[FedCom] 415.05 Activity?

[Ken]

I've noted daily that this frequency no longer has any voice traffic on it 
in my area, but just about every 15 minutes or so a two tone signal is heard 
& than white noise, throughout the day....  This was formerly used by the US 
Postal Inspectors, NFM mode.  I have a P25/digital scanner and it does not 
indicate that this is encrypted transmission, but appears to me data 
related.  What are others monitoring?

Ken
Springfield MA Monitoring Area