HP Medical Archive Solution manual Ntp

Services and Components

Table 12: AMS Service Attributes (cont.)

Attribute	Type / Units	Description			C	T	Alarm
Service	Duration	Total duration the service has					N/A
Runtime		functioned since installation; the
		sum of all uptimes.
Restarts	Count	Total number of restarts since					N/A
		installation.
Reference	Text	Indicates the origin of timing					N/A
Clock Source		information; used for audit mes-
		sages, communication, and timing
		functions:
		•	NTP
		•	GPS (not used in the HPMA)
Reference	Enumerated	Indicates the current condition of					TRFS
Clock Status	Text	the timing source:
			0	= Stable
			1	= Flywheeling
			2	= Unstable
			3	= Offline
			4	= Unknown
Local Clock	Enumerated	Indicates the condition of the					TRSS
Status	Text	internal timing system:
			0	= Calibrating
			1	= Synchronizing
			2	= Syntonizing
			3	= Flywheeling
				(Recalibrating)
			4	= Flywheeling
Local Clock	ppm	The error between the local clock					N/A
Rate Error		and the reference clock.
Local Clock	ppm	The cumulative offsets (since last					N/A
Rate Drift		restart) required by the local clock
		to keep in sync with the reference
		clock.
Network	µs	Rough measure of how different					TNER
Neighbor		this service’s clock is from that of
Drift		the ADC services.

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HP Medical Archive