[Scan-DC] Metro: DC Fire and EMS radio encryption blamed for failure in de - DC News FOX 5 DC WTTG
Joel Kahn
jrkahn at att.net
Fri Jan 23 15:17:52 EST 2015
Dewey is correct. In another life, I was involved with the early training of all Metrorail personnel (Supervisors, operators and station attendents) in First Aid & CPR. As such, I stayed in contact with many of these people while I worked in the city and took Metro to and from home and work every day.
The Leaky Line antenna system is connected to repeaters/boosters througout the system. There is a comms closet in every station (at least below ground).. This antenna carries signals for not just emergency operations, but regular train & operations communications as well
Joel R Kahn
________________________________
From: Dewey3 <dewey3 at gmail.com>
To: Scan DC List Server <scan-dc at mailman.qth.net>
Sent: Friday, January 23, 2015 12:16 AM
Subject: Re: [Scan-DC] Metro: DC Fire and EMS radio encryption blamed for failure in de - DC News FOX 5 DC WTTG
I would respectfully disagree. Antennas must be connected to "something"
to work. Just running "leaky" coax through the tunnels will not do
anything if that coax is not connected to something to assist with/boost
the received signal. That something, if not encryption capable, is not
going to carry/repeat an encrypted signal. The only place where this would
be a non-factor is with direct/simplex transmissions. I know there were
reports that the direct channels were not working (insert rhetorical why),
but outside of those direct channels, encryption could have very much
played a role.
Dewey
On Jan 22, 2015 11:04 PM, "Jeff Krauss" <jeff at krauss.ws> wrote:
> Everyone should read Dave Statter's commentary and Dallas Lipp's comment
> on Dave Statter's page.
> http://www.statter911.com/2015/01/22/attention-members-
> congress-reporters-metro-not-talk-dc-fire-radios-dcfd-
> doesnt-talk-metros-radios/
> Encryption may have created a problem for the public safety radio base
> station located at the Metro ops communications center (OCC) in Landover,
> but probably not for the distributed antenna system within Metro tunnels.
> Encryption (although we hate it) probably had no impact on the incident.
> Sorry.
>
>
> At 10:46 PM 1/22/2015, Alan Henney wrote:
>
> Metro: DC Fire and EMS radio encryption blamed for failure in de - DC
>> News FOX 5 DC WTTG
>>
>> http://tinyurl.com/muoxjjk
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