An IEA recommended standard definition for extending an RS232C interface beyond the 50 foot limit.
An EIA recommended standard for cable lengths that extended the RS232 50 foot limit. Although introduced as a companion standard with RS449, RS422 is most frequently implemented on unused pins of DB25 (RS232) connectors. Electrically compatible with CCITT recommendation V.11.
An EIA standard that specifies electrical characteristics of balanced voltage digital interface circuits in a point-to-point link.
An interface standard similar to RS232 except differential voltages across twisted pair cables are used. This standard is more noise immune than RS232 and is often used to connect single or multiple devices to a data accumulator at distances up to 3,000 meters.
EIA recommended standard to extend the RS232 50ft limit. It is most commonly implemented on 25-pin connectors (DB-25s) and is electrically compatible with the ITU-TS V.11 standard.
A protocol similar to RS232 which makes use of differential transmission to provide high speed data transmission over significantly longer distances.
A standard for serial transmission of data between two devices. This defines the pin and plug in terms of size, shape and number of pins. An interface based on the RS422 standard. Allows longer distances between devices than RS232.
A generic serial communications protocol commonly used to exchange data over long distances between different devices. Less robust than RS232, but employing balanced pairs rather than single conductors as in RS232, meaning they are far more tolerant of a "dirty connection". See also RS232, RS485