PLTS

A party line telephone system (PLTS) is a telephone system with permanently connected subscribers and featuring selective calling. It is especially suited for small private telephone systems with relatively few subscribers and low traffic density. The system consist of a 19" rack R7AH, where bridging amplifiers type J3KA can be installed. As a 4W telephone set a SETEL-D can be connected to the bridging amplifiers. The SETEL-D is a 4-wire telephone with a selective DTMF number decoder.

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