NCP optical cable commissioning

The NCP optical cable commissioning involves testing, activating, and validating the submarine fiber-optic system to ensure full operational capacity across its trans-Pacific route.Overview of the NCP Cable SystemThe New Cross Pacific (NCP) Cable System is a 13,000 km high-capacity submarine fiber-optic network connecting the United States with major Asian landing points in China, Japan, South Korea, and Taiwan. It consists of seven fiber pairs and initially deploys 100 Gbps DWDM technology, with a total design capacity of 70 Tbps. The U.S. landing station is in Pacific City, Oregon, operated by Microsoft, while Asian landings include Chongming, Lingang, Nanhui (China), Busan (South Korea), Toucheng (Taiwan), and Maruyama (Japan) .Commissioning ProcessCommissioning a submarine optical cable like NCP typically involves several key stages: 1. Pre-Commissioning Checks Before activation, the cable and associated equipment at landing stations are inspected. This includes verifying fiber integrity, connector quality, and optical amplifiers along the route. The submarine repeaters and branching units are also checked for proper installation. 2. Optical Testing Engineers perform optical time-domain reflectometry (OTDR) and insertion loss measurements to ensure the fiber pairs meet design specifications. DWDM channels are tested individually to confirm signal quality, attenuation, and dispersion characteristics. 3. System Integration The cable is integrated with terminal equipment at each landing station. This includes transponders, multiplexers, and network management systems. The system is configured to support the intended wavelength channels and capacity allocations. 4. Trial Traffic and Performance Validation Commissioning involves sending test data traffic across the cable to validate latency, throughput, and error rates. Any anomalies are corrected before commercial service. For NCP, this would include verifying bulk capacity delivery to consortium members and ensuring non-common carrier operational compliance . 5. Commercial Service Activation Once all tests are successful, the cable is declared ready for service. For NCP, the Japan-US segment entered commercial service on February 22, 2018, and the full system was operational by January 2019, after completing delayed segments to Shanghai, China .Post-Commissioning OperationsAfter commissioning, the NCP system is monitored continuously using network management systems to detect faults, monitor optical performance, and schedule maintenance. The consortium members share operational responsibilities, and IRUs (Indefeasible Rights of Use) are allocated for bulk capacity usage .Key ConsiderationsDWDM Technology: Ensures multiple 100 Gbps channels per fiber pair.Redundancy and Reliability: Repeaters and branching units are tested for failover scenarios.Regulatory Compliance: Each landing station must meet local telecommunications regulations.Consortium Coordination: Multiple operators coordinate commissioning schedules and capacity allocation. In summary, NCP optical cable commissioning is a structured process of testing, validating, and activating the submarine fiber-optic system, ensuring it meets design specifications and is ready for high-capacity trans-Pacific data transmission .