INT 21 - CBIS POWERLAN - NETWORK REDIRECTOR - ???
AX = 3306h
Return: AX = 3306h
BL = ??? (usually 00h)
BH = ??? (usually 00h or FFh)
Note:   unknown function, is in conflict with DOS 5.0 version call

See also: 213306

213306 - CBIS POWERLAN - NETWORK REDIRECTOR - ???