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StarTech.com LOOPBACKMTP12OS2SMM MPO-12 Single-Mode Fiber Loopback Plug OS1/OS2 9/125µm Male

Brand:
StarTech.com
StarTech.com MPO Loopback Plug OS2 9/125 MPO-12
StarTech.com LOOPBACKMTP12OS2SMM MPO-12 Single-Mode Fiber Loopback Plug OS1/OS2 9/125µm Male
€92.06 inc. VAT
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LOOPBACKMTP12OS2SMM
€77.36
€92.06 inc. VAT
Ships from EU stock: 10 item(s)
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Product Code
CR72277
EAN Code
0065030925242
Manufacturer
StarTech.com

Quick Specs

Fiber Type
OS1 / OS2 Single-Mode
Connector
MPO-12 Male
Fiber Size
9/125 µm
Test Durability
1,000 Cycles
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StarTech.com MPO-12 Single-Mode Fiber Loopback Plug

OS1 / OS2MPO-12 Male9/125 µmTAA Compliant

The StarTech.com LOOPBACKMTP12OS2SMM is a single-mode MPO-12 fiber loopback plug designed for testing signal continuity, insertion loss and port function in MPO-based fiber networks. It uses a male MPO-12 connector and is compatible with OS1 and OS2 9/125 µm fiber installations, including point-to-point and structured cabling environments.

Compatibility — check before buying:
This is a male MPO-12 single-mode loopback test plug for female MPO/MTP ports. It is a diagnostic accessory rather than a normal fiber patch cable. Confirm that the equipment under test uses a compatible female MPO/MTP interface and OS1/OS2 single-mode fiber.

Best For

✓ MPO-12 fiber continuity testing
✓ QSFP transceiver diagnostics
✓ Data-centre troubleshooting
✓ OS1 and OS2 single-mode networks

Key Features

 
Single-mode MPO-12 testing
The fixed 12-fiber configuration is designed to create a loopback connection for testing MPO-based single-mode links and compatible transceiver ports.
 
Precision signal diagnostics
StarTech.com specifies insertion loss below 0.35 dB, repeatability within 0.2 dB and return loss above 50 dB for consistent diagnostic testing.
 
Built for repeated use
The loopback plug is rated for 1,000 testing cycles and uses precision ceramic ferrules inside a compact ABS housing.
 
Compact field-ready design
The compact black-and-green ABS housing is suited to technician toolkits and includes a protective dust cap for the fiber interface.

Technical Specifications

Identification
Brand StarTech.com
Part Number LOOPBACKMTP12OS2SMM
EAN / GTIN 0065030925242
Product Type Fiber loopback test plug
Fiber & Connector
Fiber Classification OS1 / OS2 single-mode
Fiber Size 9/125 µm
Connector MPO-12 male
Fiber Count 12 fibers
Industry Standard IEC 61754-20
Performance
Insertion Loss Below 0.35 dB
Repeatability Within 0.2 dB
Return Loss Above 50 dB
Insertion Rating 1,000 testing cycles
Physical Specifications
Material ABS
Colour Black & Green
Dimensions 130 × 11.8 × 9.4 mm
Weight 4 g
Environmental & Compliance
Operating Temperature -40 °C to 75 °C
Storage Temperature -40 °C to 75 °C
Compliance TAA, RoHS, IEC
Package Contents & Warranty
Included 1 × MTP/MPO fiber loopback plug, male
Manufacturer Warranty 1 year

Frequently Asked Questions

What is this loopback plug used for?
It is used to verify signal continuity, insertion loss and port operation by returning the transmitted optical signal through the MPO interface during diagnostic testing.
Is it compatible with OS2 fiber?
Yes. StarTech.com specifies compatibility with both OS1 and OS2 single-mode 9/125 µm fiber installations.
Can it be used to test QSFP transceivers?
Yes, when the transceiver and port use a compatible female MPO/MTP interface. StarTech.com specifically lists QSFP transceiver validation among the intended diagnostic uses.
Is this a normal MPO patch cable?
No. It is a loopback test adapter with a fixed 12-fiber internal configuration, intended for diagnostics rather than carrying traffic between two separate devices.
Singular Expert Insight
The key detail with LOOPBACKMTP12OS2SMM is that it is a diagnostic loopback device, not an ordinary MPO cable or coupler. Its male MPO-12 interface is designed to plug directly into a compatible female MPO/MTP port and return the optical channels internally. That makes it useful for isolating port and transceiver problems without connecting a second endpoint. For accurate results, confirm both the single-mode OS1/OS2 fiber type and the connector gender before ordering.

Buyer’s Guide

Buy it if

You need a reusable MPO-12 male loopback tester for OS1/OS2 single-mode fiber, QSFP diagnostics or structured-fiber troubleshooting.

Skip it if

You need a normal MPO patch cable, multimode fiber, a female loopback interface or a connector type other than MPO-12.

Check first

Verify that the equipment under test has a compatible female MPO/MTP single-mode interface and that an MPO-12 loopback configuration is appropriate for the test procedure.

Features - StarTech.com - LOOPBACKMTP12OS2SMM

Colour
green
More Details
Product Code
CR72277
EAN Code
0065030925242
Manufacturer
StarTech.com
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