The invention relates to a plastic enclosure (1) for enclosing industrial components. The enclosure comprising a case (2) made of plastics. The case comprises a rectangular rear wall (3) and four side walls (4, 5, 6, 7) delimiting an interior (8) having four corners (9, 10, 11, 12) at the junctures of side walls. The rear wall and the side walls together form a monolithic unitary box-like container which has a mouth opening (13) at one side enabling access to the interior. Each corner comprises fastening means for fastening of one or more panels (P； P1) inside the interior in parallel and at a desired distance relative to the rear wall. The fastening means comprises a pair of rib members (14, 15) molded integrally as unitary monolithic structures with the side walls. The rib members extend along the side walls between the rear wall and the mouth opening. Each rib member comprises a plurality of equally spaced grooves (16)xtending at right angle relative to the longitudinal direction of the rib member. The grooves (16) in the pair of the rib members (14, 15) of each corner are arranged as pairs of grooves which are mutually aligned, mutually located at the same level and facing each other. A support block (17) made of plastics having at least one pair of tongues (18) is adapted to be inserted into the at least one pair of grooves (16) to form tongue-and-groove joints at the two sides of the support block for holding the support block when installed to the corner. The support block (17)has a fastening element (19)for fastening of the panel (P； P1) to the support block.L'invention concerne un dispositif de communication (1) pour une communication sans fil. L'enceinte comprend un boîtier (2) en matière plastique. Le boîtier comprend une paroi arrière rectangulaire (3) et quatre parois latérales (4, 5, 6, 7) délimitant un intérieur (8) ayant quatre coins (9, 10, 11 12) au niveau des jonctions de parois latérales. La paroi arrière et les parois latérales forment ensemble
