"The industrial modem work is to convert your data into the format used on the communications connection and the remote modem converts that transmission back into data. Breaking the industry benchmark, the top-of-the range Smartmax is a unique and intelligent fusion of 3G capabilities with advanced functionality of an IndustrialModem /router, complete with built-in DNP3; all encased in a durable & robust metal casing. It includes RS232, RS485 & USB ports. DNP3 protocol and HSPA wireless connectivity to ensure local, national and international remote access via VPN, DDNS & FTP features. Applications: • 3g communications to data logging equipment • Receive sms reporting from your device • Message Traffic Board Signs • Traffic Counting • Security Camera Control • Environmental Applications • DNP3 Scada Control • SMS and Webface Control of Remote Telemetry Applications • RS232 and Ethernet Connectivity "