RAILROAD ENVIROXTREME SERIES REX2009 Certifications Product Versions Level Red Hat Enterprise Linux (x86_64) 6.1 - 6.x Certified [1] Red Hat Enterprise Linux (i386) 6.1 - 6.x Certified [2] Additional Notes Presidio System Engineering's REX Series network device has detected Audio hardware in it but does not seem to support audio Presidio System Engineering's REX Series network device has detected Audio hardware in it but does not seem to support audio Vendor: Presidio Systems Engineering