[arm-allstar] Full duplex versus simplex

[Jim Darrough]

Hi Doug.

     Thanks so much for your comments, and they clear a lot of things 
up. What I may do is get an older 2m rig to use for received, and 
continue to use my FT-2600m as the transmitter. Either that or do a link 
to my club's repeater via a couple of 900 Mhz rigs.

Appreciate the help!


73 Jim, KI7AY


On 03/06/2018 09:35 PM, "Doug Crompton via arm-allstar" wrote:
> Jim,
>
>    This is very easy minus the RF side of it. To use a FOB with a repeater
> system, that is a separate receiver and transmitter you connect COS and RX
> audio to the receiver and PTT and TX audio to the transmitter.  You only
> need a single FOB. In rpt.conf you set duplex=2  This turns on full duplex
> meaning if the COS is activated it in turn activates the PTT.  There are
> other things that can be set like hang time, timeouts, etc but for the most
> part it is that simple.
>
> You can make a simple local (short range) repeater for you or your
> neighborhood using  two transceivers or a separate receiver and transmitter
> on widely separated frequencies and antennas. A real repeater uses a
> duplexer and a single antenna with standard frequency spacing.
>
> Another option and the way I run one of my repeaters is split site. If you
> have two sites separated by a half mile or so and both ends have Internet
> you can use Allstar to connect them and have a rather simple split site
> repeater.
>
> So the Alstar end is easy, the RF end is up to you. You could use something
> as simple as two Baofeng radios or get really fancy with a commercial
> repeater and duplexer. Also remember if you are going wide area you will
> probably have to get coordinated by your local repeater group.
>
> There are plenty of people on this list using Allstar as a repeater
> controller so I am sure you can get help if you need it.
>
>
> *73 Doug*
>
> *WA3DSP*
>
> *http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*
>
>
>
>
> On Tue, Mar 6, 2018 at 1:29 PM, "Jim Darrough via arm-allstar" <
> arm-allstar at hamvoip.org> wrote:
>
>> At present, my node is set up as a simplex node such that it receives a
>> local signal and sends it over the internet to another node, which then
>> activates a radio (in my case a repeater system). Local users cannot hear
>> what is going over my node unless they are close enough to receive my
>> transmissions directly.
>>
>> In order to act as a full duplex repeater system, I believe I would need
>> an additional radio, or use a dual band rig set up for crossband repeat. As
>> in a real repeater system one will be designated as transmit, while the
>> other simply receives.
>>
>> There is a setting in asterisk /etc/asterisk/rpt.conf that is either
>> duplex=1 or duplex-2.
>>
>> If I decided to put another rig on my system to make it full duplex
>> (obviously on a different frequency), how would the two radios be connected
>> to the URIx, and do I need to do anything with the software other than
>> select duplex=2?
>>
>> 73 Jim KI7AY
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-- 
73 Jim
La ciruela de Panamá