[sbe-eas] Subject: Re: PEP Stations

[Ed Czarnecki]

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.



-----Original Message-----
From: sbe-eas-bounces at sbe.org [mailto:sbe-eas-bounces at sbe.org] On Behalf Of
W2XJ
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
very long.

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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