The MTP/LC Loopback Module (P/N 776-00070-00-3199-10) is a diagnostic instrument that loops optical signals from transmitter to receiver within a single connection, enabling direct validation of transceiver port functionality and network link integrity. By returning the transmitted signal to the receiver path, this module provides immediate verification of optical transceiver performance and facilitates systematic troubleshooting of network installations without requiring external test equipment or live traffic.
Technical Specifications
• Part Number: 776-00070-00-3199-10
• Connector Interface: MTP/LC—bridges Multi-Fiber Termination Push-on connectors (designed for high-density parallel optics) with Lucent Connector small form-factor fiber optic interfaces
• Insertion Loss (MT Elite® ferrules): Maximum 0.35 dB (single-mode and multimode)
• Insertion Loss (standard MTP/MPO): Typical 0.1 to 0.15 dB (single-mode and multimode)
• Fiber Count Options: 8, 12, or 24 fibers (configuration depends on transceiver type)
– Key Features
• Internal signal looping eliminates need for external test sets during initial validation
• Supports both single-mode (SM) and multimode (MM) fiber applications
• Multimode grades include OM1, OM2, OM3, and OM4 compatibility
• Low insertion loss performance across standard and elite ferrule grades
• Direct transceiver port testing without live network impact
– Typical Applications
• Transceiver functionality verification in 40G and 100G parallel optics networks
• Installation validation and acceptance testing
• Network troubleshooting and diagnostic procedures
• High-density data center cabling infrastructure testing
• Upgrade path validation (40GbE to 4×10GbE, 100GbE to 4×25GbE)
– Compatibility & Integration
This loopback module is designed for MTP/MPO transceiver ports commonly found in parallel optics implementations. Port configuration (8, 12, or 24 fibers) must match the specific transceiver type under test to ensure proper signal coupling and measurement accuracy.
