Loopback

C-LIGHT Loopback is a critical testing and protection mechanism in optical networks, enabling signal quality verification, fault localization, and service recovery by redirecting signals from the transmitter back to the receiver. Core modes include local (device-level), remote (link-level), and protocol (data-layer) loopback, supporting rapid diagnostics for optical modules, OTN/SDH equipment, and Ethernet ports. Key strengths lie in non-intrusive detection, millisecond-level fault isolation, and multi-layer coordination, ideal for 5G fronthaul and data center interconnects. Advancements focus on automated intelligent loopback, AI-driven anomaly analysis, and integration with protection systems (e.g., OLP) to enhance self-healing capabilities and operational efficiency.