 It is normally implemented in integrated circuit technology and can also be employed for the interchange of serial binary signals between DTE & DCE.RS-423 is closely related to the RS-422 standard, both of which used the same overall signaling system, but differed in that 422 had a dedicated return line for every data pin, while 423 used a single return line.Use of a common ground is one weakness of RS-423 (and RS-232)