RECEPTACLE ASSEMBLY, CAGE AND MOUNTING METHOD

An embodiment includes: a connector configured to allow a module substrate of a pluggable module to be inserted to the connector along an insertion-extraction direction Die and configured to be electrically connected to the module substrate; a cage having a cage body configured to accommodate the connector and defines a space in which the pluggable module is guided and inserted along the insertion-extraction direction Die. The connector and the cage body are mounted on a substrate such that the insertion-extraction direction Die is substantially orthogonal to the front side of the substrate and a fixing part for fixing the cage body to the substrate is provided at a rear end edge of the cage body located on the substrate side when mounted on the substrate.