Reversibler Zuordner

A bi-directional relay translator is provided which responds to a local call for translating the equipment number of a calling line to the directory number of that line and which responds to a terminating call for translating the directory number of the called line to the equipment number of that line. The translation of an outgoing call is initiated by operation of the calling line relay which provides an equipment number identification, following which a translation to decimal directory number is effected. In the reverse direction, when a directory number is registered, completion of the registration initiates a translation of the decimal directory number to an equipment number.