24f MPO-LC 24fo OM5 50/125 MTP-LC Fan-out 0.9mm 0.3m Optical Fiber Patch Cord

+ MPO to LC / MTP to LC patch cord polarity type:

- Type A (Straight-Through)

The Mapping: Pin 1 on the MPO connector links directly to LC leg 1, Pin 2 to LC leg 2, and so on.

Connector Orientation: Key-Up to Key-Down configuration.

Best Used For: Modular cassettes or structured backbone patching systems. Because the cable does not flip the signal internally, you must manually cross the patch cords at one end of the hardware channel to complete the Tx-to-Rx link.

- Type B (Cross-Over / Rollover)

The Mapping: Fully reversed mapping sequence. Pin 1 on the MPO connector maps to the final LC leg (Leg 12 on a 12-fiber system), while Pin 12 connects to LC leg 1.

Connector Orientation: Key-Up to Key-Up configuration.

Best Used For: Direct transceiver patching (e.g., plugging a QSFP+ or QSFP28 transceiver directly into individual 10G or 25G SFP ports). It automatically handles the Tx/Rx reversal internally so no manual fiber crossing is needed. This is the most common polarity choice for direct fanout connections.

- Type C (Pair-Flipped)

The Mapping: Fibers are flipped sequentially in adjacent pairs. Pin 1 maps to LC leg 2, Pin 2 maps to LC leg 1, Pin 3 maps to LC leg 4, and Pin 4 maps to LC leg 3.

Connector Orientation: Key-Up to Key-Down configuration.

Best Used For: Traditional multi-node duplex network routing. It is rarely deployed in modern high-density data centers.