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有興趣的可以看看. 1
Description of Equipment
This Mean-Time-Between-Failure Prediction has been performed for the Telecommunications System. This
equipment consists of a System chassis with plug-in circuit board modules. Each sub-level unit includes it’s
associated circuit boards, enclosures, and cables. The following describes the equipment with it’s components.
Assembly Part Number
CE3
FE1
ENET 6U
T1 PKT
OC3 SMF
OC3 MMF
ATM DS3
DS3 PKT
ETH-3U
DC Power Supply
AC Power Supply
Assumptions and Conditions
This calculation relates to operational hours, as opposed to elapsed hours, so this should be reflected in the overall
reliability if required.
Models provided by the Telcordia (Bellcore) TR332, Issue 6, “Reliability Prediction Procedure for Electronic
Equipment” specification and manufacturer’s failure rate data, when available, was used.
Ambient temperature = 25 oC
Environment = Ground Benign, Controlled (GB)
Model = Serial. Redundant paths do not exist.
Bellcore TR-332, Issue 6, Calculation Method = Limited Stress, Method I, Case 3
Component Quality Level = II
Temperature rise of components - See Appendix B.
Electrical Stress - See Appendix B.
Omitted Items
Device Reason for omission
Assembly hardware Stationary mechanical devices are omitted |
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发表于 2008-1-9 15:55:55
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