i am using this feature all the time now, it’s EXCELLENT. Mikrotik - thank you for adding this. Please do the same for USB devices (remote cameras, remote cell phones, etc - how cool would that be!)
/port remote-access add
just tell it RAW as the format if you want direct access with telnet.
I am now using RouterOS as a data collection device monitoring water tank levels. I’ve hooked up an A/D converter pic controller to the serial port and then i can telnet in, read the values, and plot them with a remote MRTG box.