Review on 🔌 StarTech.com Wall Mount USB to Serial RS232 Adapter - 4 Port Hub - COM Port Retention - FTDI USB to DB9 RS232 - Din Rail Compatible (ICUSB2324I), Black by Gary Duncan

Good reliable product, but on Win7 it periodically disconnects and reconnects using the following group of communication ports. This can be quite annoying when you are running applications that are listening on a specific communication port and it suddenly changes. Sometimes you can unplug it, wait a bit, plug it back in and it goes back to its original/correct communication ports. It doesn't work, you have to reboot. If it's not crazy, this works very well.