I-RS-422 (TIA / EIA-422) inesantya esiphezulu, ukuchasana kwengxolo engcono kunye nobude bekhebula elide kunomgangatho omdala we-RS-232C.
Inkqubo ye-RS-422 inokudlulisa idatha kumazinga ukuya kwi-10 Mbit / s kwaye inokudlulisa idatha ukuya kwi-1,200 yeemitha (iinyawo ezingama-3,900). I-RS-422 yayisetyenziswa ngokubanzi kwiikhompyuter zeMacintosh zakuqala. Iphunyezwa nge-multi-pin isidibanisi kwi-RS-232 izixhobo ezifana neemodem, i-AppleTalk networks, RS-422 printers, kunye nezinye iiperipherals.