MTP/MPO Type-B Cable Overview

The type-B polarity MTP cable meaning is to use a key-up connector on both ends of the cable. Often referred to as a 40G MTP cable, the type-B MTP cable is extremely versatile. This cable assembly can be used to plug directly between your 40G QSFP+ optic transceivers. As you can see in the diagram, this cable has a “flipped” polarity and will result in a Pin 1 to Pin 12 relationship. This is extremely useful because 40G optics utilize parallel optics, meaning instead of alternating Tx and Rx in a duplex pattern, the port will look like the following diagram.