A bus interface for converting communication signals in a communication protocol, which includes a plurality of modes of communication, at least two of the modes of communication each having a distinct operational signal level, between communication signals having multiple distinct signal levels and communication signals having compatible signal levels, the bus interface comprising: an amplitude adjustment circuit, coupled to a communication bus and including a mode detector circuit, for selectively adjusting the amplitude of communication signals received from the communication bus, based upon a detected mode of the communication signals, a transmitter coupled to the amplitude adjustment circuit for emitting amplitude adjusted communication signals received from the amplitude adjustment circuit, which includes signals supporting multiple modes having compatible signal levels; said bus interface being characterized in that it further comprises: a receiver communicatively coupled to the transmitter for detecting amplitude adjusted communication signals emitted by the transmitter; and an amplitude restoration circuit coupled to the receiver and including a mode detector circuit, for restoring the amplitude of the detected amplitude adjusted communication signals, based upon the detected mode of the detected amplitude adjusted communication signals, the amplitude restored detected amplitude adjusted communication signal including signals supporting the at least two modes having distinct signal levels. an amplitude adjustment circuit, coupled to a communication bus and including a mode detector circuit, for selectively adjusting the amplitude of communication signals received from the communication bus, based upon a detected mode of the communication signals, a transmitter coupled to the amplitude adjustment circuit for emitting amplitude adjusted communication signals received from the amplitude adjustment circuit, which includes signals supporting multiple modes having compatible signal levels; said bus interface being characterized in that it further comprises: a receiver communicatively coupled to the transmitter for detecting amplitude adjusted communication signals emitted by the transmitter; and an amplitude restoration circuit coupled to the receiver and including a mode detector circuit, for restoring the amplitude of the detected amplitude adjusted communication signals, based upon the detected mode of the detected amplitude adjusted communication signals, the amplitude restored detected amplitude adjusted communication signal including signals supporting the at least two modes having distinct signal levels. a receiver communicatively coupled to the transmitter for detecting amplitude adjusted communication signals emitted by the transmitter; and an amplitude restoration circuit coupled to the receiver and including a mode detector circuit, for restoring the amplitude of the detected amplitude adjusted communication signals, based upon the detected mode of the detected amplitude adjusted communication signals, the amplitude restored detected amplitude adjusted communication signal including signals supporting the at least two modes having distinct signal levels.