What WAE network modules will work in a 2821 router? This 2821 has a dual-T1 Multipoint connection back to our data center and I know that the users will benefit greatly from WAAS, but I'd rather not have to upgrade the router to a 3800 just to install a WAE module
NME-WAE-502 will give you full functionality with the enterprise licence. This is the NME that is the most widely used for WAAS.
NME-WAE-302 is available, but only supports the transport license which give you TCP optimizations only (no application AO support).
NME-WAE-522 is only supported in the 3800 series routers.
Hope that helps,