1 Scope
2 References
3 Definitions
3.1 Terms defined
elsewhere
5 Conventions
6 Basic configurations for telecommunication equipment
6.1 Basic functional configurations (classification of function
blocks regarding effect on client signal)
6.2 Equipment configuration (components, circuit packs and unit)
6.3 Functional configurations to be considered for countermeasures
7 Reliability requirements relating to soft errors and procedure of equipment
design with mitigation measures
7.1 Reliability requirements
7.2 Equipment development procedures to implement mitigation
measures
8 Estimation of soft error impact
8.1 Devices impacted by soft errors
8.2 Estimation method for soft error failure rate (SEFR)
9 Methods for implementation of soft error measures
9.1 Principles of mitigation measures
9.2 Soft error detection method
9.3 Soft error correction method
9.4 Example of soft error correction measures for setting data
storage memory
9.5 Examples of soft error correction measures for operational
control memory and logic circuits
9.6 Example of soft error measures for buffer memory
9.7 Definition and consideration of silent failure
10 Notes on application of soft error measures
10.1 Soft error measures for a redundant configuration function
block
10.2 Design method of notification message regarding soft error measures
10.3 Saving soft error occurrence history
10.4 Soft error measures for initial start-up data storage memory
10.5 Identification of physical fault failure to prevent repetition
of soft error measures
10.6 Notes on use of CPU internal memory
11 Soft error reliability evaluation methods
Annex A – Design method of notification message for soft error measures
A.1 Notification message on
execution of automatic restoration from soft error
A.2 Notification
message on execution of manual restoration from soft error
Appendix I – Trends in semiconductor device soft error tolerances
Bibliography