Communication with the TCP/IP device over the Ethernet network can be extended to more functions using NVT (Network Virtual Terminal) commands. It can be used according to the RFC2217 standard to change baudrate on remote Virtual Serial Port for example. The simple NVT control commands are included in the data stream with the character "FF" used as the command prefix. If the "FF" character occurs within the normal data stream, it is simply doubled. You can find detailed NVT and a complete TELNET description in the last section of this article, we shall begin with a detailed manual of used commands and examples.