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TN210.DOC
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***********
With this release one will find extensive revision over that in the earlier
TheNet Plus version 2.06 documentation. Based on comments received as well as
in-depth observation of network activity, added material on operating practices
and suggested approaches to laying out modern inexpensive backbone trunks has
been added. An effective LAN layout is also described. The section on node
operation and configuration has been expanded.
A program appended to this release is PATHCALC.EXE, a shareware program
written by Jon Adams, NW6H. PATHCALC will help NodeOps in evaluating the RF
path quality of existing links and is extremely useful in selecting new radio
links.
Another program appended is R95.EXE. R95 allows modification of BINARY
files to an ASCII format suitable for transmission over packet BBS networks.
Large files can be ZIPPED, split into smaller files, then recombined on the
receiving end. R95 doesn't create the problem of harsh sounds and monitor
lockups that binary transfers via TCP can cause. James Jones, WD5IVD is the
author of RADIX 95.
SOFTWARE NOTICE
TheNet Plus is designated as freeware and is released for amateur radio use
only. Permission is hereby granted to freely copy and distribute (on a non-
profit basis) all, or portions of the files associated with this release.
If partial distributions of this documentation package are made, please give
the appropriate author credit. Copies of TheNet Plus source code are not
available at this time. Those interested in source code for the original
TheNet version 1.0 series may direct requests to:
NORD><LINK
3300 Braunschweig
Hinter dem Berge 5
Germany
WARNING: Use of TheNet Plus in non-conformance of local network policy
may result in unsatisfactory system performance. ALWAYS coordinate the
operation of new nodes on existing networks prior to placing them in service.
ACKNOWLEDGEMENTS
Special appreciation goes to NORD><LINK's Hans Georg Giese DF2AU, and Mike
Roehner DC4OX, authors of TheNet. We also gratefully acknowledge the ideas
and comments submitted by many individuals. These include: Scott Cronk N7FSP,
Mark Frey VE3DTE, Eric Meth VE3EI, Don Nelsch K8EIW, Dick Sission W5ONL, Alan
MacPherson VE3KYZ, John Langtry VE3NEC, John Papay K8YSE, Dick Schiavo KF4WQ,
Bob Moorman K5VMX, Mykle Raymond N7JZT, Dick Taylor N5NGZ, Rich Ide N7LDI,
Brett Mueller KB5CDX, Juan Pineda EA3CIW, Roy Gould N5RG, Dick Wareing K3AKK,
Dave Weik KB7ZZ, Dick Jenkins N2AYY, Steve Weidner WB7WHF, Wally Foster N6CDJ,
Fred McKenzie K4DII, Hartley Gardner W1OQ and, Tad Torborg KA2DEW and Rich
Place WB2LJR, of the North East Digital Association. There has been a lot of
interest in this project and our apologies if we have overlooked anyone.
INTRODUCTION
The PURPOSE of packet nodes in a network is to act as relay points
extending the range of users. Compared to early digipeater networks (which
typically spanned a maximum distance of 8 - 10 hops), nodes allow users to
travel significantly farther. As of this writing Alan MacPherson, VE3KYZ holds
the distance record of thirty seven sequential hops through the system. Alan's
route was from Ontario, Canada to Arizona, USA.
Nodes are also useful in allowing frequency changes in a radio network.
They can be configured to route circuits between combinations of VHF/UHF/HF.
Nodes can accomplish changing from a radio route to a wire-line route. This
sometimes is done over satellite or telephone circuits.
A prerequisite for proper node software development is to reach a sensible
balance between network loading and providing useful features for the users.
It is tempting for software developers to design nodes with many "bells and
whistles". However, our RF networks are for the most part overloaded with
BBS, Packet cluster, and TCP/IP traffic. Until the networks are upgraded for
greater capacity, it's important that node design be oriented toward reducing
unnecessary node overhead.
We believe TheNet Plus achieves this goal. Each TheNet Plus feature was
carefully weighed in terms of usefulness versus the generation of added network
congestion.
TheNet Plus conforms to the International Standards Organization (ISO)
model for Open Systems Interconnection (OSI). OSI is a modular software
construction model for data communications. It is a functional guideline for
universal intercomputer communication. The OSI model was developed during the
1970s' and formally adopted as an international standard in 1983. This model
is known as CCITT X.200 or ISO 7498.
The TheNet Plus code is written into a 27C256 Electrically Programmed Read
Only Memory (EPROM) chip. This EPROM directly replaces U-23 that contains the
TNC program in TAPR TNC-2 or clones. Thus, a single chip change-out converts
the TNC into an economical and powerful node switch.
The new node features and networking suggestions in this release came about
through personal observations and user input. Our goal is to provide practical
nodeware along with information on the art of NodeOping. To this end, we would
appreciate feedback. Our points of contact are:
Software: Documentation:
********* **************
Packet: NJ7P@NJ7P.AZ.USA.NA N7OO@NJ7P.AZ.USA.NA
U.S. Mail: William A. Beech, NJ7P Jack Taylor
PO Box 38 RR-2 Box 1690
Sierra Vista, AZ 85636 Sierra Vista, AZ 85635
Spanish language coordinator and distribution:
**********************************************
Packet: NS7G@NJ7P.AZ.USA.NA
U.S. Mail: Rod Lopez
2302 6th st.
Douglas, AZ 85607