[pskmail] Re: pskmail at 2000 bps using RFSM 2400
- From: "karel Fassotte" <karel.fassotte@xxxxxxxxx>
- To: pskmail@xxxxxxxxxxxxx
- Date: Tue, 23 Jan 2007 14:07:23 -0500
Hello Per and others,
Yes the field we are working in is realy very interesting. We are the
only ones (fools), covering all terrains of interest.
Radiobroadcasting, wireless-access, VHF and UHF communications. Most
of the work we do is wireless in relation with developent. Thats the
focus. Wireless shortwave access is one of the solutions, because vast
aereas do not have sufficient infrastructure, to build wireless,
highspeed links and access points. At this moment we combine, ADSL,
where available, and sattelite access, where needed with a high speed,
(wifi) wireless back bone (54Mbs, airspeed) at 5.8Ghz. with high gain
parabolic antenas, accesspoints and clients at 2.4Ghz. with sector
and panel antennas. The problem for us is that mainly for development
its still costly so not very much money is available. We could use
some more. Our strategy to get connectivity to the poor rural areas is
very simple. Development will never occure without communications and
participation. We install networks for thirdparties, like
creditorganisations, radio stations, government, and let them share
bandwidth with organisations like schools, farmer organisations,
fare-trade and others that are not ecenomicaly feasinable. The
security is simply handled by subnet encryption.
Wireless bandwidth is mostly abundant, the links provide throughput of
more than 47Mbs, also over quite large distances of more than 50 km,
whereas the internet connectivity is no more than 1Mbs. Most traffic
is Internet traffic, because all use the Yahoo fools stuff,
staturating bandwith with unneccesary mail traffic. Anyway please have
look at our WEB site if interested in our work. Its only in spanish up
to now (I dont have time to make an english site)
http://www.oftelsat.com:2082
At this moment we use the RFSM2400 milstd 188-110a in another way to
garantee access and throughput, no mail yet. We simply hookup the
directory RECEIVED used by the RFSM as a common directory, that can be
seen by the other radios remotly, and by opthers via intenet, using
our FTP server that uses this common directory. In this way others in
the internet may access and exchange the files also. Having a mail
service integrated, would complete the implementation. We donot feel
the bandwidth broad enough to sustain WEB access, if only textbased
WEB.
Thanks Per, if there are some more interested out, please give it a try.
greetings
Karel Fassotte
HC1AKP / PE2KFA
2007/1/23, Per Crusefalk <per@xxxxxxxxxxxx>:
Hi Karel,
Yes, two soundcards seems to be needed. It appears that wine has a problem
with full duplex in the way that RFSM wants to use it. Also, I have
various levels of success with my PC's. Some work pretty good and others
just crash.
I have made pskmail send connect frames using RFSM but I have only one PC
that likes RFSM and wine so I can't test the entire system.
Lots of interesting info in your email, sound like you are having a lot of
fun there. Regarding the other waveforms I would love to see PSK256 in
fldigi, is that only available in MixW at the moment or is it supported by
other software ?
73 de Per, sm0rwo
> Thanks Per, we will have look into this. I remember that tha last
> time you wrote about it, you mentioned that 2 soundcards were needed.
> Is that so?
> Deed you have any experiment using the RFSM dumpterminal? as you
> mention in your mail.
> Anyway we will give it a try, although we are very busy this year
> starting up business in Ecuador. Connectivity is a hype overhere and
> we are working on severel connectivity proyects in the rural area.
> PSK125 and if possible PSK256 and PSK2400 are exelent candidates for
> emergency communications. We first want to setup a network trying all
> modes and than as second step offer this communications modes to Civil
> defence, Red Cross and others. We have in mind to make one pilot
> emergency vehical to have a show example.
> The amateur radio world overhere is very limmited. Nearly everything
> is related to a 40 meter network in voice mode, each morning and
> evening. There is some experimenting with RTTY, but not comming any
> further than using Mixw, or other windows applications. The rest of
> the frecuencies in use are all 2 meter networks, some quite big. We
> have some very high repeater point in the country at more than 4000
> meter (Atacazo) !, Giving a coveradge of more than 200km radius. 20
> repeaters are interconnected resulting in a nationwide (mobile)
> network.
> We now started with some amateurs on using other digital modes and
> hope that the introduction of PSKmail, will help to improve the use.
> greetings
> karel
> HC1AKP / PE2KFA
>
> 2007/1/23, Per Crusefalk <per@xxxxxxxxxxxx>:
>> Hi,
>>
>> This is in response to Karels question regarding MIL-STD-188-110A using
>> RFSM2400. Its easy to interface RFSM2400 and PSKmail, here is how:
>>
>> 1. Set RFSM2400 to "dumb modem mode - IPC" within options/modulation.
>>
>> This will make RFSM2400 work like fldigi/gmfsk, it will look for a file
>> within the folder "TRANSEIVE" and transmit that. It will log everything
>> received to the file "alldata" within the folder "RECEIVED"
>>
>> 2. Change the paths that pskmail use to send and receive
>>
>> Within pskmailrc.pl change $output and point that to the filename that
>> RFSM should pick up. For instance
>> $output = ">$ENV{HOME}/.wine/drive_c/Program
>> Files/RFSM2400/TRANSEIVE/rawdata.0";
>> The filename rawdata.0 means to send using 2000 bps and short
>> interleave.
>> Short interleave is 1.2 seconds for commercial modems, don't know how
>> long
>> it is in the modified mode.
>>
>> Change $Inputfile to point to the alldata file within RECEIVED, for
>> example:
>> $Inputfile = ">$ENV{HOME}/.wine/drive_c/Program
>> Files/RFSM2400/RECEIVED/alldata";
>>
>> 3. Run and have fun
>>
>> When you start RFSM2400 it will remove the file alldata so perhaps you
>> need to create it, for example with "touch alldata" within that folder.
>> You may have to experiment with interleaver and speed settings, timing
>> in
>> pskmail is not optimised for these speeds.
>>
>> 73 de Per, sm0rwo
>>
>>
>> > Altough we have our PSK125 mail station nearly ready in Ecuador. We
>> > tested very intensly the capability of the RFSM2400 188-110 a modem
>> > software.
>> > We are no very convinced that the protocoll is very persistant and
>> > able to get good troughput under very advers conditions. In QRM
>> > conditions the modem gets file sizes though that are realy remarkable.
>> > 10KB is easy. Especialy because the modem is negociating all the time
>> > keeps throughput good.
>> > Using 7045 USB all day and night gives nearly 24 hour service.
>> > Per and others, especialy for emergency traffic, if there would be any
>> > possibility to integrate such a modem in the PSKmail series it would
>> > be realy great.
>> > greetings
>> > Karel Fassotte
>> > HC1AKP
>> >
>> >
>> >
>> > 2007/1/22, Rich Hudgins <rhudgins@xxxxxxxxx>:
>> >> This has raised a point that I have thought about some and would like
>> to
>> >> comment on. First during Hurricane Rita it would have been of first
>> >> importance to be able to send either email or simple text messages
>> >> between clients. This would allow some sort of message form to be
>> >> followed. Second store and forward should be implemented between
>> >> clients in the same sort of autonegotioate mode that mesh networking
>> >> uses. That is if one of the clients on the air in the self forming
>> net
>> >> has a connection to an internet server then all mail is forwarded to
>> >> that station. To do this first all stations on the common frequency
>> >> would have to recognize each other and also who everyone can talk to
>> as
>> >> well as build a simple path [route] to each client. Something like
>> that
>> >> would be of great usefulness in an emergency. If each station builds
>> a
>> >> route list for the stations it hears and assigns a route index based
>> on
>> >> the amount of retries and broadcasts this list periodicaly then the
>> >> rest would be straight forward.
>> >> Rich Hudgins N5ale
>> >> Ps I know its not as easy as I make it sound but it would be the
>> first
>> >> dynamic network on HF that I know about.
>> >>
>> >> -----Original Message-----
>> >> From: pskmail-bounce@xxxxxxxxxxxxx
>> [mailto:pskmail-bounce@xxxxxxxxxxxxx]
>> >> On Behalf Of Rein Couperus
>> >> Sent: Monday, January 22, 2007 2:06 PM
>> >> To: pskmail@xxxxxxxxxxxxx
>> >> Subject: [pskmail] BBS for emergency communications
>> >>
>> >>
>> >> I have been looking into a BBS for adding to pskmail, to help those
>> who
>> >>
>> >> * have no internet connection for the server
>> >> * are forbidden to connect a radio to the internet (France)
>> >> * are setting up emergency comms for cases when a large slice of the
>> >> internet is down and there is no possibility to reach an HF gateway
>> with
>> >> running internet.
>> >>
>> >> Of course I have been shopping for something useable which is
>> existing
>> >> and alive. I have found only 2 cases of BBSes which are still in
>> >> development/maintenance, and they are both german. The rest is either
>> >> dead or DOS. (The last update of F6FBB BBS was in Jan, 2003).
>> >>
>> >> The best is probably the one from the Baycom group in Munich, called
>> >> OpenBCM.
>> >>
>> >> But all these are cosmic solutions covering everything, the universe
>> and
>> >> the neighbours'cat. These BBSes are a nightmare to configure, and you
>> >> need 2 people to run one. Moreover, the whole infrastructure these
>> BBSes
>> >> use is dying quickly. In PA0 land the packet backbone has died,
>> >> the local city node in Eindhoven has 1 packet link and 7 internet
>> >> tunnels. And the group of AX25 users has gone down from 85 to 4.
>> >>
>> >> The main concern I have is that it is all based on a fixed
>> >> infrastructure, and I am sure what is needed in an emergency
>> situation
>> >> is ad hoc. The number of volunteers maintaining these systems is
>> getting
>> >> less in numbers, and the freaks running the infrastructure only talk
>> >> amongst themselves.... Technical development has stopped. We are
>> still
>> >> looking at 9600 bd ax25 links. An on 30m you can hear the wonders of
>> a
>> >> full-fledged HF APRS network running with 300 Bd AFSK digipeaters!!!
>> >>
>> >> If we are then talking about voluntary resources, I think we need
>> much
>> >> more basic stuff which is very much automatic and can be set up in an
>> >> easy but flexible way depending on circumstances.
>> >>
>> >> I had sworn I would not get involved in all this, but maybe it is
>> worth
>> >> getting started up. I have a nice test bed at the university of
>> >> Eindhoven, who host a pskmail server AND a packet BBS (F6FBB).
>> >>
>> >> One of the first things we need to know is, what is the minimum
>> >> functionality of such a BBS?
>> >>
>> >> To kick the ball off, I would say:
>> >> * Storage of mail not deliverable via internet (immediate delivery in
>> >> case of internet connection)
>> >> * Store/forward of mail to a destination BBS via a HF link
>> >> * User interface via Kmail or Evolution (POP3 interface)
>> >> * Capability to send scheduled bulletins
>> >> * Built in web server so people can also look at the mail locally (at
>> >> the server location, which may be a command post of some sorts) via a
>> >> connected LAN with a laptop
>> >>
>> >> This must be especially targeted at the emergency comms, as we have a
>> >> satisfying working solution for normal situations.
>> >>
>> >> Ideas are welcome.
>> >> Scenarios are welcome.
>> >> Resources are even more welcome.
>> >>
>> >> 73,
>> >>
>> >> Rein PA0R
>> >>
>> >>
>> >> --
>> >> http://pa0r.blogspirit.com
>> >>
>> >> --
>> >> No virus found in this incoming message.
>> >> Checked by AVG Free Edition.
>> >> Version: 7.5.432 / Virus Database: 268.17.4/643 - Release Date:
>> >> 1/21/2007 5:12 PM
>> >>
>> >>
>> >> --
>> >> No virus found in this outgoing message.
>> >> Checked by AVG Free Edition.
>> >> Version: 7.5.432 / Virus Database: 268.17.5/645 - Release Date:
>> >> 1/22/2007 4:10 PM
>> >>
>> >>
>> >>
>> >>
>> >
>> >
>>
>>
>>
>
>
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