| |
PA2AGA > HDDIG 19.03.00 12:15l 227 Lines 6538 Bytes #-9542 (0) @ EU
BID : HD_2000_76D
Read: GUEST
Subj: HamDigitalDigest 2000/76D
Path: DB0AAB<DB0SL<DB0RGB<DB0MRW<DB0ERF<DB0BRI<DB0SM<PI8DAZ<PI8GCB<PI8HGL<
PE1MVX<PE1NMB<EA7URC<PE0MAR<PI8VNW
Sent: 000319/0808Z @:PI8VNW.#ZH2.NLD.EU #:58041 [HvHolland] FBB7.00g24
From: PA2AGA@PI8VNW.#ZH2.NLD.EU
To : HDDIG@EU
Received: from pa2aga by pi1hvh with SMTP
id AA31613 ; Sun, 19 Mar 00 05:45:38 UTC
Received: from pa2aga by pa2aga (NET/Mac 2.3.70/7.5.3) with SMTP
id AA00018420 ; Thu, 16 Mar 2000 18:12:37 MET
Date: Thu, 16 Mar 00 18:07:58 MET
Message-Id: <hd_2000_76D>
From: pa2aga
To: hd_broadcast@pa2aga
Subject: HamDigitalDigest 2000/76D
X-BBS-Msg-Type: B
> As conditions that lead to FRMR usually are caused by defective software
> at the other end, it seems to be better to just be silent than to send
> FRMR and tickle an area in that defective software that is probably even
> less well tested than the main protocol.
I rather suspected this was the logic.
> I have not made any mods in NOS, but I remember well the days that the
> AX.25 protocol handler in NET was changed by Phil to exactly conform to the
> letter of the spec instead of to "Be conservative in what you send and
> liberal in what you accept", and the resulting problems. I certainly
> understand why some of that behaviour would have been changed, I did the
> same in NET.
I'm still mildly tempted to build a pedantic flavor of AX.25 for giggles,
maybe I can save the trouble by looking at ancient tcp-group archives?
> (another condition that often would lead to a FRMR in the official protocol
> and will cause no harm when simply ignored: excessive buffering of packets,
> e.g. in a KISS TNC, outside of the control of the AX.25 engine. this can
> cause "long delayed packets" that arrive after a corrective action was
> already taken)
The relatively short sequence-number stream is certainly an issue here. X.25
was clearly designed for relatively reliable wired circuits, and certainly
leaves
a bit to be desired in the translation to radio circuits, even relatively good
ones. Old news, I know, but I've been recently reminded :-)
Dana
--
Dana K6JQ DoD #j
Dana@Source.Net
>.
------------------------------
Date: Wed, 15 Mar 2000 20:22:08 GMT
From: horseshoestew@my-deja.com
Subject: Packet on FRS?
In article <8aoqg9$5o1$1@nnrp1.deja.com>,
horseshoestew@my-deja.com wrote:
> In article <1zRz4.4195$511.1252346@tw11.nn.bcandid.com>,
> "Rick Ruhl" <ricker@cssincorp.com> wrote:
> > I remember in the FCC rules that only voice was permitted on the FRS
> > frequencies. We looked into it a while back to find out of we could
do
> a
> > low cost FRS paging service.
>
> What about packet on GMRS? Is it permitted?
>
Forget it - I found the answer....
95.627 Emission types.
(a) A GMRS transmitter must transmit only emission types A1D, F1D, G1D,
H1D, J1D, R1D, A3E, F3E, G3E, H3E, J3E or R3E. A non-voice emission is
limited to selective calling or tone-operated squelch tones to establish
or continue voice communications. See 95.181(g) and (h).
(b) [Pertains only to the Radio Control Radio Service.]
(c) [Pertains only to the Citizens Band Radio Service.]
(d) No GMRS or CB transmitter shall employ a digital modulation or
emission.
(e) No GMRS. CB or R/C transmitter shall transmit non-voice data.
Bummer... What we COULD do with digital... Damn Qualcomm.
Sent via Deja.com http://www.deja.com/
Before you buy.
>.
------------------------------
Date: Wed, 15 Mar 2000 19:14:56 GMT
From: horseshoestew@my-deja.com
Subject: Packet on FRS?
Has anyone done 1200bps or 9600bps packet on FRS or GMRS? The radios
have MIC and SPEAKER connections.
This would be a cool use for all those 1200bps TNCs gathering dust in
the corner. Heck, you don't even need a TNC - most computers come with
a sound card that should be able to do 1200bps packet. Kids would DIG
being able to use their home computers to send e-mail over their FRS
radios to other kids in their neighborhood. A few folks could set up
some GMRS digipeaters or nodes and link a whole community! A GMRS base
station could be a gateway to the Internet for those that have 24hr
Internet access in their homes. Many possibilities exist here. And it
wouldn't cost hardly anything!
It will really freak the kids out to hear those packet tones on their
FRS radios. Totally cool.
Stewart Teaze - N0MHS
Sent via Deja.com http://www.deja.com/
Before you buy.
>.
------------------------------
Date: Tue, 14 Mar 2000 17:42:00 -0600
From: jack <cmb@owc.net>
Subject: wanted baycomm bp-2m
looking for a baycom bp-2m multimode modem
thanks jack n9iif
>.
------------------------------
Date: 15 Mar 2000 06:11:31 GMT
From: redberd95@aol.comnospam (REDBERD95)
Subject: WTB - Interface
No AUX port on the Argosy II.
Thanks
Randy
>.
------------------------------
Date: 15 Mar 2000 05:43:48 GMT
From: nielsen@primenet.com (Bob Nielsen)
Subject: WTB: MFJ 1270 TNC docs/firmware
On Tue, 14 Mar 2000 21:25:58 -0700, John Burch wrote:
>Wanted: Documentation on MFJ 1270 (no suffix)
>TNC. Already checked the MFJ web site, but only
>found the 1270C.
>
>Also wanted - the "stock" or original firmware that
>came with the TNC. Or maybe your broken MFJ
>model 1270 TNC?
>
>Any help would be appreciated.
The closest thing I can think of is the TAPR TNC-2 documentation at
ftp://ftp.tapr.org/software_lib/tnc/tncdocs.zip.
The ORIGINAL version of this was copied for the MFJ documentation,
however the only available version was updated around 1992. The prime
differences are the removal of the MF-10 filter, upgrading the SRAM
from 16K to 32K and adding the additional commands in version 1.1.8a
firmware (this is a lot closer to the 1270 than the 1270C would be).
I'm not sure if the MF-10 was in the original 1270 or not (it had been
removed in the 1270B). I suspect that the 1270 had the equivalent of
1.1.3 firmware. The TNC-2 schematics are also available in the same
directory.
Bob
--
Bob Nielsen, N7XY (RN2) nielsen@primenet.com
Tucson, AZ DM42nh QRP-L #1985 SOC #77 http://www.primenet.com/~nielsen
>.
------------------------------
Date: Tue, 14 Mar 2000 21:25:58 -0700
From: "John Burch" <occupant@enetis.net>
Subject: WTB: MFJ 1270 TNC docs/firmware
Wanted: Documentation on MFJ 1270 (no suffix)
TNC. Already checked the MFJ web site, but only
found the 1270C.
Also wanted - the "stock" or original firmware that
came with the TNC. Or maybe your broken MFJ
model 1270 TNC?
Any help would be appreciated.
John
...
>.
------------------------------
End of Ham-Digital Digest V2000 #76
******************************
You can send in your contribution to this digest by
sending an e-mail to: hd-group@pa2aga.ampr.org
or (via BBS-net) to: hdaga@pi8vnw.#zh2.nld.eu
Read previous mail | Read next mail
| |
