The controllers are LINUX based - not UNIX. The N2ZAV repeater is 224.640 (it has a standard offset and a 151.4 pl). Try it out - it has great coverage from southern Middlesex County to Western Somerset County and beyond. 73, Joe - W2OZO 908-704-1222 / Wireless 908-566-0778 / Facsimile 908-685-0700 / Office jcash at joecash.com