Channel Type "MSF"

My relatively new MikroTik GW works fine. I’m just curious about the listed channel types “MSF”. I could not find any documentation. “LoRa” and “FSK” are familiar, but what does “MSF” stand for? Seems to be not changeable.
Any idea? Thanks!

Multiple Spreading Factors? However you might want to ask at the mikrotik forum given that it is their firmware displaying the message…