Abstract: A communication network transceiver assembly for interfacing between a communication bus and a host system includes a transceiver circuit for coupling data signals to and from the communication bus, a housing for containing the transceiver circuit and several indicator LED's which indicate the operating status of the assembly. The indicator LED's are an integral part of the transceiver assembly and assist in troubleshooting and maintenance. The indicator LED's display the status of transmit and receive signals, collision presence, heartbeat test enable and power. Those LED's which indicate time varying digital signals are driven by interface circuits which include an asymmetrical difference amplifier for sensing the time varying signal, a pulse stretcher and an LED driver.