Modular jacks consist of single or multi-port, stacked, high performance, and surface mount varieties. Modular jacks offer compact size and high reliability. There are three keys to designing in a modular jack – those are orientation, termination and configuration. Each are equally important, and need to be figured out clearly to search for appropriate part number which would meet customer’s application. Most TE products in the modular jack portfolio offer options in all three categories.