This Recommendation specifies the electrical characteristics of a balanced digital interchange circuit, that may be employed when specified for the interchange of serial binary signals between Data Terminal Equipment (DTE) and Data Circuit-Terminating Equipment (DCE) or in any point-to-point interconnection of serial binary signals between data equipments. The balanced digital interchange circuit will normally be utilized on data and timing, or control circuits where the data signalling rate is up to a maximum limit of 52 Mbit/s