YD/T 5018-2023
Submarine optical cable engineering technical specifications (English Version)
- Standard No.
- YD/T 5018-2023
- Language
- Chinese, Available in English version
- Release Date
- 2023
- Published By
- Professional Standard - Post and Telecommunication CN / YD
- Latest
- YD/T 5018-2023
- Replace
- YD 5018-2005
- Introduction
Analysis of the core standards of submarine cable systems
According to the 2021 industry standard revision plan of the Ministry of Industry and Information Technology, the new version of the specification comprehensively upgrades YD 5018-2005, adds a new acceptance chapter, integrates the technical requirements of the international standard ITU-T G.977.1, and is suitable for cross-border cooperation projects.
System type Composition difference Life cycle Maintenance margin System with repeaters Including submarine repeaters/branching units 25 years Maintenance ≤3 times System without repeaters Without submarine amplification equipment 25 years (line) Loss margin ≤5dB Key technical indicator requirements
Optical fiber performance standards
- Attenuation coefficient: ≤0.16dB/km in deep sea section (G.654.E optical fiber)
- PMD coefficient: ≤0.04ps/√km (systems above 100G)
- Insulation resistance: ≥105MΩ·km (500V test)
Transmission performance indicators
Rate level Bit error rate (BER) Q value requirement 100G ≤1×10-12 EOL+1dB margin 400G ≤2.5×10-6 GSNR≥15dB Key Control Points for Construction
Route Selection Principles
- Avoid anchorage/fishing area, and cross the waterway perpendicularly
- Parallel distance with high-voltage cable ≥1km
- Crossing angle ≥60°, distance from repeater＞3 times water depth
Burial Depth Standard
- Shallow sea section (20-500m): ≥3m (≥5m in high-fault area)
- Deep sea section (＞1000m): surface laying
- Landing section: joint casing protection + 1.5m burial depth
Acceptance test process
List of mandatory test items
Test phase Key items Instrument requirements On-the-job inspection C-OTDR curve, insulation resistance Integrated OTDR Initial acceptance Q value, GSNR, bit error rate Digital transmission analyzer Final acceptance 7-day stability test Network management and monitoring system
Special requirements for open systems
Additional tests required: Generalized signal-to-noise ratio (GSNR), maximum gain deviation (≤3dB), ROADM reconstruction function (spectrum step size ≤6.25GHz)
YD/T 5018-2023 history
- 2023 YD/T 5018-2023 Submarine optical cable engineering technical specifications
YD/T 5018-2023 Submarine optical cable engineering technical specifications has been changed from YD 5018-2005 Engineering Design Specification for Fiber Optic Submarine Cable Transmission System.
