The JDSU SQ series optical switch is a highly flexible module with high optical performance in latching or non-latching applications. The full feature set and large number of optical configurations available in a common package and interface make it ideal for a wide spectrum of applications. The switch connects one or two channels to one of several (up to eight) channels. Both single-mode (SM) and multimode (MM) versions are available. This switch is also available in multi-pack configurations, for example 2 x 4, 2 x 6, 2 x 8 D configuration (Duplex 1 x 2, 1 x 3, 1 x 4). While in operation, the switch connects optical channels by using prisms to redirect the signal from an input port into a selected output port. Using collimating optics minimizes the insertion loss (IL) and improves the repeatability and stability of the optical parameters. The switches are optically passive, and therefore, are transparent to signaling formats. Configurations can be manufactured for bi-directional performance as a factory option.