Search Definithing > Rs-232d Rs-232d communications, standard The EIA equivalent of ITU-T standard V.28. [Difference from EIA-232/EIA-232C?] (1995-03-02) Read Also: Rs-422 EIA-422 Rs-423 EIA-423 Rs-449 EIA-449 Rs-485 EIA-485 Rs6000 RISC System/6000