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3194 discussions

Making Packet Node with Pi ?
by R P 05 Mar '16

05 Mar '16

Hi there Is there a way to have a Packet Node with Pi (or any other small size solution that will not require a PC) ? If yes How do I connect TNC (serial port) to PI is the Pi support USB to serial external interface (like the profilic ones) ? Or (preferred) something can be done to do the TNC on Sound card (can be an External sound card that connect to the USB of the PI) Please Advice Thanks Forward Ronen - 4Z4ZQ jttp://www.ronen.org

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Re: [44net] STAs
by Steve L 05 Mar '16

05 Mar '16

For anyone interested in considering a STA you should go to this site: https://apps.fcc.gov/oetcf/els/forms/STANotificationPage.cfm STAs are only good for six months, but they can be extended by filing another application. The filing fee is $60, and you will need your FRN and password to file it. It is not a simple process, but it is doable. You should have a narrative explanation of what you propose to do in PDF format to upload as an attachment as well as filling out the form completely. ________________________________ >Is this how STAs now work? > >When we were implementing packet radio in Canada in the late seventies, >American hams claimed that the STA process was slow and difficult, the >equivalent to getting an act through Congress that was difficult and slow > >Was this real at the time? Is it better now? > >I may have to go through this to push a new mesh protocol through as STA >(yah, gotta do my local exams first!) and what to know what I'll be up >against. > >- Richard > > >On 3/4/16 10:30 PM, ve1jot wrote: >> (Please trim inclusions from previous messages) >> _______________________________________________ >> +1 >> >> On 16-03-04 08:16 PM, kd6oat wrote: >>> (Please trim inclusions from previous messages) >>> _______________________________________________ >>> Regarding an STA for higher data rates experimentation: I would think a >>> well written proposal accompanied by the signature of a number of >>> licensed >>> operators willing to participate in experiments would go a long way. >>> Count >>> me in as one who would be willing to sign on. >>> Ken - KD6OAT >>> >>> On Thu, Mar 3, 2016 at 11:22 AM, Brian Kantor <Brian at ucsd.edu> wrote: >>> >>>> (Please trim inclusions from previous messages) >>>> _______________________________________________ >>>> In the FCC arena, one of the better ways to get technical restrictions >>>> removed is to apply for and operate under an STA - Special Temporary >>>> Authority, a document from the FCC that basically allows you to operate >>>> an exception to the normal rules. Typically the only requirement is >>>> that you make a good case for it technically and that you write up a >>>> report afterwards. In the past, STAs have been the basis for >>>> changes to >>>> the rules. Someone who writes well may want to consider submitting >>>> one to >>>> allow higher data rates based solely on bandwidth and then >>>> experimenting >>>> with it. >>>> >>>> Another possibility is to apply for a Experimental Radio Service >>>> license >>>> which basically allows you to do just about anything if you can make a >>>> good case for it. They used to be a little expensive and they require >>>> a written report on what you found out with your experiments but it >>>> does >>>> allow nearly anything you can think of. >>>> - Brian

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TNC-Pi
by Rob Janssen 04 Mar '16

04 Mar '16

> Beyond what others have mentioned like the TNC-Pi (nice kit), using a $7 > USB soundcard and Direwolf will provide superior decodes. Yes, I wonder why on earth they use a hardware AFSK modem chip in that design... I can see a place for an adapter board that provides PTT keying, possibly isolated audio interface, etc for the Pi, but it should always just do A/D and D/A conversion of the audio and leave the processing to software. That works so much better, and it enables the development of alternative modem designs without having to change the hardware every time. Rob

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Symbol rate
by Steve L 03 Mar '16

03 Mar '16

There were some attempts/news a couple years ago to modernize this: http://www.arrl.org/news/arrl-files-symbol-rate-petition-with-fcc http://www.arrl.org/news/arrl-s-symbol-rate-petition-nears-top-of-fcc-s-mos… The problem is it takes a very long time for the FCC to act on pretty much anything ham radio related. It took 3 years for the Mototrbo/TDMA rule change. Prior to that I recall the spread spectrum automatic power control rule change took about half that. I agree though, a STA is a good idea to make a case and bring the issue to the forefront. >In the FCC arena, one of the better ways to get technical restrictions >removed is to apply for and operate under an STA - Special Temporary >Authority, a document from the FCC that basically allows you to operate >an exception to the normal rules. Typically the only requirement is >that you make a good case for it technically and that you write up a >report afterwards. In the past, STAs have been the basis for changes to >the rules. Someone who writes well may want to consider submitting one to >allow higher data rates based solely on bandwidth and then experimenting >with it. > >Another possibility is to apply for a Experimental Radio Service license >which basically allows you to do just about anything if you can make a >good case for it. They used to be a little expensive and they require >a written report on what you found out with your experiments but it does >allow nearly anything you can think of. >- Brian > > >On Thu, Mar 03, 2016 at 07:42:09PM +0200, Demetre - SV1UY wrote: >> Not good for US though, "thanks" to FCC's 300baud symbol rate restrictions of HF.

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DROWN attack
by Rob Janssen 03 Mar '16

03 Mar '16

portal.ampr.org and www.portal.ampr.org are listed (as the only hosts in ampr.org) as vulnerable to the DROWN attack published today. it is not a high-priority issue but it is a good idea to have a look and fix the software and/or settings. Rob* *

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Re: [44net] Making Packet Node with Pi ?
by Assi Friedman 02 Mar '16

02 Mar '16

High speed packet radio collapsed at 9.6 kbps because hams were no longer able to hack modems into surplus land mobile radios. For the first time, one needed full channel equalization and plug and pray no longer worked. That was pretty much the end of packet radio circa mid 1990's. The only thing that survived was APRS which is based on cheap land mobile radios, PIC microcontrollers, and AX25/UI. Assi kk7kx -----Original Message----- From: 44Net [mailto:44net-bounces+assi=kiloxray.com@hamradio.ucsd.edu] On Behalf Of Mark Phillips Sent: Wednesday, March 02, 2016 2:19 PM To: AMPRNet working group <44net(a)hamradio.ucsd.edu> Subject: Re: [44net] Making Packet Node with Pi ? (Please trim inclusions from previous messages) _______________________________________________ According to the TNC-X website, John Hansen claims to be working on a 9K6 modem but that was quite a few years back and nothing has been heard since. I'd LOVE a 9K6+++ modem but they just don;t seem to be available. I've looked at quite a few of the old designs that came out of German and Slovenia back in the late 90's and early 2K's. They are either no longer available, require an SCC card to provide clocks etc, have no driver support any more or require firmware which is unavailable. Whilst the soundcard road is somewhat acceptable, a hardware modem can't be beat.. Mark NI2O/G7LTT

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Re: [44net] Making Packet Node with Pi ?
by Assi Friedman 02 Mar '16

02 Mar '16

A few notes: 1) There is a TNC board for the RPi: http://tnc-x.com/TNCPi.htm and it supports stacking multiple TNCs on a single RPi. It's a pretty elegant solution. 2) The RPi has UART pins on the I/O connector. All you need is a RS232 to LVCMOS level converter. The only disadvantage to that is that you can only connect a single TNC unless you go to NETROM firmware on the TNCs. 3) Using USB<->RS232 converters should work but do yourself a favor and avoid any adapter that is based on the Prolific chipset. The number of fake Prolific devices on the market is unreal and their drivers are very suspect. Use FTDI based devices as they have done a good job of protecting their IP and maintaining a stable driver set for Windows and Linux. Assi kk7kx -----Original Message----- From: 44Net [mailto:44net-bounces+assi=kiloxray.com@hamradio.ucsd.edu] On Behalf Of R P Sent: Tuesday, March 01, 2016 10:25 PM To: AMPRNet working group <44net(a)hamradio.ucsd.edu> Subject: [44net] Making Packet Node with Pi ? (Please trim inclusions from previous messages) _______________________________________________ Hi there Is there a way to have a Packet Node with Pi (or any other small size solution that will not require a PC) ? If yes How do I connect TNC (serial port) to PI is the Pi support USB to serial external interface (like the profilic ones) ? Or (preferred) something can be done to do the TNC on Sound card (can be an External sound card that connect to the USB of the PI) Please Advice Thanks Forward Ronen - 4Z4ZQ jttp://www.ronen.org

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Wiki page text format problem
by R P 02 Mar '16

02 Mar '16

Hi there Is anyone know why the Wiki Page behave different then a regular notepad or Wordpad ? The problem is mainly when i publish scripts it look different then it look if i see it in a notepad Please Advice Thanks Forward Ronen - 4Z4ZQ http://www.ronen.org Ronen Pinchooks (4Z4ZQ) WebSite<http://www.ronen.org/> www.ronen.org ronen.org (Ronen Pinchooks (4Z4ZQ) WebSite) is hosted by domainavenue.com

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Network Monitor Of Gateways ?
by R P 01 Mar '16

01 Mar '16

Hi There Is there any Network monitor tool (like WhatsUp Gold) or HP Openview ) that someone run and monitor all the Gateways ? and available for the public to see the network status ? Long ago telneting to UCSD router to some port return status of ping to all the Gateway Any Way Im running WhatsUpGold for my purposes and u can add (if needed ) Gateways to monitor It can Even send Email of events like Down Up and much more it can be seen here http://4z4zq.no-ip.org:81/whatsup1.wup.cgi It require login name and password Just leave them blank This is what left from our Network that was working long ago hope soon it will return to operation About the Project Can be read here http://www.qsl.net/4z4zq/wlan.html 73;s<http://www.qsl.net/4z4zq/wlan.html> Ronen - 4Z4ZQ<http://www.qsl.net/4z4zq/wlan.html> <http://www.qsl.net/4z4zq/wlan.html>http://www.ronen.org Ronen Pinchooks (4Z4ZQ) WebSite<http://www.ronen.org/> www.ronen.org ronen.org (Ronen Pinchooks (4Z4ZQ) WebSite) is hosted by domainavenue.com <http://www.qsl.net/4z4zq/wlan.html> The Wireless Lan Project page - QSL.net<http://www.qsl.net/4z4zq/wlan.html> www.qsl.net For the Commercial companies. You have a wireless lan cards/equipment that you want to test ? we are ready to make cooperation on a NON PROFIT base

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Re: [44net] Network Monitor Of Gateways ?
by Rob Janssen 01 Mar '16

01 Mar '16

> Is making 3Pings to about 400 Gateways worldwide from non AMPR IP to their AMPR ip every 5 minutes consider acceptable thing to do ? Please do not perform any coninuous monitoring or other probing of any other networks than your own without the explicit desire and consent of the operators of the other network. We are blacklisting all sources of unwanted monitoring and probing traffic like research scanners, shodan.io etc etc and I regularly send opt-out messages to those. Still we get over 1 megabit/s of such crap all day. Rob

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