[App_rpt-users] Micro-Node RTCM

Mark Guibord mark at micro-node.com
Wed Apr 26 02:08:28 EDT 2017


Yes the RTCM can be used behind a firewall and does not require any port forwarding for normal operation. There is a telnet console for configuration and if you want to configure the RTCM remotely you will need to forward that port.

 

From: App_rpt-users [mailto:app_rpt-users-bounces at lists.allstarlink.org] On Behalf Of Doug Kingston
Sent: Tuesday, April 25, 2017 10:54 PM
To: Users of Asterisk app_rpt
Subject: Re: [App_rpt-users] Micro-Node RTCM

 

Thank you Mark, that was very informative.

 

My guess is that this device is unlikely to be able to "defend" itself very well and should probably be placed behind a restrictive firewall.  Do you concur?

 

-Doug-

 

On Tue, Apr 25, 2017 at 10:26 PM, Mark Guibord <mark at micro-node.com> wrote:

The RTCM uses a 16 bit DSP with a tightly integrated interrupt driven firmware package written in c 

 

http://www.microchip.com/wwwproducts/en/dsPIC33FJ128GP804

 

If you're interested here is a link to the open-source software for the RTCM.. 

 

http://svn.ohnosec.org/viewvc/projects/allstar/voter/board-firmware/?root=svn

 

From: App_rpt-users [mailto:app_rpt-users-bounces at lists.allstarlink.org] On Behalf Of Doug Kingston
Sent: Tuesday, April 25, 2017 9:41 PM
To: Users of Asterisk app_rpt
Subject: Re: [App_rpt-users] Micro-Node RTCM

 

I know that I would have a GPS with 1pps feed to get the timing.  Once you have that, what is different in an RTCM other than nice packaging?

What is the core processor technology inside the RTCM.  I am assuming is some form of ARM processor.  Can you can you get a root shell and use SSH to access?

 

-Doug-

 

On Tue, Apr 25, 2017 at 7:50 PM, Fredric Moses <fred at moses.bz> wrote:

You seem confused… you still need a linux system running app_rpt with the RTCM’s…  think of the RTCM as an ethernet based radio interface vs usb.. But that radio interface when you add GPS to each one can do voting with others.. and with some more work simulcast transmitting…

We have some 50-60 RTCM’s deployed and love them… Getting ready to rebuild another clubs VHF repeater voter system with a 6 site RTCM based voting system.  I just started testing the new hamvoip rPi3 image with some rtcm’s myself...

--
Fredric Moses - W8FSM - WQOG498
fred at moses.bz


> On Apr 25, 2017, at 22:32, Doug Kingston <dpk at randomnotes.org> wrote:
>
> I am considering using these for a amateur repeater voting application.  The alternative would be to roll my own with a Raspberry Pi 3 and probably the HamVOIP.org distribution.  Who out there is using the RTCM?  I can find very little information beyond the manual and I am concerned that the software may not be maintained and that there is not enough access to the underlying Linux system.
>
> Who can tell me more about the RTCM?
>
> Has anyone rolled their own with a Pi3?  Any advice there?
>
> -Doug-

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