OS3 user. A Brandmeister group that I use has just opened up a native link via YSF. Since I'm using a Yaesu FTM-400xdr I figure accessing via YSF would be preferable to cross-moding to DMR.
The message they posted was "The Wires-X link is up!! 81335 is the new room number to link to (DMR) 31655."
I tried using YSF server and FCS and both showed that 5-digit YSF group as invalid (red). What am I not understanding here? How can I access this YSF room while mobile from my Yaesu radio and OS3 hotspot?