High-Density Fiber Testing and Network Diagnostics Solution
Dimi MPO-12 Fiber Loopback Cable provides a loopback signal path between transmitter (TX) and receiver (RX) ports. It is designed for testing, troubleshooting, and validating MPO-based fiber optic networks, transceivers, and high-density switch ports.
This loopback solution supports 40G, 100G, 200G, 400G, and 800G connectivity testing. Each unit is factory-terminated and tested to ensure stable optical performance and high repeatability.
Why Partner with Dimi?
Direct Factory Sourcing: Eliminates intermediaries to provide competitive pricing and optimize your margins.
100% Factory Tested: Every unit undergoes automated optical testing, 3D interferometer geometric validation, and 400x microscopic end-face inspection. A complete test report is enclosed with each order.
Flexible Manufacturing: Capable of handling small custom runs as well as high-volume wholesale distributor orders.
Global Compliance & Traceability: Fully compliant with ISO 9001:2015, RoHS, and REACH standards, with serialized batch tracking for easy international logistics and accountability.
Product Specifications
|
Parameter |
Technical Specification |
|
Product Type |
MPO-12 Fiber Loopback Cable |
|
Connector Type |
MPO (Standard Low-Loss / Premium Elite options available) |
|
Fiber Count |
12 Fibers |
|
Fiber Mode |
Single-mode OS2 / Multimode OM3 / OM4 / OM5 |
|
Connector Gender |
Male (with guide pins) / Female (without pins) |
|
Polarity Configurations |
Type A (Straight-Through) / Type B (Flipped) / Type C / Custom Pinning |
|
Polish Type |
APC (Single-mode) / UPC (Multimode) |
|
Insertion Loss (IL) |
Standard ≤ 0.35dB / Low Loss Elite ≤ 0.25dB |
|
Return Loss (RL) |
Single-mode APC ≥ 60dB / Multimode UPC ≥ 20dB |
|
Fiber Core Type |
G652D / G657A1 / Bend-Insensitive Multimode (BIMF) |
|
Form Factors Supported |
QSFP+, QSFP28, QSFP56, QSFP-DD, OSFP, CFP, CFP2, CFP4 |
|
Jacket Material |
LSZH / PVC / OFNR (Riser Rated) / OFNP (Plenum Rated) |
|
Operating Temperature |
-40°C to +75°C |
|
Standards Compliance |
ISO 90012015 / IEC 61754-7 / TIA-604-5 / RoHS / REACH |
Key Features
Optical Performance
Low insertion loss (IL) and high return loss (RL) ensure stable signal transmission and accurate test data.
Hardware Compatibility
Fully compatible with standard QSFP+, QSFP28, QSFP56, and QSFP-DD/OSFP transceivers, as well as patch panels and switch ports from major networking platforms.
Efficient Diagnostics
Allows quick verification of multi-fiber optical interfaces without the need for additional, complex network links.
Rugged Design
Built with thermally stable components to maintain reliable performance in high-density data center environments.
Typical Applications
Verifies the TX/RX operational status of high-speed modules, including QSFP28, QSFP-DD, and OSFP formats (e.g., 400G DR4/XDR4 modules).
Troubleshoots and baselines MPO trunk cables, cassettes, and patch panels prior to network commissioning.
Performs loopback testing on high-density switches and routers to isolate hardware faults from external cabling issues.
Used in network equipment manufacturing, quality assurance labs, and staging environments for long-term reliability testing.
OEM & Customization Services
As a direct manufacturer, Dimi provides flexible OEM, ODM, and bulk custom solutions for distributors, system integrators, and telecom vendors.
Custom Lengths
Available in standard 0.5m, 1m, 2m, or precise custom lengths tailored to specific rack setups.
Private Labeling
Custom part numbers, barcode/QR code printing, private logo branding, and bespoke packaging options.
Color Coding
Custom outer jacket colors to match your network mapping or architecture standards.
Custom Pinning
Tailored internal fiber mapping based on your technical schematics (e.g., specific Tx-to-Rx looping paths for proprietary hardware testing).
FAQ
Q: What is an MPO-12 Fiber Loopback Cable used for?
A: It is used to test the transmitting (TX) and receiving (RX) capabilities of MPO network hardware. By looping the signal back into the device, engineers can verify port functionality and isolate network faults without deploying a full end-to-end link.
Q: Can these loopback cables be used for 100G, 400G, and 800G networks?
A: Yes. They are optimized for high-bandwidth parallel optics. For 100G (QSFP28) or 400G/800G architectures, they are suitable for testing transceivers that utilize MPO-12 interfaces, such as 400G DR4 modules.
Q: How do I choose between Male and Female connectors?
A: If you plug the loopback directly into an optical transceiver module (e.g., a QSFP28 transceiver), you need a Female connector (without pins). If you plug it into a patch panel, cassette, or trunk cable port, you typically need a Male connector (with pins).
Q: Do you support standard Type A, B, or C polarities?
A: Yes. Type A is straight-through mapping (1-to-1). Type B features a flipped mapping (1-to-12, 2-to-11), which is the industry standard for most QSFP/QSFP28 transceiver diagnostics. Custom pinning matrices are also available upon request.
Q: What is your MOQ and lead time for bulk orders?
A: We offer flexible MOQs for standard configurations to support initial evaluation and lab validation. Standard production lead times range from 3 to 7 business days, depending on order volume and customization requirements.
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