Apart from the above fiber optical connectors, there are also some other types of connectors, which are not be used so wide. LC Connector: A standard ceramic ferrule connector, which is half the size of an ST connector, is the LC connector. This fiber optical connector is extensively used in single mode systems, performs well, and is easily terminated with any adhesive. Used in multimode systems only, the MT-RJ connector is duplex with both fibers in a single polymer ferrule. Pins are used for alignment with male and female versions. The Opti-Jack is a rugged, but neat duplex connector designed around two ST-type ferrules in a package. This connector has both male and female (jack and plug) versions. An inexpensive duplex connector that uses no ferrule at all is the Volition connector. This connector aligns fibers in a V-groove, like a splice. Mainly used for pre-terminated cable assemblies is the MT connector, which is a 12-fiber connector for ribbon cable. To diagnose any problems or to check the quality of the termination procedure, a fiber optic microscope is used to inspect fiber optical connectors. The microscope allows inspection of the connector from any angle either by tilting the connector or ialluminating the angle. When inspected, the connector should have a smooth and scratch-free finish with no signs of cracks or chips on the fiber where it is either pulling back into the ferrule or protruding from the end. As a safety precaution, a worker should always check to make sure there is no power present in the cable before looking at it in a microscope. The fiber end face of a connector should never be touched. Always keep unused connectors covered with a plastic dust cap and discard any damaged connectors. With the wide variety of fiber optical connectors available today, companies can easily convert to fiber optic networks and start enjoying the benefits of a faster, more efficient work environment.