1.TCP, UDP network protocol; 2. Serial port-RJ45 converter 3. Suit for LAN, VPN etc ... and supply one standard RS232 (or RS485) COM port. It have 16K buffer, its parameters can be set ... lamp control, telecommunications, post, bank and so on. 2. Product Features Build-in procotol RS232/RS485 to TCP/ ... humidity: 20~95% non-condensing KB2001 Serial port-RJ45 conerter network converter,Suit for LAN, VPN etc ...