NEC 2000 IPS manual Reliability and Availability, Mean Time Between Failures Mtbf, Mtbf Mttr

Chapter 3 System Highlights

Reliability and Availability

Mean Time Between Failures (MTBF)

The MTBF represents the minimum time frame in which a failure of any common equipment --such as processors, memory, switching, and etc. - may cause a partial system outage. The following table shows the MTBF in hours and in years for each card and terminal.

Reliability and Availability Chart

			Reliability
Description						Availability
	Fit	MTBF		MTBF	MTTR
		years		Minute	Minute
ICS VS PIMMJ (BWB)	1868	61.1		32136156	60	99.999813%
SPN-CP24A MP	11849	9.63		5064995	45	99.999112%
SPN-CP24B MP	10798	10.6		5575176	45	99.999193%
SPN-CP31A MP	10700	10.7		5627772	45	99.999200%
PN-CP27A MP	10798	10.6		5575176	0.3	99.999995%
SPN-CP15 FP	3060	37		19460520	5	99.999974%
PZ-M606-A	1269.2	89.94		47304842	10	99.999979%
PZ-PW121	13850	8.2		4312872	5	99.999884%
PZ-PW122	5780	19.8		10414008	10	99.999904%
PZ-PW131	13350	8.6		4523256	15	99.999668%
PN-8LCAA	1934	59		31031640	5	99.999984%
PN-8COTS	3312	34.5		19092348	5	99.999974%
PN-4DATC	5490	20.79		10934708	5	99.999954%
PZ-8PFTB	1439	79.3		41708628	5	99.999988%
PN-CFTB	941	121		63641160	5	99.999992%
PN-CFTC (AP)	6000	19.8		10414008	5	99.999952%
PN-IPTB-B (AP)	5757	19.83		10429787	5	99.999952%
SPN-4VCTI-B	1435.3	79.54		41834858	5	99.999988%
PN-4LCAA	4467	25.6		13464576	5	99.999963%

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