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PA2AGA > HDDIG 13.09.00 20:15l 192 Lines 7442 Bytes #999 (0) @ EU
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From: PA2AGA@PI8HGL.#ZH1.NLD.EU
To : HDDIG@EU
Date: Tue, 12 Sep 00 23:00:13 MET
Message-Id: <hd_2000_249E>
From: pa2aga@pe1mvx.ampr.org
To: hd_broadcast@pa2aga.ampr.org
X-BBS-Msg-Type: B
memory, 2 floppy drives, and a SCSI port (which AFAIK no one
ever used). It has 4 HDLC ports, and a daughter board carrying
4 modems (alas, only 1200 baud).
Besides the units sent to software developers, 6 were sent
out for field tests. This is one of them. There were components
for another dozen which were never shipped. A friend of mine
has those. He got them when TAPR was selling off surplus
and obsolete inventory. (I don't know why, I suspect he just
wanted to corner the market on a bit of nostalgia.)
The NNC was a technical success, but it was the victim of
mass market economics. The one I have is still functional.
But the rapidly falling prices of PC clones made the NNC
an uneconomic choice for use as a network packet switch.
After careful consideration, GRAPES decided to deploy PC
clone based switches instead of using the NNC. PC clones
were about as cheap, and much easier to maintain in the field
because replacement parts were as near as the corner clone
store.
The NNC would have done the job for us then (though not after
we moved to 56 kb). But because the NNC was single sourced
in low volume, it wouldn't have been economic to maintain a large
scale high reliability network built around them.
TAPR couldn't have known when they started development of
the NNC that PC clone prices would plummet so quickly, and
so sharply. But they did, and that put an end to the NNC as a
viable network switch.
Gary
Gary Coffman KE4ZV | You make it |mail to ke4zv@bellsouth.net
534 Shannon Way | We break it |
Lawrenceville, GA | Guaranteed |
------------------------------
Date: Mon, 11 Sep 2000 21:22:13 GMT
From: "Hank Oredson" <horedson@att.net>
Subject: MURS potential
"Gary Coffman" <ke4zv@bellsouth.net> wrote in message
news:vj3qrs440ts10v2ib38kste29tq34sp8nb@4ax.com...
> On Fri, 08 Sep 2000 03:19:30 GMT, "Hank Oredson" <horedson@att.net> wrote:
> >"Ed Hare, W1RFI" <w1rfi@arrl.net> wrote in message
> >news:olXt5.580$u95.1495895@news.ntplx.net...
> >> <horseshoestew@my-deja.com> wrote:
> >>
> >> > I heard somewhere(I think it was on TAPR's Spread Spectrum mail list)
> >> > that 900Mhz devices "do better" than 2.4Ghz devices, as far as
> >> > propagation is concerned. I think someone mentioned an "evil"
> >> > multipath problem. Are they just covering their asses for choosing
> >> > 900Mhz for the FHSS radio project, or is this a legitimate concern?
> >>
> >> Do you really think that the fine folks at TAPR would put all the work
they
> >> do into promoting digital radio, then promote 900 MHz if it was second
best
> >> because one TAPR project uses 900 MHz? The leadership at TAPR cares very
> >> much about what they are doing and I have confidence that if they are
> >> recommending 900 MHz, it is not to cover their butts over the 900 MHz FH
> >> project.
> >>
> >> 73,
> >> Ed Hare, W1RFI
> >
> >Remember the NNC?
> >
> >TNC-1, then TNC-2, then NNC, which was planned to give the
> >hardware base upon which we could build networks. That was ...
> >... without digging out my NNC architecture diagrams and looking
> >at actual dates but relying on memory ... about 1985. As far as
> >I know, none were actually built, although a few boxes of similar
> >design were created by more than one group. Nothing comparable
> >to the TNC-2 done since then.
>
> I remember the NNC. In fact I can look to my right and see one
> on a shelf right this minute. It is 64180 based, with 256 kb of static
> memory, 2 floppy drives, and a SCSI port (which AFAIK no one
> ever used). It has 4 HDLC ports, and a daughter board carrying
> 4 modems (alas, only 1200 baud).
Were 9k6 modems ever developed for the NNC?
<chomp>
I have some pix, schematics, and source code for the alpha version of
that design. They are lurking in a file storage box somewhere around here.
There were a couple other architectures under consideration.
One had no floppy or hard drive support. I argued that floppy support
would be a "good thing" because it would make it easier to load firmware
compared to the serial port/parallel port schemes that were also considered.
The hardware design I liked best would have used a small rack type
box with a backplane and 4 - 12 slots for SBC card, modem cards,
floppy, and possible future extensions (e.g. ip router card). That design
didn't fly, looked too expensive.
As you pointed out, the availability of cheap PCs removed the need for
NNC hardware. However the software part of the project died along
with the hardware part. Had the software part of the project continued,
we might have had something different than NET/ROM as the common
L3/L4 protocol, and might have had native ip routing from the start.
There were a bunch of other netowrking projects that started about this
same time. TEXNET, ROSE, the Southern California effort (forgot names/calls).
--
... Hank
http://horedson.home.att.net
------------------------------
Date: Mon, 11 Sep 2000 14:50:46 -0500
From: "Rick Ruhl - CSS" <ricker@cssincorp.com>
Subject: PR:GoList/Log Windows bundle released
CSS and GoList work together for the Dxer's benefit.
Muscle Shoals, Alabama. September 11, 2000: Creative Services Software
announced that they have reached an agreement with The GoList to provide a
bundled package of the Log Windows logging software and The GoList . The
package will include the latest version of Log Windows and a one year
subscription to The GoList
The Log Windows/GoList bundle retails for $119.95. It will also be part of
the Digital Trio package from CSS, which retails for $189.95. Cross
upgrades from release 3.06.50 or greater to the GoList subscription are $60.
A cross upgrade for current GoList subscribers to Log Windows is $60.
Log Windows is owned by SCO, Inc and is maintained by Creative Services
Software.
Creative Services Software is at http://www.cssincorp.com
The GoList is at http://www.golist.net
The Log Windows homepage is at http://www.logwindows.com
SCO, Inc is on the web at http://sco.home.mindspring.com/lw.html
Windows, Windows 95, Windows 98, Windows Me, Windows 2000 and Windows NT are
Registered Trademarks of Microsoft Corporation.
--
Rick Ruhl
President, Creative Services Software
http://www.cssincorp.com
------------------------------
Date: Mon, 11 Sep 2000 07:13:55 -0700
From: "Dana H. Myers K6JQ" <Dana@Source.Net>
Subject: TH-D7A secrets
horseshoestew@my-deja.com wrote:
> How did Kenwood manage to get a 9k6 modem to fit into such a small
> space on their TH-D7A radio(not to mention a dual-band radio with two
> serial ports). Has anybody opened up one of these puppies yet?
As others have pointed out, they've integrated a small OEM TNC from
Tasco Japan.
>
> The old 1200bps Amateur TNCs have a special modem chip(but most of them
> are still huge because nobody bothered to upgrade the technology in the
> last 5 years - save PacComm with the picoPacket). The old 1200bps
> modem chip has been available for years(since the 80's). I believe it
> was put out my AMD, and was called the "World Modem Chip" because it
> did both Bell 202(old European 1200bps telephone standard, and ham
> packet standard) and Bell 212(old American 1200bps telephone standard).
To be continued in digest: hd_2000_249F
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