24 Fibers MMC Female Type 1 Fiber Loopback Module, OM4

This 24-fiber OM4 loopback terminates in an MMC female APC connector and uses Type 1 fiber mapping to return transmitted lanes to the receiver. It supports multimode port diagnostics and burn-in without a second active device. The short 250mm assembly incorporates a 100mm fiber loop, G.657.A2 glass and a 2.5mm plenum jacket.

Product Highlights

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

Both fiber mode and fiber count must match the equipment test plan. Type 1 mapping defines the return paths, while the female APC MMC interface must connect to the appropriate pinned APC mate. Keep this module separate from OS2 and 16-fiber versions so a visually similar connector does not lead to an invalid test configuration.

Maximum insertion loss is 0.7dB and minimum return loss is 40dB. The loop's attenuation is part of the optical path seen by the receiver and should be considered before drawing conclusions about a marginal port. Use the module for controlled port checks, then verify the installed channel separately with its actual passive components.

The module is specified for 50 mating cycles. Its loop and overall length have defined mechanical tolerances, but those dimensions do not permit sharp bending or pulling by the cable. Clean the ferrule before use, respect the 7.5mm optical-fiber bend minimum and fit the dust cap immediately after the test.

Reference LPM-OM4-24MMC when requesting the 24-fiber OM4 Type 1 loopback. State quantity and any asset-label needs; for procedures requiring Type 2 or another fiber mode, ask for the customized mapping instead of substituting this model.