In addition to the standard plastic series ODU MEDI-SNAP (circular connector with push-pull locking made out of plastic), another version with metal housing has been developed. This metal version offers a variety of mechanical and optical advantages. For example, it is absolutely mating and mounting compatible with the plastic version. In addition, the connector has a flexible design of receptacles (receptacles for front-, rear-, and front-or-rear of panel assembly are available). This connector is offered to be a cost effective alternative to the metal push-pull connectors currently available.