On 18/02/2014 14:40, Gert Doering wrote: > Is this the major upgrade that was rumored, with a different OS underneath, > and a fully new upgrade algorithm, etc? (Our first ASR9001 is coming > "soon" :-) ) no, 4.x and 5.1.x still run on qnx. you're mixing them up with xr 5.0.x which runs on a linux kernel. Nick