Vinod, There is no need to buy additional licenses or no need to  add per device license  on the central manager. You can go with the 294-4G or the 474 device , these can support upto 250 devices. However would suggest you to go with a higher model s...

Hi Vinodpol, You need to have a central manager to mange the waas devices, this is a standalone device and cannot be used to as a application accelearator, a 274 devices can manage upto 125 devices , if you want to have a reducndancy you can have a p...

Hi Gonzali, Yes you can convert a WAE-512 from ACNS 5.1 to WAAS, but there is no command to disable ACNS, all you have to do is use the recovery CD and Install WAAS. RegardsAbijith