A communication system, comprising a cabinet; at least one first electronic unit communicable via a first communication protocol and arranged within said cabinet; at least one second electronic unit communicable via a second communication protocol and arranged outside said cabinet; and a communication device, comprising a communication unit, comprising a carrier substrate, at least one transceiver comprising at least one antenna, wherein said at least one transceiver is arranged on a carrier substrate, and at least one converter arranged to convert between different communication protocols, wherein said communication unit is configured to establish a connection between said communication unit and at least one first electronic unit, and between said communication unit and at least one second electronic unit via said at least one transceiver, and wherein said communication unit, based on said connection, is further configured to establish a communication between at least one first electronic unit communicable via a first communication protocol and at least one second electronic unit communicable via a second communication protocol via said at least one converter, wherein said communication device is configured for arrangement at least partially within a wall of the cabinet, and wherein at least one of said at least one transceiver is configured to protrude from the wall into the exterior of the cabinet for establishing a connection with said at least one second electronic unit arranged outside said cabinet, and wherein said communication device further comprises a housing arranged to at least partially accommodate said communication unit, and a cap attached to said housing with the aid of a tool and arranged to at least partially cover said housing protruding from the wall into the exterior of the cabinet, whereby the cap contributes to the tamper resistance as well as the anti-theft protection of the communication device, wherein said housing and said cap comprise reciprocal snap connection elements in the form of at least one annual groove and at least one annual flange configured to project into said at least one annual groove. a cabinet; at least one first electronic unit communicable via a first communication protocol and arranged within said cabinet; at least one second electronic unit communicable via a second communication protocol and arranged outside said cabinet; and a communication device, comprising a communication unit, comprising a carrier substrate, at least one transceiver comprising at least one antenna, a carrier substrate, at least one transceiver comprising at least one antenna, wherein said at least one transceiver is arranged on a carrier substrate, and at least one converter arranged to convert between different communication protocols, wherein said communication unit is configured to establish a connection between said communication unit and at least one first electronic unit, and between said communication unit and at least one second electronic unit via said at least one transceiver, and wherein said communication unit, based on said connection, is further configured to establish a communication between at least one first electronic unit communicable via a first communication protocol and at least one second electronic unit communicable via a second communication protocol via said at least one converter, wherein said communication device is configured for arrangement at least partially within a wall of the cabinet, and wherein at least one of said at least one transceiver is configured to protrude from the wall into the exterior of the cabinet for establishing a connection with said at least one second electronic unit arranged outside said cabinet, a housing arranged to at least partially accommodate said communication unit, and a cap attached to said housing with the aid of a tool and arranged to at least partially cover said housing protruding from the wall into the exterior of the cabinet, whereby the cap contributes to the tamper resistance as well as the anti-theft protection of the communication device, wherein said housing and said cap comprise reciprocal snap connection elements in the form of at least one annual groove and at least one annual flange configured to project into said at least one annual groove.