[FedCom] 172.775 - Boston MA area - bursts of P25

[Chris Parris]

>>>
172.775 - Boston MA area - bursts of noise which
sounds like P25 traffic - each burst is 1/2 second
long and occurs at infrequent intervals - a
loud/strong signal received on a P25 scanner
<<<

I was just in Boston and heard the same thing on 163.750 MHz. I have also
heard the same thing on some of the VHF frequencies used by the Justice
trunked system up in Washington state. I know that the P-25 radios support
data transmission modes of some sort. Since I heard these "bursts" of P-25
signal almost 24 hours a day, I suspect that it might be some sort of alarm
or status reporting system. possibly for a secured area in some federal
agency's office. They often have the offices or evidence storage areas
alarmed.

>>>
Peter, et al.,
   Are you near Logan Airport? Sounds like it could be TSA at the airport. 
Here in Rhode Island at Green Airport TSA is on 171.925 Digital with 
encryption. I have 172.775 on a list from the web as "airport security". 
Doesn't say what airport or agency. Please let us know if you positively 
identify it.
<<<

Gil, I was also just in Providence and heard the TSA quite well on 172.9
MHz, P-25 in the clear - same with Boston Logan. Are you sure that the
171.925 is supposed to be TSA? Just curious since it's encrypted how would
you? If it is the TSA, that's another set of "non-standard" frequence is
that seem to be popping up...

- Chris

 --
Chris Parris
Fed Files Columnist
Monitoring Times Magazine
chrisparris at monitoringtimes.com
http://www.monitoringtimes.com