Small Form Factor (SFF) connectors are compact fiber optic connectors that are designed for small spaces. They are about half the size of most standard sized optical connectors. These types of small components are always beneficial in fiber network applications where space is a factor. Among the early compact solutions developed for this purpose, the SFF transceiver (Small Form Factor transceiver) played an important role in increasing port. Here is a brief overview of five SFF connector designs. MT-RJ: The MT-RJ is the product of a coalition that includes Corning Cable Systems (formerly Siecor), AMP, Hewlett-Packard, USConect, and Fujikura.