StarTech.com LC Loopback Plug, Single Mode 9/125 Fiber Adapter, LC/UPC Connector Test Optic Tester

Perform loopback testing and verify signal continuity in Single Mode LC fiber networks

This Single Mode LC Loopback Plug is a practical tool for verifying signal continuity, insertion loss, and port function in fiber optic networks. Ideal for technicians and IT Pros, it enables fast, consistent testing across LC/UPC fiber connections.

Test Single Mode Connections

This 9/125um LC Loopback Adapter is compatible with OS1 and OS2 LC/UPC cabling in point-to-point and structured installations. IEC and RoHS compliance ensures readiness for standardized deployments and testing in regulated environments.

Accurate Signal Diagnostics

Validate transceivers, isolate faults, and confirm port function across single mode LC switches and SFP/SFP+ devices. The 0dB low-loss design and high-precision ceramic ferrules deliver clean signaling for accurate, reliable diagnostics.

For Enterprise Fiber Switches

The streamlined LC connector fits securely into high-density fiber arrays without blocking adjacent ports. A durable ABS housing withstands wear from repeated use and is suitable for frequent testing in data centers and edge or on-prem installations.