[MVMA] Winlink: Global Radio Email

[William Curtice]

To Chuck:

 

I’m just now getting to reading…. And thinking about… mesh email that goes back about a month.  Hopefully,  you will see responses to things that caused you to wonder if I had died some weeks ago.

 

Relative to your comment below:

 

I do not  see the point of using half/duplex for Winlink.    Half-duplex or simplex, a minimalist station must STILL make a connection to the Winlink RMS station.   The ONLY function of the RMS Station, is to allow an RMS client to connect to the RMS Server.  Using a half/duplex repeater would only serve to double the bandwidth consumed … to achieve the identical function.  It would also raise expense required in terms of diplexers, control circuits, etc.     Fundamentally, an RMS server is a very simple system; a mobile transceiver with power supply, a TNC, and a Computer.  Swap the TNC for a Soundcard interface (Signalink) if you wish, and use a software TNC.   

 

I believe going to half-duplex WOULD make sense if  you were to use the Winlink station as a REPEATER.  Then, offering half-duplex as an alternative to using the Winlink Packet station  as a digipeater… would make some sense.    In our case, the digipeat option is disabled.  It might make sense to allow the RMS Station to serve as a digipeater….. to cover the situation when our Internet connection goes down.  In that case the KAS Winlink node could relay traffic to other Winlink RMS servers in the area, that would be out of range for the minimalist stations. But again, having it operate half-duplex would only serve to double the bandwidth consumed.

 

My thoughts

 

Bill

 

From: mvma-bounces at mailman.qth.net [mailto:mvma-bounces at mailman.qth.net] On Behalf Of Chuck Gelm
Sent: Wednesday, August 22, 2018 8:33 AM
To: Maurice Riggins via MVMA
Subject: Re: [MVMA] Winlink: Global Radio Email

 

 

On 08/22/2018 08:00 AM, Maurice Riggins via MVMA wrote:

 If Winlink is a viable and worthwhile communications scheme,
should it be using a repeater instead of simplex?

 

I don’t know much about AX.25 but I know you have a lot of packet experience.

Yes. It is so sad to see the same mistakes from packet radio in the 1980s
repeated in other technologies in the 3rd millennium. 
Ignorance can be reduced, stupid cannot be reduced.



 

Would full duplex be important with that?


VHF/UHF repeaters are half-duplex. 
The advantage is coverage of minimal stations; HT, Mobile, Portable(EMCOMM?), or
home stations with antennas < 100' AGL. ;-)


Chuck

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