The syslog entry includes the severity level and the value that caused
	the alarm to trigger or clear. The syslog message is associated with Level
	Critical.
	Default: Disabled
SNMP	When enabled, sends an SNMP trap when an alarm is triggered or cleared. The
	trap consists of the severity level and whether the alarm was triggered or
	cleared.
	Default: Disabled

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