[App_rpt-users] Parallel 900MHz Links

[Kevin Custer]

On 2/8/2014 12:04 AM, Operations - K6ECS wrote:
> But if the Internet or Intranet go down how can
> we have a parallel network when Allstar is using the I/O's on the Motorola
> MSF 5000?

You wouldn't do it that way.

> Talking about it earlier we thought of using a DTMF controller with relays
> or solid state switching to so that we can disconnect Allstar and switch to
> the link system. But is there an easier way? This would be for a last ditch
> effort at maintaining repeater control and linked audio.

Depending on your hardware, you can have several radios connected to the 
same AllStar box.  There is no need for relays and more complication.
Set up a remote base radio connected to the AllStar box.  If the 
Internet goes down, link the repeater to the network with the remote 
base radio.

-  -

Going down a different path, that isn't LOS:
There are at least two companies making wifi cards for your favorite 
wifi router boards (RouterBoard - StarOS - Ubiquiti, etc.) that operate 
in the 420 - 450 MHz area.  They are 5 MHz wide compatible (channel 
splitting - cloaking).  I'm not saying you should use them as it *may* 
not be within the FCC rules for the US, but they are available.  Please 
don't turn this into a "FCC rules" or "proper use of bandwidth" thread.

http://www.xagyl.com/store/product.php?productid=16450
http://www.doodlelabs.com/products/radio-transceivers/sub-ghz-range/420-450-mhz-dl435-30/

Kevin