Re: [44net] hardware vs. software

K7VE - John <john@...>


I don't have time right now to test, but JNOS2 compiles from source on the UDR56k-4 as does jnosinstaller.  The installer configures the program just fine.

Barring any unforeseen issues, you should be able to run JNOS directly on the radio.  If you have TNCs servicing local LANs (e.g. 2 meters, 220, ...), you can put USB-to-Serial interfaces on the UDR56k-4 and attach the TNCs with their current radios. No other computer would be required.  We have tested TNCs attached in this manner on other applications for over a year (daily).  The four UDR56k-4s would form your backbone radios.  AX.25 drivers are already in place to drive the UDR56k-4 at any supported speed including 9600-baud to over 56k baud (with some steps in between).  You would use a CIDR of /29 if these were the only radios on your backbone LAN.

This is an open architure/system so bring your favorite applications (Linux source or Linux ARMEL binaries) to the radio.  If your application is more appropriate to run on another computer, use the UDR56k-4 as a relay device, using an IP interface (wired or wireless).

Further discussion on the UniversalDigitalRadio forum on Yahoo! Groups.

John D. Hays
PO Box 1223, Edmonds, WA 98020-1223 

On Sat, Jul 6, 2013 at 9:15 AM, Michael E. Fox - N6MEF <n6mef@...> wrote:
(Please trim inclusions from previous messages)

I'm glad you're on this list.  Didn't realize that.

I've look and found no "solution" oriented documentation -- i.e. how can I
use the device?  All of the information about the internals, like "socket
interfaces" may have meaning for some.  But, since I don't write protocol
internals, it doesn't help me understand the deployment scenarios.

For example, assume I have four JNOS systems that are currently connected to
each other on a single subnet using a single 440 frequency.  They talk to
each other using IP over AX.25.  I would definitely like to increase the
speed.  But it's not clear to me how I would deploy the UDR56K-4 to replace
the existing 440 radios/TNCs.  What protocol would it run, at what speed?
What would the IP network diagram look like?

If this question is not appropriate for the 44-list, we can move it to your
yahoo group.

Thanks much,

-----Original Message-----
[] On Behalf Of K7VE -
Sent: Friday, July 05, 2013 11:02 PM
To: AMPRNet working group
Subject: Re: [44net] hardware vs. software

(Please trim inclusions from previous messages)
BTW -- the modems in the UDR56k-4 are DSP to I/Q modulation/demodulation and
run on the included Linux card.  The intent is to have flexibility in
modems, protocols, and applications and provide an open source environment
for the experimenters in the user community.

The modems, and protocol stacks, will be available on socket interfaces, so
protocols and applications may run either on the radio's embedded system or
via interconnection to another host.

By having on-board processing we also are looking at very low tx/rx
turnaround time,  well below what could be done on a USB or serial port.

One application is using the device as an 'Ethernet Bridge' within a given
protocol, modem, and data rate.

Oh, and the price is a 3rd less than Bill posted :)

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