Note: This model has been replaced with a newer model: STE211. https://www.fiberoptics4sale.com/products/ste211-2-port-serial-rs-232-and-rs-422-rs-485-to-ethernet-ip-terminal-server The STE-100A-232 serial terminal server (access server) allows RS-232 asynchronous devices to connect over Ethernet (10/100Base-TX) using TCP/IP protocol. This small powerful device allows serial only managed devices to be seen and controlled over Internet. STE-100A-232 can be managed either from serial port or RJ-45 Ethernet side. Serial port is DTE, which allows direct connection to a DCE device (like modem). For connection to a DTE also equipment (like PC) a null-modem (cross-over) cable is required. Features of STE-100A-232 terminal server: Complete TCP/IP stack implementation Supports TCP Server, TCP client, UDP, Virtual Com Mode, Winsock Mode, API Configuration by web browser Low cost and compact design, good for automation applications: 85 x 53 x 21 mm Works in server or client mode Provides serial connection over Ethernet Technical specifications: Connectors: EIA RS-232 DB9 male connector and RJ-45 10/100Base-TX Ethernet connector Support for DHCP, HTTP, ICMP, ARP, IP, UDP, TCP Handshaking: RTS/CTS, XON/XOFF, none Protocols: TCP/IP, ARP, ICMP Management: Web based, Remote Access, Firmware upgrade support LEDs: Ready, Link/ACT, TD/ RD Power: External 12V AC(AC 100-240V adapter included in box) Installation: DIN-Rail support, wall mounting support Temperature: 0-60§C (Operating), -20 - 80§C (Storage) Humidity: 5%-90% non-condensing Dimensions: 53mm x 85mm x 21mm Weight: 90g