[sbe-eas] Subject: Re: PEP Stations
ed.czarnecki at monroe-electronics.com
Mon Feb 13 16:00:20 EST 2012
Not sure what the issue is here. I think the point is that these
dissemination systems can function in a collaborative or supporting manner.
CMAS messages will be short, and likely result in a call to action to
monitor radio/TV/cable. Broadcast alerts will be more expansive, but a
large mass of folks may not be in front of a TV or radio.
Cell site power backup is something like 8 hours, right? I've worked with
a number of TV stations that had (and have) insufficient power backup as
well. What is the diesel reserve of even a PEP (probably not up for public
discussion anyway)? Basic point here is that each system has it own
technical and usage limitations. Each can play a supporting role, however,
within those limitations.
From: sbe-eas-bounces at sbe.org [mailto:sbe-eas-bounces at sbe.org] On Behalf Of
Sent: Monday, February 13, 2012 3:38 PM
Cc: sbe-eas at sbe.org
Subject: Re: [sbe-eas] Subject: Re: PEP Stations
That is fine as long a the cell site is working. We have learned that is not
On 2/13/12 3:21 PM, askenyon at cox.net wrote:
> CMAS uses the cellular providers system management data backbone to
> route messages to the towers/sectors that serve an affected area. The
> cell site then sends a broadcast (one to many) message that is
> received and displayed by any compatible handset that is logged in to
> that tower. This method does not compete with or conflict with voice,
> SMS messaging or Internet (broadband) services. For GSM network based
> networks/phones this method is called Cell Broadcast. It is a one-way
> message. If you receive a CMAS alert, you may not be able to use
> your cell phone to check with home or work but the alert and
> subsequent alerts should reach you. That would be a good time to
> check with a radio or TV station for more information.
> Al Kenyon
> On Mon, Feb 13, 2012 at 1:05 PM, W2XJ wrote:
>> I can speak from the experience of both 9-11 and the Northeast
>> blackout in NYC that cell phones are useless. In one case a lot of
>> infrastructure was lost and the remainder highly overloaded and the
>> other batteries ran down after 2 hours. In both cases landlines were
>> also heavily impacted. There is a reason Homeland Security has
>> invested heavily in HF capability.
>> On 2/13/12 10:42 AM, Glenn Little wrote:
>>> When the disaster hits, and the priorities assigned to the cell
>>> phones eliminate the public, will the public still get alerts?
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