Eltima 的虚拟串口工具

Serial to Ethernet Connector (formerly VSPD.net) is the software-based solution that allows you to share up to 255 serial port devices over TCP/IP network turning your computer into low-cost terminal server. As the result, any serial port device connected to COM port could be accessed from anywhere in the world as if it is attached to local PC.

Serial to Ethernet Connector uses virtual serial port technology which fully emulates real serial ports and duplicates all their functionality. Windows OS treats virtual serial ports in the same way as real ones therefore you are no longer limited to just 2 real ports (less/any number of physical ports you have) per system and may create COM port connections without occupying any real serial port. To create such connection you should create serial port's connection pairs on two computers. You will specify IP address and port number to access to (in case you are setting up the client), port number and TCP/COM options to listen to (in case you are establishing the terminal servers) or remote serial port name to access (if you are emulating null-modem connection). These settings will be used to connect to remote computer. When serial port device, attached to real COM port, sends communication data it will be actually transmitted over TCP/IP network.

Formerly known as VSPD.Net Serial to Ethernet Connector has completely new interface and greatly revamped engine. It provides the ability to create four different types of connection:

• Port-to-port connection, which lets you connect two computers over TCP/IP network. In this way you can emulate virtual null-modem cable connection. Serial to Ethernet Connector allows you to customize remote serial port settings locally or dynamically fetch these settings from the remote end. With Serial to Ethernet Connector you are no longer restricted by null-modem cable length and can establish direct connection with virtually every PC over the world
• Port-to-TCP client, which allows you to connect to remote server and send/receive communication serial data over TCP/IP network. All that you have to do is specify remote server's IP address (or network name) and TCP port to connect to and open local COM port. Once connection is established, all data sent from remote serial port device, attached to the server, will be genuinely delivered to local serial port where it can be further processed
• Port-to-TCP server: you will find it indispensable to establish multiple connections to local serial port device and redistribute COM port device data all over the world. Server listens to all incoming connections at the defined TCP port and redirects input/output serial data to TCP/IP network. You may specify TCP port to listen to, COM port and TCP port access rights, etc. Server could be configured to start automatically on system boot, taking advantage of Windows services approach
• Port-to-UDP connection that allows you connect two serial ports via UDP (User Datagram Protocol), providing additional flexibility for specific services (DNS, mail, finger, etc.)