Using more than one serial port / channel via USB

Hi folks,

I’m currently using an USB-to-serial adapter for managing other devices with RS-232 interface via a MikroTik hEX S and it works pretty well.

# settings for port "usb1"
/port set usb1 baud-rate=115200 data-bits=8 flow-control=none parity=none stop-bits=1

# disable system console for serial usb
/system console disable 0

/user add name=serial_ssh group=read password=my-secret-password

/special-login add port=usb1 user=serial_ssh

Now I’ve purchased an USB-to-serial adapter with 4 serial interfaces (https://www.get-console.com/shop/en/usb-to-serial-cables/91-4-port-expandable-usb-serial-cable.html). These 4 ports were correctly recognized as “Channels”:
serial_channels.png

Is there any possibility using these 4 serial interfaces individually? It seems that only the first serial port of the USB adapter can be addressed.

Thanks!