Abstract: A rail-arrangement having a first mounting rail and a spaced apart second mounting rail for receiving carrier units for fibre-optic components, in particular for patch panels. The first and second mounting rails each extend over multiple discrete height levels (H1, H2, H3), to receive and to distribute the received carrier units. Each mounting rail has at least one primary linear guide at each height level (H1, H2, H3), to guide the received carrier unit parallel to a longitudinal axis (L) of the mounting rail. Each mounting rail has, at at leas one height level (H1, H2, H3), bearing surfaces for the primary linear guide and/or for the received carrier unit. The bearing surfaces are spaced apart from one another along the longitudinal axis (L) of the mounting rails.

Abstract: A module assembly (1) for fibre-optic distribution, which is mounted along a mounting direction in a slot (11) defined in a carrier unit (2), with a centre region (M) through which a centre axis (A) oriented in the mounting direction (x) runs. Two side regions (S), each of which is positioned opposite the other relative to the centre axis (A) each have a side wall (20.1). At least one of the side walls (20.1) has in certain sections along the centre axis (A), a curvy and/or multi-step profile that changes a distance (d) from the centre axis (A) such that the at least one side wall (20.1) forms at least one protrusion or setback portion (23, 24, SP) for form-fitting mounting a module assembly (1) in the slot (11) defined in the carrier unit (2).

Abstract: A rail arrangement is useful for mounting a carrier unit for a fiber-optic component to a distribution frame. The rail arrangement has a first mounting rail and a separate second mounting rail which are spaced apart from each other and are designed to receive the carrier unit jointly between the mounting rails. Each of the mounting rails has at least one fastening point for fastening the mounting rails to the distribution frame. In some implementations, the carrier unit may comprise a fiber-optic patch panel.