Powerline communications (PLC) is a technology that transmits data over a standard powerline. An automatic meter-reading system (AMR) transmits billing information about customer power consumption from individual electricity meters over the PLC to a central administrative center. AMR does not require utility personnel to gather power consumption data manually from each customer. This application note describes a reference design that uses the MAXQ3120 microcontroller and MAX2986 integrated powerline digital transceiver to enable seamless PCL/AMR communications.