There may be scenarios where a typical four-connector channel is not used when connecting these types of devices– especially those that reside in the ceiling space where it is impractical to install a faceplate. Instead, there is just one patch cord in the telecommunications room and the permanent link is terminated at the other end with a plug so it can plug directly into the device, essentially eliminating the equipment cord. This creates what is now known as a Modular Plug Terminated Link, or MPTL, and as this application becomes more common and shows up in industry standards, it’s good to get a handle on how to test it today.

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