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