V.28

V.28

(communications, standard)
An ITU-T physical interface standard for serial data communications equipment, formally titled "Electrical Characteristics for Unbalanced Double-Current Interchange Circuits". The combination of V.28 and V.24 is equivalent to the EIA's RS-232 and uses the same 25-pin connectors.
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V.28

An ITU standard (1972) that defines the functions of all circuits for the RS-232 interface. In the U.S., EIA-232 incorporates the electrical signal definitions of V.28, the control signals of V.25 and the connector and pin assignments defined in ISO 2110.
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