A multiplexor for an Improved Inter-Integrated Circuit (I3C) network includes a switch, a snooper, and an I3C slave module coupled to an I3C master interface. The switch selectably couples I3C busses to the I3C master interface. Each I3C bus incudes I3C slave interfaces. The selected I3C bus is the active bus, and the non-selected I3C busses are inactive buses. The snooper detects In-Band Interrupts (IBIs) from the I3C slave interfaces coupled to the inactive buses. When the snooper receives a first IBI on an inactive bus, the snooper provides an indication. The I3C slave module provides a second IBI to the I3C master interface in response to the indication.