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<html>
<head>
<title>Reaching NASA From Home - Internet Access via Cable TV</title>
<img src=banner.gif>
<h1>Reaching NASA From Home - Internet Access via Cable TV</h1>
Last updated:
<em>
Thu Mar 14 09:56:55 EST 1996
</em><p>
Welcome to the
<em>Reaching NASA From Home - Internet Access via Cable TV</em>
Cooperative Agreement Notice web site.
Use this homepage to follow the progress of the CableNet project, an
endeavor to bring Internet access to the public via Cable Television.
<p>
I've rewritten these pages to be a bit more readable (user-friendly).
Much thanks to <a href=http://www.tezcat.com/~chicago/>Broadband Bob</a>
for his helpful comments, and for honoring this page, between February
20 and 27, on his <em>you gotta go here</em> feature.
I've also started work on a <a href=http://192.86.20.177/faq/>CableNet FAQ</a>, which is
very much still in-the-making.
Let me know what you think (email options in the body below).
Thank you and enjoy your stay.
</head>
<body><hr>
<!--
Technical terms and acronyms are introduced at the beginning of each
section, and are defined in a
<a href=/misc/glossary.html>glossary</a>.
They also appear as <em>emphasized</em> text on the pages
that introduce them.
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<dl>
<dt><strong><a href=http://192.86.20.177/proposal/>A Quick Overview</a></strong>
and
<strong>Technical Primer</strong>
<!-- <strong><a href=http://192.86.20.177/primers/>Technical Primer</a></strong> -->
<dd>An abridged guided-tour version of the original proposal to NASA.
Includes quoted material. Technical primers include:
<ul>
<li><strong>Internetworking Concepts</strong>
<!--
<li><a href=http://192.86.20.177/primers/internetworking.html>Internetworking Concepts</a>
-->
- ISO 7-layer model
<li><strong>Modulation Techniques</strong>
- AM, FM
<li><strong>Digital Encoding Techniques</strong>
- Manchester, Differential Manchester, etc.
</ul>
<dt><strong><a href=http://192.86.20.177/hardware/>CableNet Hardware</a></strong>
<dd>More than 1.25Mbps RF modems.
The <a href=http://192.86.20.177/hardware/>summary</a> follows bits as they encouter
each of these devices.
<ul>
<li><a href=http://192.86.20.177/hardware/ethernet.html>Ethernet</a>
- a popular LAN topology (3COM 3C509B-combo)
<li><a href=http://192.86.20.177/hardware/sync570.html>ARNET Sync570(i)</a>
- Synchronous serial I/O
<li><a href=http://192.86.20.177/hardware/voltage.html>voltage level converters</a>
- between RS232 and video levels
<li><a href=http://192.86.20.177/hardware/tvm550.html>Headend Tuning</a>
- forward channel <strong>mo</strong>dulation
<li><a href=http://192.86.20.177/hardware/philips.html>Tailend Tuning</a>
- forward channel <strong>dem</strong>odulation
<li><a href=http://192.86.20.177/hardware/t8.html>T-8 MOulating/DEModulating</a>
- return channel <strong>mo</strong>/<strong>dem</strong>'s
</ul>
<dt><strong><a href=http://192.86.20.177/software/>CableNet Software</a></strong>
<img src=construc.gif>
<dd>aka the CableNet suite of network protocols.
The <a href=http://192.86.20.177/software/>summary</a> explores each of these protocols
and their duties.
A list of related Internet
<a href=http://192.86.20.177/software/rfc.html>Requests For Comments (RFC's)</a>
provides links to formal protocol specifications.
<ul>
<li><a href=http://192.86.20.177/software/ip/>The Internet Protocol</a>
- for the IP LAN at home and the planet
<li><a href=http://192.86.20.177/software/iso8473/>ISO 8473</a>
- a standardized, commercially-supported network protocol
<li><a href=http://192.86.20.177/software/cablenet/>Cablenet Protocol</a>
- Link-layer media-arbitration, hardware addressing, control
message set, etc.
<li><a href=http://192.86.20.177/software/arp/>Address Resolution Protocol (ARP)</a>
- between IP and Ethernet, as well as between ISO and [any]
CableNet [hardware addressing]
<li><a href=http://192.86.20.177/software/ip_masquerading/>IP Masquerading</a>
- done at the tailend box
<li><a href=http://192.86.20.177/software/ccmp/>CableNet Control-Message Protocol</a>
- line quality, etc.
</ul>
<dt><strong>In the Field</strong>
<dd>This works in the real world; most recent achievements listed first.
<ul>
<li><strong>Electrical readings</strong> describing good/bad conditions
<li>Rudimentary <strong>CableNet Control Message</strong> set
<!--
<li><a href=http://206.67.155.2/>WWW server at the Cable Headend</a>
-->
<li><a href=http://192.86.20.177/demos/>Public demos and press coverage</a>
<li>1.25Mbps, full-duplex [forward <em>and</em> return channels]
</ul>
<!-- Here down shall not change, except maybe for the mailform -->
<dt><strong>NASA, Our Group, and Other NASA R&D Efforts</strong>
<dd><ul>
<li><a href=http://www.nasa.gov/>NASA's Homepage</a>.
<li>[Other] <a href=http://192.86.20.177/whoswho/>People and Companies</a>
involved in this effort.
<li><a href=http://dlt.gsfc.nasa.gov/Cans/>Other CAN's</a>
and a transcript of the official
<a href=http://camille.gsfc.nasa.gov/rsd/PR/PR1.html>
NASA Press Release</a>
on Internet Grants and Cooperative Agreements.
</ul>
<dt><strong>An Invitation for Your Comments</strong>
<dd><ul>
<li>Email the author (me, Payter Versteegen) with your comments to:
<a href=mailto:payter@niccolo.gsfc.nasa.gov>
payter@niccolo.gsfc.nasa.gov</a>
<li>Or use my <a href=http://192.86.20.177/cgi-bin/mailform/>CGI mailform</a> if your
browser doesn't like <strong>mailto:</strong>
</ul>
</dl>
You are this month's visitor number:
<img src=5.htm><img src=4.htm><img src=3.htm>
<img src=2.htm><img src=1.htm><img src=0.htm>
<hr>
<address>
<a href=mailto:payter@niccolo.gsfc.nasa.gov>
payter@niccolo.gsfc.nasa.gov
</a>
</address>
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