Multi-purpose Serial over Ethernet redirection software

TCP-Com lets you easily access serial devices via a TCP/IP network as if they are attached to your local computer. You can also direct serial data to and from a network by creating as many (virtual or real) COM ports as you need for your serial communication setup.

Only $199 for a single PC license with free technical support
Access serial devices over your network

Use TCP-Com as a Serial Device Server, enabling your USB or COM-connected serial devices to transmit data through your network or Ethernet connections.

Create Virtual COM Ports Easily

Receive network data through virtual COM ports on your PC, enabling your existing serial communication software to operate without hardware limitations.

Connect more serial devices to your PC

Attach up to 256 serial devices to your PC’s COM or USB ports, ensuring reliable and simultaneous communication over TCP/IP networks for enhanced productivity.

Share a Single Device / COM Port with Multiple Apps

Enable multiple applications to access a single COM port, expanding what you can do with a single serial device.

Build multi-purpose Serial ↔ Ethernet redirections

TCP-Com is a six-in-one Serial-Ethernet tool:

1. Share serial devices over a network

Diagram from left to right: RS232 devices such as a scale and balance sending data to a computer running TCP-Com. In this case, TCP-com runs in server mode to make those devices available on a network for client PCs.

Use TCP-Com as a PC-based serial device server (also known as a Terminal Server) to make any device accessible on a network.

Attach serial devices to your PC’s RS232 or USB ports and TCP-Com will make the data available at an IP address (and port number) on your network. Add additional USB or RS232 ports to your PC to make TCP-Com act as a multi-port Serial Device Server or Terminal Server.

2. Create virtual COM ports to receive network data

Diagram showing TCP-Com receiving data from a TCP/IP network and then sending that data to (1) an RS232 app via a virtual COM port and (2) an external RS232 device via a real COM port.

This allows you to send or receive data over a TCP/IP network using any existing COM port software.

Some software only recognizes data coming from RS232 COM ports. TCP-Com can easily create virtual COM ports and redirect Ethernet, Internet, or network data to these RS232 ports. This allows you to use any existing serial communications software to communicate over and collect data directly from your IP networks.

3. Feed RS232 COM port data to multiple PC apps or COM ports

Diagram showing TCP-Com receiving RS232 data from a physically connected device and then sending that data to two different RS232 apps in Windows via different virtual COM ports.

Use TCP-Com as a virtual splitter cable.

Windows does not allow multiple applications to access the same COM port. Bypass this restriction by using TCP-Com to split a single COM port into multiple Virtual COM ports (which TCP-Com creates). This allows all your existing serial communications applications to access the same data.

4. Use an IP network as a giant RS232 cable

5. Open network COM ports as local COM ports

6. Map one network port to another network port

and more…


TCP-Com has many features to allow it to easily redirect any serial connection to TCP/IP or the other way around.

Usage Scenarios

  • Use TCP-Com as a virtual Serial Device Server connecting serial devices to TCP/IP networks
  • Make TCP/IP port connections act as virtual COM ports on any Windows PC
  • Make real COM ports function as TCP/IP port connections
  • Send TCP/IP network data to virtual or real COM ports
  • Communicate over a TCP/IP network using multiple serial devices connected to a PC

Additional Features

  • Advanced error recovery features for automatic repair of broken TCP/IP connections
  • Input data from up to 256 simultaneous COM ports
  • Input or output data with up to 256 TCP/IP connections as a client or server
  • Ability to connect to multiple clients as a TCP/IP server
  • Support for both UDP/IP and TCP/IP protocols
  • Support for up to 115Kb serial communications
  • Option to install TCP-Com as a Windows service
Wondering how TCP-Com can help with your COM port and network data needs?

Easy Setup

In the TCP/Com window, just select the COM port number and the serial communications parameters for your serial device and enter an IP address and a socket number. Then activate!

It’s that easy! COM port data will appear at your set IP address, and data from an IP port will appear at a real or virtual COM port.

TCP-Com connection setup window.

What our users are saying

We offer an unconditional 90-day guarantee and lifetime free technical support with every software purchase.

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Get TCP-Com Today

Only $199 for a single PC license.

Discounted multi-license/PC pricing also available for any quantity.

Demos & purchases come with free, unlimited technical support.


After purchase, you will receive a link to generate an unlock code for the demo. The unlock code will convert the demo to the full version.


Not only is TCP-Com extremely easy to use, it also comes with free & unlimited technical support by phone or email. All software comes with extensive support resources.


This software can be installed on all versions of Windows with minimal system requirements.

TCP-Com is trusted by thousands of major companies worldwide.
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