The ENI-110 is a network interface module that allows interconnectivity of alarm panels and field devices over Ethernet networks. This allows supplementation or replacement of standard RS-485 communication lines in order to increase distance limitations or to reduce site wiring. The ENI-110 is a stand-alone device that is equipped with an RS-485 output for connection to standard RS-485 wiring loops. Device is powered by an external power supply. The ENI-110 utilizes optional 256-bit AES Rijndael encryption so that all communication between devices (and thus between Access Control and Alarm Monitoring devices) is protected from monitoring or tampering from outside sources.