[App_rpt-users] DMR sandbox

[David McGough]

Hi Everyone,

The "problem" with DMR and other digital repeaters (D-star, etc.) is that
getting these repeaters running optimally may *not* just be a "install it
and it works" situation!

All the standard issues found with analog repeaters (e.g.: receiver 
desense, intermod, antenna pattern problems) are found with digital 
systems, too.

The skillset required to debug the digital systems and get them running
optimally is complex--more complex than for analog systems, in my 
experience--you can tell a LOT about a system problem from analog noises 
heard coming through the repeater. You don't have this luxury with 
digital-only systems!  Oddball digital problems can be very challenging to 
resolve!

Just my $0.02.

73, David KB4FXC


On Fri, 23 Jan 2015, Bryan D. Boyle wrote:

> actually, getting on dmr-marc is incredibly simple to install.  
register the node, get the upstream address and encryption key, plug in, 
hook up power, net, duplexer, follow the screen shots as to which tab and 
box to fill in, save to repeater, and it's up.  if you have all the info, 
takes a half hour.
> 
> it's meant for commercial. not lots to diddle with.  and it just works, 
so even a clueless individual can use it.  
> 
> as 'flexible' as allstar?  no.  but considering the market it came 
from, flexibility breeds unreliability.  dmr was meant to work, not be a 
development platform.
> 
> two different realms of operation.  
> --
> Bryan
> Sent from my iPhone 5...No electrons were harmed in the sending of this message.
> 
> 
> 
> > On Jan 23, 2015, at 16:48, Doug Crompton <doug at crompton.com> wrote:
> > 
> > I think this is a perfect example of how good the Allstar network is, 
open source and so easy to use. Most of these digital (SMR, Dstar, etc.) 
Internet connections are so much more convoluted than what we have here. 
Until it gets sorted out, if it ever does, I am thankful for what we have!!! 
> > 
> > 73 Doug
> > WA3DSP
> > http://www.crompton.com/hamradio
> > 
> > 
> > From: bdboyle at bdboyle.com
> > Date: Fri, 23 Jan 2015 11:35:57 -0500
> > To: N1XBM at amsat.org
> > CC: app_rpt-users at ohnosec.org
> > Subject: Re: [App_rpt-users] DMR sandbox
> > 
> > DMR-MARC is a batwing-supported network, so they have linited it to mototrbo repeaters as the infrastructure.  
> > 
> > Not that it is without issues, but since the IP site connect is proprietary and the network is informally supported by moto employees , i guess they can do with it what they want.
> > 
> > You can gen a hybrid repeater (dmr/analog with the proper entitlement key...$$), but loose the ip site connect to get the analog signals out the back of the box, or spend the $$ to get a c-bridge to link stuff together cross-protocol. 
> > 
> > either way, with the differences in quality of the signals, bandwidth differences, etc, i can see why MARC has limited and sandboxed it.
> > 
> > I bought a 440 XPR8400 a while ago and put it up on the MARC network.  Lost interest and gave it to the fellow who gave me the space in his shelter to do with what he wanted.  Neat technology, but mostly the same as asterisk networks, but it's reaching the 'endless september' atmosphere (google it for a fuller explanation)
> > 
> > 
> > --
> > Bryan
> > Sent from my iPhone 5...No electrons were harmed in the sending of this message.
> > 
> > 
> > 
> > On Jan 23, 2015, at 10:54, Robert Newberry <N1XBM at amsat.org> wrote:
> > 
> > Anyone doing anything with this DMR sandbox? If I read it right it does not provide access to the DMR-MARC. Although maybe if your part of the sandbox that's a sub network? I see they specifically mention Allstar.
> > 
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