STARTECH LOOPBACKMTP12OS2SMF MPO/MTP loopback adapter, single-mode, black/green/yellow

STARTECH.com LOOPBACKMTP12OS2SMF MPO/MTP loopback adapter, single-mode, black/green/yellow

The StarTech MPO/MTP loopback adapter is a practical field tool for creating a closed loop and verifying signal continuity, insertion loss and port behaviour on MPO-based fibre optic networks. It is a fibre optic tester with a loopback test type, built around a fixed 12-fibre configuration with precisely aligned ferrules that produce a clean signal for accurate, repeatable diagnostics.

This MPO-12 9/125 µm loopback adapter works with OS1 and OS2 single-mode cabling in point-to-point and structured installations. The female MPO-12 connector mates with male MPO/MTP interfaces that use alignment pins, so you can test high-density links without disturbing adjacent connections. Compliance with IEC and RoHS standards keeps the tool ready for standardised deployments and testing in regulated environments.

Built for repeated use, the adapter combines high-precision ceramic ferrules with a compact ABS housing in black, green and yellow. It is suited to technicians and IT professionals who need quick, consistent testing in data centres, edge or local installations, and it ships with a dust cap.

Key features

• Loopback test adapter for MPO/MTP connections in single-mode fibre networks
• Female MPO-12 connector designed to connect to male MPO/MTP interfaces with alignment pins
• Compatible with OS1 and OS2 single-mode 9/125 µm cabling
• Fixed 12-fibre configuration with precisely aligned ferrules for a clean test signal
• Insertion loss below 0.35 dB, return loss above 50 dB, repeatability within 0.2 dB
• Robust ABS housing in black, green and yellow for repeated testing cycles
• Manufactured in compliance with IEC and RoHS, plus CE and TAA conformity
• No built-in display; a compact tool with a dust cap for field use

Technical specifications

Frequently asked questions

Which fibre type does this loopback adapter support?

It is built for single-mode fibre and is compatible with OS1 and OS2 9/125 µm cabling, making it suitable for point-to-point and structured single-mode installations.

What connector does it use and how does it connect?

The adapter uses a female MPO-12 connector that plugs into male MPO/MTP interfaces with alignment pins, allowing high-density testing without interrupting adjacent connections.

Does it have a display or built-in diagnostics screen?

No. This loopback adapter has no built-in display; it simply closes the loop so you can verify continuity, signal loss and port behaviour with your own test equipment.

What performance can I expect from the tool?

The adapter delivers insertion loss below 0.35 dB and return loss above 50 dB, with repeatability within 0.2 dB for consistent results across repeated test cycles.

Is it suitable for field testing?

Yes. The compact ABS housing is designed for repeated testing cycles, a dust cap is included, and the adapter complies with IEC and RoHS as well as CE and TAA conformity requirements.

It is for you if...

• You troubleshoot or commission single-mode MPO/MTP links in data centres or edge installations
• You need to validate MPO transceivers and isolate faults in parallel high-speed optical links
• You test 12-fibre MPO/MTP and QSFP interfaces and need a repeatable closed loop
• You want a compact, IEC- and RoHS-compliant loopback tool built for repeated field use