CONTENTS

 1     Scope
 2     References
        2.1     Normative references
        2.2     Informative references
 3     Terms and definitions
 4     Abbreviations
 5     Characteristics of the optical fibres and cables
        5.1     Optical fibre characteristics
                 5.1.1      Transmission characteristics
                  5.1.2     Fibre microbending
                  5.1.3     Fibre macrobending
        5.2     Mechanical characteristics
                  5.2.1     Bending
                  5.2.2     Tensile strength
                  5.2.3     Crush and impact
                  5.2.4     Torsion
        5.3     Environmental conditions
                  5.3.1     Hydrogen gas
                  5.3.2     Moisture permeation
                  5.3.3     Water penetration
                  5.3.4     Lightning
                  5.3.5     Biotic damage
                  5.3.6     Vibration
                  5.3.7     Temperature variations
                  5.3.8     Chemical attack
                  5.3.9     Mechanical aggression
        5.4     Installation and removal
                  5.4.1     Installation method
                  5.4.2     Removal method
 6     Cable construction
        6.1     Fibre coatings
                  6.1.1     Primary coating
                  6.1.2     Secondary coating
                  6.1.3     Fibre identification
                  6.1.4     Removability of coating
        6.2     Cable element
                  6.2.1     Optical fibre ribbon
                  6.2.2     Slotted core
                  6.2.3     Tube
                  6.2.4     Strength member
                  6.2.5     Water-blocking materials
                  6.2.6     Pneumatic resistance
        6.3     Sheath
        6.4     Armour
        6.5     Identification of cable
 7     Test methods
        7.1     Test methods for cable element
                 7.1.1      Tests applicable to optical fibres
                 7.1.2      Tests applicable to tubes
                  7.1.3     Tests applicable to ribbons
        7.2     Test methods for mechanical characteristics of the cable
                  7.2.1     Tensile strength
                  7.2.2     Bending
                  7.2.3     Bending under tension (flexing)
                  7.2.4     Crush
                  7.2.5     Squeezing (abrasion resistance)
                  7.2.6     Torsion
                  7.2.7     Impact
                  7.2.8     Kink
                  7.2.9     Repeated bending
                 7.2.10     Coiling performance
        7.3     Test methods for environmental characteristics
                  7.3.1     Temperature cycling
                  7.3.2     Longitudinal water penetration
                  7.3.3     Moisture barrier
                  7.3.4     Freezing
                  7.3.5     Hydrogen
                  7.3.6     Nuclear radiation
                  7.3.7     Vibration
                 7.3.8      Ageing
                  7.3.9     Pneumatic resistance
                 7.3.10    Lightning
Appendix I – Direct buried optical fibre cables: the Brazilian experience
        I.1        Introduction
        I.2        Requirements
                  I.2.1     Resistance to traction
                  I.2.2     Resistance to moisture penetration
                  I.2.3     Resistance to abrasion
                  I.2.4     Resistance to chemical attack
                  I.2.5     Resistance to temperature variations
                  I.2.6     Resistance to biological aggressions
                  I.2.7     Resistance to other mechanical aggressions
                  I.2.8     Cable removal and reinstallation
        I.3        Product design and construction
                  I.3.1     Double polyethylene-plus-nylon jacket optical cable for direct buried installation
                  I.3.2     Direct buried underground in-duct-protected optical cable