[Re: [Asterisk-Users] civil emergency comms: Asterisk + HAM]]

[Derek Whitten]

-----Forwarded Message-----
From: IEG <dennis.andring at gmail.com>
To: derek at kfuq.net
Subject: Re: [Fwd: Re: [Asterisk-Users] civil emergency comms: Asterisk
+ HAM]
Date: Tue, 13 Sep 2005 03:04:42 -0700

The answer is a multiplexed terminal node controller (TNC) This was the
very thought behind "trunked" communications around 800mhz. Gee ...
there are a bunch of cell phone frequencies just above that and 3x800 =
2.4g and ....
I'll leave the possibilities to the imaginative reader 



On 9/9/05, Derek Whitten <derek at kfuq.net> wrote:
        -----Forwarded Message-----
        From: Mike M <no-linux-support at earthlink.net>
        To: asterisk-users at lists.digium.com
        Subject: Re: [Asterisk-Users] civil emergency comms: Asterisk +
        HAM
        Date: Fri, 09 Sep 2005 10:26:09 -0400
        
        On Fri, Sep 09, 2005 at 01:46:57PM +0100, Peter Bowyer wrote:
        > On 09/09/05, Mike M <no-linux-support at earthlink.net> wrote:
        > > On Thu, Sep 08, 2005 at 07:28:34PM +0000, Mike Hemstock
        wrote:
        > > > On Tuesday 06 September 2005 15:27, Mike M wrote:
        > > > >
        > > > > Imagine what a network of systems composed of Asterisk,
        ham radio, wifi, 
        > > > > generators, batteries, and a reserve of fuel could have
        done for the
        > > > > Gulf coast.  I have all of the components above except
        the ham radio.
        > > >
        > > > That's a very interesting idea. 
        > >
        > > I've initiated a request to join my local amateur radio
        yahoo group.
        > > I'm going to see if I can enlist help to demonstrate this
        idea.
        >
        > The concept of combining VoIP and ham radio is by no means new
        - there 
        > are many skype-a-like systems around which are used as links
        or user
        > access to the existing ham repeater network. I don't know of
        any using
        > Asterisk, though.
        
        I think this architecture has value: 
        
        PSTN---asterisk---voip---radio===+==radio--voip--asterisk---POTS
                                         +==radio--voip--asterisk---POTS
                                         +==radio--voip--asterisk---POTS
        
        and this too:
        
        voip svc prvdr----voip---radio===+==radio--voip--asterisk---POTS
                                         +==radio--voip--asterisk---POTS
                                         +==radio--voip--asterisk---POTS
        
        POTS at the emergency end is good because it's familiar, simple,
        cheap,
        and runs on a central power source.  I don't know radio
        equipment so I
        don't know if the upstream radio can multiplex streams onto
        different 
        frequencies.
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