[. . . ] Repeaters VHF / UHF Main commercial specifications : - 5 tone or CTCSS activation (CCIR, ZWEI, EEA standars) - 8 repeater calls in 5 tone - Tone squelch - Deadlock - T. O. T. [. . . ] They are associating simple use and easy programming while they provide reliability and high-performance. These equipments are allowing realizing a radio communication network with capability to tune separately receiver and transceiver. They offer various kinds of signalling (5tone, CTCSS) easy to install (single box), easy to connect and cheap. To meet these requirements, we designed a unique metal cabinet, as small as possible, while containing the Power supply, the diplexer, and of course the radio units. [. . . ] Many competitors offer repeaters, but either the diplexer is missing, either the power supply, either the logic board, in some cases all ! Using two mobiles has the effect of reducing maintenance problems, [. . . ]