Rec. ITU-T G.911 (03/1993) � PARAMETERS AND CALCULATION METHODOLOGIES FOR RELIABILITY AND AVAILABILITY OF FIBRE OPTIC SYSTEMS
FOREWORD
CONTENTS
1 Introduction
2 Parameters related to reliability and availability of fibre optic systems
    2.1 Fibre optic system availability and maintenance reliability-related parameters
    2.2 Active optical device reliability parameters
    2.3 Passive optical device reliability parameters
    2.4 Optical fibre and cable reliability parameters
3 Definitions
4 Steady-state reliability prediction method of devices, units and fibre optic systems in serial configuration
    4.1 Purpose and scope
    4.2 Applications of the predicted failure rate method
    4.3 Guidelines
    4.4 Steady-state failure rate prediction method
5 Calculation methodologies for fibre optic system devices, units and systems in serial configuration ...
    5.1 Plug-in circuit pack MTBF
    5.2 System MTBF (terminal and repeater)
    5.3 Frequency of scheduled maintenance actions
    5.4 Random failure rate
    5.5 Infant mortality factor
6 Calculation methodology of availability and maintenance parameters of fibre optic systems with line protection
    6.1 General considerations � Line protection and network protection
    6.2 State-space methodology to determine availability and maintenance parameters in fibre optic systems ...
    6.3 Options of fibre systems with line protection
7 Reference circuits for end-to-end channel availability of line systems on optical fibres
8 Allocation methodology for end-to-end unavailability objectives
    8.1 Contributors to unavailability � Considerations regarding SDH and PDH systems on optical fibres
    8.2 Allocation methodology
Annex A � Determination of unit steady-state failure rate � Example
A.1 Unit description (example)
A.2 Reliability parameters of devices (example)
A.3 Unit steady-state failure rate (FITs)
Annex B � Study case channel availability for a 4 x 140 Mbit/s repeater link on optical fibres with ...
B.1 Description
B.2 Results � Unavailability (minutes/year) per 140 Mbit/s channel
Annex C � Study case � Channel availability for a point-to-point fibre connection in the local network ...
C.1 Description
C.2 Results