1
Scope
2 References
3 Terms and definitions
3.1 Terms defined in other Recommendations
3.2 Definitions
4 Abbreviations
5 Characteristics and performances
of the system
5.1 Characteristics and performance of
the Digital Line Sections (DLS)
5.1.1 Characteristics of the digital signals at ITI and TI
5.1.2 Overall error performance at TI
5.1.3 System availability at TI
5.1.4 Jitter performance at ITI and TI
5.1.5 Performance allocation between portions of the system
5.1.6 DLS independence
5.2 Optical power budget
5.2.1 Quality factor (Q factor)
5.2.2 Relevant parameters for power budget
5.3 System reliability performance
5.4 System capacity upgradability
6 Characteristics and performance of
the TTE
6.1 General
6.1.1 Definition of reference points of the relevant signals at the ITI, TI,
SEOI and SCOI interfaces
6.2 Transmission performance
6.2.1 Characteristics of the digital signal at TI
6.2.2 Characteristics of the signal at SCOI
6.2.3 Jitter performance at TI
6.3 Actions consequent to an alarm
6.4 Automatic switching
7 Characteristics and performance of
the Optical Submarine Repeaters (OSR)
7.1 Mechanical characteristics
7.1.1 Repeater housing
7.1.2 The internal unit
7.1.3 Corrosion protection
7.1.4 Water pressure resistance
7.1.5 High voltage insulation
7.1.6 Thermal management
7.1.7 Repeater housing sealing
7.1.8 Ambient atmosphere control
7.2 Electrical characteristics
7.2.1 Power modules
7.2.2 Surge protection
7.3 Optical characteristics
7.3.1 OFA design
7.3.2 Relevant parameters
7.3.3 Polarization effects
7.4 Supervisory facilities
7.5 Fault location
7.6 Reliability
8 Characteristics and performance of
the in-line Branching Unit (BU)
8.1 General
8.2 Mechanical characteristics
8.2.1 BU housing
8.2.2 Corrosion protection
8.2.3 Water pressure resistance
8.2.4 High voltage insulation
8.2.5 Thermal management
8.2.6 BU housing sealing
8.2.7 Ambient atmosphere control
8.3 Electrical characteristics
8.3.1 Sea electrode
8.3.2 Power switching
8.3.3 Power modules
8.3.4 Surge protection
8.4 Optical characteristics
8.4.1 Functionalities
8.4.2 Relevant parameters
8.4.3 Polarization effects
8.5 Supervisory facilities
8.6 Fault location
8.7 Reliability
9 Characteristics and performance of
the submarine cable
9.1 Scope
9.2 Transmission characteristics
9.3 Characteristics of fibre in a
submarine cable
9.3.1 General
9.3.2 Fibre loss
9.3.3 Fibre non-linearity
9.3.4 Polarization Mode Dispersion (PMD)
9.3.5 Chromatic dispersion
9.4 Mechanical characteristics and
resistance to the environment
9.4.1 Fibre protection by the cable structure
9.4.2 Fibre mechanical performance
9.4.3 Cable mechanical performance
9.4.4 Cable protection
9.5 Electrical characteristics
Annex A – Implementation of repeatered optical fibre
submarine cable systems using Optical
Fibre Amplifier
A.1 Introduction
A.2 System configuration
A.2.1 Constituents of repeatered optical
fibre submarine cable systems
A.2.2 Transmission configuration
A.2.3 Supervision and remote maintenance of the system
A.2.4 System integration
A.3 System performance
A.3.1 Power budget
A.3.2 Digital line section performance
A.4 System operation
A.4.1 Terminal to terminal communication
A.4.2 Function and characteristics of the power
feeding equipment
A.5 Optical Submarine Repeater (OSR)
and Branching Unit (BU) characteristics
A.5.1 General
A.5.2 OSR (or BU) constituents
A.5.3 Supervisory and monitoring
A.6 Manufacturing
A.6.1 Quality in repeatered optical fibre submarine cable systems
A.6.2 Assembly and loading procedure
A.7 System installation
A.7.1 Submarine route survey
A.7.2 Submarine cable installation
A.7.3 Land cable installation and testing
A.7.4 Terminal station equipment installation and testing
A.8 System commissioning
A.9 Maintenance
A.9.1 Routine maintenance
A.9.2
Maintenance at sea