today I had to configure an Ethernet Switch (AT-8000GS/48) via serial console to turn on stacking mode and so on. I used a RJ45 to Serial-9-Pin to USB adaptor.

First, I tried to use PuTTY under Windows 7. After selecting Serial Connection it asks for the device name like COM1 and a speed. A colleague told me the speed, but I had no idea how to find out the device name. Device Manager only says "Serial USB Adaptor".

Finally I booted up Ubuntu and connected via PuTTY, because dmesg told the new device name.

TL;DR

How can I find out the name of the serial port on Windows?

2 Answers

1. Go to Device Manager
2. Click Ports
3. Find your Serial USB Adapter in the list
4. Right click the device, and click Properties

5. Go to Port Settings, then Advanced

6. Here, you should have a drop down box where you can choose the COM port.

Some instructions for this with pictures can be found here.

5

The COM port can be found in the device manager:

1. Run devmgmt.msc
2. Open ports tab.
3. Here you will find the listed COM port devices, and their numbers. COM1, COM2

Example:

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