> ## Documentation Index
> Fetch the complete documentation index at: https://support.taltech.com/llms.txt
> Use this file to discover all available pages before exploring further.

# TCP-Com support

> Get help using our software to connect serial devices and applications, create virtual COM ports, and share data over TCP/IP networks.

[Support home](https://support.taltech.com/index.md)TCP-Com

## Quick links

### Getting started

[What is TCP-Com?](https://support.taltech.com/tcp-com/what-is-tcp-com.md)

[TCP-Com Introduction](https://support.taltech.com/tcp-com/tcp-com-introduction.md)

[Video tutorials](https://support.taltech.com/tcp-com/video-tutorials.md)

### Orders & licensing

[View your orders](https://store.taltech.com/myaccount)

[Order and licensing information](https://taltech.com/ordering)

### Downloads & resources

[Download trial version](https://www.taltech.com/support-resources/free-trial-downloads)

[Manuals & brochures](https://www.taltech.com/support-resources/software-manuals-brochures)

[TCP-Com product page](https://www.taltech.com/tcp-com/)

## TCP-Com videos

Watch demonstrations of serial and TCP/IP connections.

[All video tutorials](https://support.taltech.com/tcp-com/video-tutorials.md)

## Support articles

Search articles…

> [accordion] Getting started
>
> * (Watch a video introduction to TCP-Com, the software that connects RS232 serial ports and devices to a TCP/IP network, and see how it works.)
> * (Watch demonstrations of serial and network connections with TCP-Com.)
> * (TCP-Com connects RS232 serial devices to a TCP/IP network and creates virtual COM ports, so you can communicate with serial devices from other PCs or over the Internet.)

> [accordion] Networking & routing
>
> * (Set up TCP-Com to connect a physical or virtual COM port to a TCP/IP network connection, as a client or a server.)
> * (Watch a video demonstration of converting between TCP/IP and RS232 communications with TCP-Com.)
> * (Watch a video demonstration of creating a virtual serial splitter cable with TCP-Com.)
> * (Send and receive serial data over the Internet with TCP-Com, including the router port forwarding, firewall, and IP address settings you may need.)
> * (New to TCP/IP? Learn the basics of how devices send data over a network, including IP addresses and ports, in plain terms.)
> * (Connect RS232 serial instruments to your network with TCP-Com or a serial device server, so any PC on the network can use them.)
> * (Use TCP-Com to make a serial instrument on one PC available as a virtual COM port on another PC over the network, so remote software reads it like a local device.)

> [accordion] Troubleshooting & service setup
>
> * (Set TCP-Com to start with Windows, including when no user is logged on.)
> * (Fix the TCP-Com error “cannot create virtual COM port”, usually caused by a second copy of TCP-Com running in the background or by driver problems.)
> * (Fix the TCP-Com error “COM Port is Unavailable” by checking that the COM port exists and that no other program or copy of TCP-Com has it open.)
> * (If TCP-Com can’t connect as a client to a TCP/IP server or device, check the IP address, port number, listening mode, firewall, and network.)
> * (Start TCP-Com first and WinWedge a few seconds later with a simple batch file, so WinWedge finds TCP-Com's virtual COM ports.)
> * (Run TCP-Com as a Windows service so it starts automatically when the PC boots, before anyone logs on.)
> * (Fix TCP-Com staying in listening mode as a TCP/IP server when a client can't connect, starting with client settings and the firewall.)

Still need help?
[Contact support](https://support.taltech.com/contact.md)

Mon-Fri, 9 AM–5 PM E.T.


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