The EZL-400S is a serial to Ethernet or serial to Wireless converter with four serial ports. It adds network connectivity to devices by processing TCP/IP protocol required to send and receive data over the Internet. The EZL-400S also makes it possible to extend the distance of serial communications without any change to existing legacy systems or replace direct serial connection. It is a simple and easy way to bring the advantages of remote control and management to serial devices not connected to a network. By using the EZL-400S, devices can be remotely controlled, managed and monitored over the Internet. Additionally the EZL-400S supports secure data communications so that it can be used for secure applications.