TCP COM Bridge - Redirect COM ports to a terminal Windows server

Connecting unconnectable

For Windows 2000 - Windows 11 (2019) (incl. Server, x86 and x64). Latest version: 1.7.6 build 921. .

You can redirect a COM port on a Windows Terminal Server using built-in Windows functions. But a data transfer rate can be unexpectedly slow. For example, the server uses the same data transfer channel for a video stream. But you can install TCP COM Bridge and get a separate dedicated data transfer channel for COM ports and higher data transfer rates.

1. Install TCP COM Bridge (download) on a server and configure a connection as a TCP server with a newly created COM port (Main menu → Devices → Add).

COM port

Fig. 1. COM port

Network connection

Fig. 2. Network connection

2. Do not forget to allow incoming connections in your server's firewall for the selected TCP port. If you transfer data through the Internet, configure your router too and redirect the same TCP port from the router to the server. If you connect multiple client computers to the same server, you should use a separate TCP port and virtual COM port for each client.

3. Configure TCP COM Bridge to start as a Windows service. The program will automatically start with Windows Terminal Server, create virtual COM ports, and accept connections from clients.

Service mode on Windows Terminal Server

Fig. 3. Service mode on Windows Terminal Server

4. Install TCP COM Bridge on a client computer with a shareable COM port. Configure connection parameters with that COM port.

Settings on the client computer

Fig. 4. Settings on the client computer

5. Configure the client part as a TCP client and specify the terminal server's IP address. When the client starts, it automatically establishes a connection with a server and starts redirecting COM port data.

Configuring network connection on a client

Fig. 5. Configuring network connection on a client

6. In this usage scenario, we recommend using the "keep-alive" option on the client and server. If this option is enabled, the server or client can quickly detect and restore a broken connection.

Keep-alive mode parameters

Fig. 6. Keep-alive mode parameters

See also

Slow receipt or bill printing from a remote accounting software.
Printing on one receipt, POS or fiscal printer from two computers.
Redirect COM ports to a terminal Windows server.
How to send data to a receipt, POS or fiscal printer from a remote accounting software.
How to the optimize operating system for faster COM port redirecting.