Customized 16/24 Fibers MMC Fiber Loopback Module

The customized LPM-MMC loopback family covers 16-fiber and 24-fiber MMC modules in OS2 or OM4, with Type 1 or Type 2 mapping. Each uses a female APC MMC interface, a 100mm nominal fiber loop and a 250mm nominal overall length. This configurable approach allows the test module to match the equipment's actual lane map instead of forcing one standard loopback into every procedure.

Product Highlights

• Fiber Type: OS2/OM4
• Fiber Connector: MMC Female, APC
• Glass Fiber: G.657.A2
• Cable Jacket: Plenum (OFNP)
• Fiber Count: 16 Fibers/24 Fibers
• Fiber Mapping: Type 1/Type 2

A useful order specifies fiber count, fiber mode, mapping and connector interface together. Sixteen-fiber and 24-fiber ferrules organize lanes differently, while Type 1 and Type 2 change the return paths. OS2 and OM4 should be selected for the intended test environment. The female APC connector remains non-pinned and requires the correct pinned mate.

Insertion loss is 0.7dB maximum across the family. Return loss is specified at 60dB minimum for 16-fiber versions and 40dB minimum for 24-fiber versions. G.657.A2 glass and a 2.5mm OFNP jacket are used, with 50-cycle mating durability. Confirm the final values on the selected configuration's documentation.

Custom modules should carry clear labels showing fiber count, mode and mapping, not just the MMC name. This prevents accidental cross-use between similar-looking test cords. Inspect the end face before each session, maintain the 7.5mm bend minimum and store every module capped. Loopback testing complements, rather than replaces, end-to-end channel certification.

Use LPM-MMC as the family reference and specify 16 or 24 fibers, OS2 or OM4, and Type 1 or Type 2 mapping. Include quantity and labeling requirements; a port-map excerpt is the most reliable way to confirm the requested loopback.