NAM2-250S v5.1.2 in a 6509 collecting netflow information from a 3845. For some reason RTP traffic is not recognized as RTP by the NAM. It shows up under unknown. I have a NME-NAM-120S in a 2811 running the same 5.1.2 code and it recognizes the RTP traffic including call information. Is that because the netflow data is different than the SPAN that the NME is receiving?