The EXFO FG-720-023L is a stand-alone remote Optical Time Domain Reflectometer engineered for continuous monitoring and fault detection across dual-wavelength optical fiber networks. Operating at 1310 nm and 1550 nm, this Fiber Guardian unit delivers 45 dB dynamic range at 1310 nm and 43 dB at 1550 nm (based on 3-minute average, 20 µs pulse width). The system supports four distinct testing modes: manual unplanned tests, on-demand testing triggered by fault conditions, scheduled testing at user-defined intervals, and 24/7 monitoring that captures fault-related events only.
## Technical Specifications
• **Model:** FG-720-023L
• **Wavelengths:** 1310 nm, 1550 nm
• **Dynamic Range:** 45 dB @ 1310 nm; 43 dB @ 1550 nm (3-minute average, 20 µs pulse width; NZDSF G.655 fiber: 43 dB @ 1550 nm)
• **Operating Temperature:** 0 °C to 50 °C
• **Scan Resolution:** 1 m
• **Data Storage:** 80 GB local capacity with RAID protection
• **Physical Dimensions:** 44 mm H × 427 mm W × 312 mm D
• **Weight:** 13 kg
• **Certifications:** CE, CSA-UL, RoHS
## Key Features
• SMS-triggered test-on-demand and SMS alerting for fault conditions
• Peak-level monitoring with degradation measurement capability
• Learning function optimizes fault-detection thresholds; season-change management
• Multitasking test architecture supports multiple concurrent users
• Dry-contact relay for subsystem fault indication with battery backup during power loss
• Auto-discovery and auto-provisioning functions
• LAN notification agent delivers alerts to any networked PC
## Typical Applications
• Proactive optical fiber plant monitoring and characterization
• Unplanned fault detection and rapid incident response
• Long-term network degradation tracking via scheduled and continuous testing
• Remote site deployment with autonomous alarm management
## Compatibility & Integration
The FG-720-023L integrates into EXFO’s NQMSfiber centralized platform, scaling without unit modification. NQMSfiber provides network operations, alarm management, reporting, trouble-ticket workflow, and status visualization.
