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PA2AGA > HDDIG 20.09.99 23:37l 207 Lines 6896 Bytes #-9773 (0) @ EU
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Date: Mon, 20 Sep 99 18:11:17 MET
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From: pa2aga
To: hd_broadcast@pa2aga
Subject: HamDigitalDigest 99/235F
X-BBS-Msg-Type: B
I'm not sure we want it to be plug and play anyway. If it were, then
we might as well just dial up an ISP and use the wired internet.
A major part of amateur packet radio is in learning how networking
works. We can't do that if we treat it strictly as a black box appliance.
>So perhaps this idea devolves into the political question of how to build
>fast ham radio networks. The solution to date has been to rely on the
>internet for almost all the transport, and not put $ and effort into building
>radio network. I don't see a solution for the network problem.
There probably isn't a solution with a national scope. There are too many
square miles, and too few hams, to make a national packet network viable.
The topology is too sparse, and the infrastructure costs, emphatically
including network maintenance costs of trunks through sparsely occupied
rural areas, are too high. Latency quickly rears its ugly head too, limiting
realtime network activity to a relatively few hops. It can be done on the
metropolitan area scale, however. The amateur density on the ground is
enough to support the necessary infrastructure, and the distances involved
are short enough to keep latency problems at bay.
In Europe, where countries are hardly bigger than our states, national
networks may be feasible. In the US, however, we have too many large
areas where the amateur population density isn't sufficient to support
the necessary network infrastructure for a fast reliable national RF
network. We'd be wasting our time and resources trying to use the
wrong tool for that job. We need to concentrate on doing what we can
do well, that's metropolitan wireless networks.
Note, we can do low speed relaying on HF, and we can do some non-realtime
relaying on slow VHF links. That has some potential as a national, and on some
frequencies international, scoped message passing system. But it is really a
separate thing from actual packet networking. That sort of message relay is an
application that rides *on top* of an underlying network or networks.
Not only are different protocols required on the slow links, but the very
large
disparity in throughput and latency mean that the two don't interoperate well.
Trying to mix the two leads to a disappointing composite system no more
capable
than its weakest link. In an internet age, most amateurs aren't going to
tolerate
networks with latencies measured in hours or days. So there won't be much
continuing support for such efforts.
Gary
Gary Coffman KE4ZV | You make it |mail to ke4zv@bellsouth.net
534 Shannon Way | We break it |
Lawrenceville, GA | Guaranteed |
>.
------------------------------
Date: 18 Sep 1999 21:17:28 -0700
From: brian@karoshi.ucsd.edu (Brian Kantor)
Subject: Let's look at real numbers for TNC software sales
>for example, the "grapes" modem: All I find is articles about it, but
nothing
>regarding its sale; not even a used one for sale. So, the first problem is:
>If this stuff truly exists, where is it hiding?
www.paccomm.com
>.
------------------------------
Date: Sat, 18 Sep 1999 22:13:29 GMT
From: Chris Frost <cfrost@HiWAAY.net>
Subject: Packet radio with Newtons
I'm thinking of setting up a base station and login in remotely over an ht
with my newton (handheld computer). What options do I have to do this?
Only the "native" packet radio mode? Or might it be able to do tcp/ip
connections (the device does have a tcp/ip stack, though entended for
modems and infared).
Related question, assuming I can only use the native packet radio mode,
will it be possible to connect through another packet station which can
then forward my packets to the home station?
Also, any recommendations on a low power tnc for handheld use?
thanks!
--
- Chris, KE4FRC
-- Visit Me at http://www.frostnet.advicom.net --
>.
------------------------------
Date: Sat, 18 Sep 1999 14:15:26 GMT
From: djarrell@erols.com (Dave Jarrell)
Subject: PSK 31 and Soundblaster PCI
Recently replaced my older Soundblaster 16 with a new
Soundblaster 16 PCI. Now PSK-31 software fails to work. Program
executes but doesn't seem to make the connect to the sound card.
Does any know if PSK-31 uses a specific address and interrupt?
Has anyone else experienced this problem. I am using an AMD
K6-2/350 with 64MB RAM running under Windows 98.
73
Dave Jarrell
AH6OB/4
Springfield, VA
djarrell@erols.com
>.
------------------------------
Date: Sat, 18 Sep 1999 12:42:54 -0500
From: "George T. Baker" <w5yr@swbell.net>
Subject: PSK 31 and Soundblaster PCI
Suggest you look at the new Mixer program that came with the new card.
You may have inadvertently turned off some of the card inputs or outputs.
Also suggest you try Sound Recorder, etc. in Windows to ensure that the
card itself is working.
72/73, George AMA 98452 R/C since 1964
Amateur Radio W5YR, in the 54th year and it just keeps getting better!
AutoPOWER Systems, Fairview, TX (30 mi NE Dallas) Collin County
QRP-L QRP-ARCI FISTS NORCAL ZOMBIE ARS 10-X 33.2 N 96.6 W EM13RE
Dave Jarrell wrote:
>
> Recently replaced my older Soundblaster 16 with a new
> Soundblaster 16 PCI. Now PSK-31 software fails to work. Program
> executes but doesn't seem to make the connect to the sound card.
> Does any know if PSK-31 uses a specific address and interrupt?
> Has anyone else experienced this problem. I am using an AMD
> K6-2/350 with 64MB RAM running under Windows 98.
>
>
>
> 73
> Dave Jarrell
>.
------------------------------
Date: Sat, 18 Sep 1999 10:47:10 -0400
From: "Stephen Cornell" <scornell@fuse.net>
Subject: Wanted SCS PTC II
Good luck the only ones I have seen for sale were estate sales. They work
too well to sell.
Regards W8KZY
----------
In article <37c4a53d@news1.us.ibm.net>, "Johnny Rico" <lawdog2@ibm.net>
wrote:
> Boy not mine! Would not part with it!
>
> --
>
> Roger, W6VZV
> also reply via W6VZV@ARRL.NET
> --
> Politicians are the same all over. They promise to
> build bridges, even where there are no rivers.
> -Nikita Khrushchev
>
>
>
> <jhvogt@ibm.net> wrote in message news:37c356ff@news1.us.ibm.net...
>> Wanted: SCS PTC II used, we are going cruising and would like this
>> particular modem. Any for sale?
>>
>>
>
>
>.
------------------------------
End of Ham-Digital Digest V99 #235
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