Features Adopt for Cortex-M3 MCU (128KB for SRAM) and 2MB Flash. Adopt for FreeRTOS real-time operating system. Support for TCP / for IP / for Telnet / for Modbus TCP protocol. Support serial port to 10 / 100M Ethernet data transmission, serial port speed can be up to 921600 bps. Support 10 / 100M Ethernet self-adaption. Specification: Item Type: HF5111B Serial Server Ethernet Interface Parameters: Ethernet Interface Form: 1 RJ45 Interface Standard: 10/100 Base-T auto-negotiation Network Port Protection: Static: 8KV contact discharge, 15KV air discharge Network Transformer: Integrated Network Protocols: IP, TCP, UDP, DHCP, DNS, HTTP, Server / Client, ARP, BOOTP, AutolP, ICMP, Web socket, Telnet, for FTP, for TFTP, for UPNP, for NTP, for Modbus TCP Data Security Protocol: for AES-128Bit, for DES3, for SSL / TLS v1.2 SNMPV1 / V2 / V3: Not supported IPV6: Not supported Serial Interface Parameters: Number Of Serial Ports: 1 (RS232 / 485/422) Interface Standard: RS232: DB9 pin type RS485 / RS422: 5.08mm terminal block Baud Rate: 2400-460800bps Serial Port Protection: Static: 8KV contact discharge, 15KV air discharge Surge: Differential mode 2KV, common mode 4KV Data Bits: 5, 6, 7, 8 Stop Bits: 1, 2 Parity: None, Even, Odd, Space, Mark Flow Control: No flow control, hardware RTS / CTS, software Xon / Xoff flow control Network Technical Parameters: Working Mode: TCP Server, TCP Client, UDP, HTTP, Telnetd IP Acquisition Method: DHCP or static IP, AutolP Domain Name Resolution DNS: Support Simple Transparent Transmission Mode: Support Product Features: IOT Service: Support Virtual Data Channel: Support Virtual Serial Port Software: for Windows XP / for Vista /7/8/10 (32bit \ 64bit), for Win Server 2003/2008/2012 Package List:  1 x Serial Network Server   1 x Serial Cable  1 x Network Cable  Package List 1 x Serial Network Server 1 x Serial Cable 1 x Network Cable