Yes, TSX does RADIUS. RADIUS support is integrated into the TSX-Online product. Just having the standard SY:STARTBBS.CMD procedure, which is activated by the DOBBS gen parameter, detaches the RADIUS server each time the system boots. The RADIUS server quietly exits of no RADIUS clients (i.e., terminal servers) are defined in SYSOP. There's a chapter in the TSX-Online Networking Manual on RADIUS support. Here are pointers to further information related to RADIUS: