Generally, Wisenet Controllers (SPC series) via USB port were compatible with CMS (e.g SSM) in Windows PC only. Please refer to the below diagram.
However, since x86 Intel NVRs (e.g PRN-6400), SPC-2000/2001 Controllers are compatible with thses NVRs directly via USB ports of the NVR. Please refer to the below table which is from the NVR's manual document.