[asterisk-users] RF to IP bridge

[Curt Shaffer]

Half duplex is not an issue. Basically the idea is radio over IP. I don't
want to change the fact that we are using radios. For example, on an
enterprise level I'm going to be working with a crew to set this up for our
Avaya system. It is basically for emergency communications. Say the fire
chief is out of town and something major happens. We would like for him to
be able to call in and hear and interact with the squad on site via the
radio network from the PSTN or even a cell phone. With
http://www.twistpair.com/ this is completely possible but that only
integrates with Avaya or Cisco Call Manager at this time. Not a problem as
we run Avaya on an Enterprise level but I'm looking for free or cheap
alternatives.

Another example and more towards what I am looking at. As a RACES (Radio
Amateur Civil Emergency Service) member I would like to have a "crash cart"
that would allow instant ability for communications on a range of mediums.
GSM cards, EVDO, WIFI, and radio communications all from a small box that
can be very mobile and run on something like a gel cell batteries. The
ability to bridge between the two would be very useful in cases of disperse
conditions where every RACES member could be offering communications to
victims outside of net repeaters or have another medium to get back into the
tactical net rather than having to utilize repeaters out of the range of the
net control.

We have internet controlled repeaters and utilize VoIP on a lot of them but
we are looking for something that can be small, very mobile and offer other
services other than just radio communications.

And just FYI the ~$200/channel is for the above named software that does
just what I'm explaining. 

Curt

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Mark
Coccimiglio
Sent: Thursday, May 31, 2007 6:11 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] RF to IP bridge



Per Jessen wrote:

>Radio-amateurs have done phone-patching for decades (where allowed) -
>there must be someone who can point you in the direction of an easy
>solution.
>
>
>/Per Jessen, Zürich
>
>  
>
The BIG problem here is that most Radio Amateur software and hardware 
operate in a half-duplex manner.  I don't think that would be what you 
want.   If half-duplex is ok then most radio makers (Icom, Motorola, 
etc.) have complete turn-key solutions.  If you want it "cheap" then 
your will have to "build it yourself".  I don't see <$200/channel 
happening in either case for VHF/UHF.  Please share more info and maybe 
I can help.


Mark C  ( N3WHX )
n3whx at amsat.org
sip:293625 at fwd.pulver.com  (VoIP)
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