---
title: "Define com-port to use for serial connection ?"
slug: "can-i-define-which-com-port-to-use-for-serial-connection"
tags: ["FAQ", "LinkManager"]
updated: 2021-05-04T19:18:20Z
published: 2021-05-04T19:18:20Z
canonical: "kb.secomea.com/can-i-define-which-com-port-to-use-for-serial-connection"
stale: true
---

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

# Define com-port to use for serial connection ?

This article will help answer this commonly asked question

In LinkManager you can predefine the COM port used for serial communication.

1. Right-click the tray icon (might be hidden, click the ^ symbol in the Windows system tray).
2. Select "Options"  
![](https://cdn.document360.io/88f49507-a7a0-4636-b297-13c4d0065310/Images/Documentation/image-1617716731969.png)
3. And type in the com port number you wish to assign to the serial port emulator (com0com)  
![](https://cdn.document360.io/88f49507-a7a0-4636-b297-13c4d0065310/Images/Documentation/image-1617716742455.png)

NOTE: Changing the COM port while connected to an agent is not recommended Some other factors can have an effect on a successful change or set of the COM port but not covered here.

If you experience issues changing the COM port you can try a reboot of the PC – the only guaranteed solution to release a COM port in Windows. You can always monitor the actual COM port setting by searching for the “com0com” device in the Windows Device Manager.

![](https://cdn.document360.io/88f49507-a7a0-4636-b297-13c4d0065310/Images/Documentation/image-1617716776808.png)

## Related

- [Can I still use LinkManager 7 on my PC?](/can-i-still-use-linkmanager-7-on-my-pc.md)
- [Where can i find the LinkManager Sniffer tool?](/where-can-i-find-the-linkmanager-sniffer-tool.md)