Re: Ethernet connection sensitive to cable length

Re: Ethernet connection sensitive to cable length

NewsGroups | Search | Tools
 comp.dcom.lans.ethernet  Post an article  get this group's latest topics as an RSS feed add this group's latest topics to your My MSN content add this group's latest topics to your My Yahoo content  add this group's latest topics to your Google content  YahooMyWeb Yahoo!  Google Google  Windows Live Favorites Windows Live  del.icio.us del.icio.us  digg digg  Add to Netscape Netscape
Subject Author Date
Re: Ethernet connection sensitive to cable length ps56k 05-03-2008
Posted by msg on May 4, 2008, 2:17 am
If you were  Registered and logged in, you could reply and use other advanced thread options
Jeff Liebermann wrote:

<snip>
> 4. In the miscellaneous category,... ethernet over 25 pair
> telco bundles

Starlan 1 Mbps?

Michael

Posted by ps56k on May 4, 2008, 2:24 am
If you were  Registered and logged in, you could reply and use other advanced thread options
msg wrote:
> Jeff Liebermann wrote:
>
> <snip>
>> 4. In the miscellaneous category,... ethernet over 25 pair
>> telco bundles
>
> Starlan 1 Mbps?
>
> Michael

wow - StarLan -
That really takes me back...
We creating the video training and marketing materials...



Posted by Jeff Liebermann on May 4, 2008, 4:02 am
If you were  Registered and logged in, you could reply and use other advanced thread options

>Jeff Liebermann wrote:
>
><snip>
>> 4. In the miscellaneous category,... ethernet over 25 pair
>> telco bundles

>Starlan 1 Mbps?
>Michael

Nope. 10Mbits/sec half-duplex ethernet over 25 pair telco bundles.
Works fine up to about 100ft. It might work farther, but I haven't
tried it.

Gaaak. Starlan brings back not very fond memories of doing battle
with 3B2-400 clunkers using Ma Bell 258A wiring on CAT3 shared with
Pre-Merlin phone systems. I had no idea what I was doing, so it's
little wonder that I could never make it all work quite right.

Sorry, no LatticeNet. Some Token Ring (4Mbit/sec), Moses Networks
Promise LAN, DECNet, Novell Netware, 3com something pure ISO stack,
Microsoft LAN Manager, Lantastic, and probably a few more that I'm
successfully forgotten about. Add a bunch of TCP/IP implimentations
for Windoze 3.x that never quite worked right, and a mess of
non-802.11 schemes and protocols, that went nowhere.

--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

Posted by ps56k on May 4, 2008, 12:42 pm
If you were  Registered and logged in, you could reply and use other advanced thread options
Jeff Liebermann wrote:
> Gaaak. Starlan brings back not very fond memories of doing battle
> with 3B2-400 clunkers using Ma Bell 258A wiring on CAT3 shared with
> Pre-Merlin phone systems. I had no idea what I was doing, so it's
> little wonder that I could never make it all work quite right.

3B2 - ahhhhhh -
We also did the training video & product intro for the "Unix PC" -
along with the IBM 3270 replacement..... can't recall the number, maybe 6500
?
Lastly - we did the AT&T PC product materials & launch -

ahhhhhh -



Posted by Rich Seifert on May 4, 2008, 12:55 pm
If you were  Registered and logged in, you could reply and use other advanced thread options

> Moses Networks Promise LAN

I knew some of the developers there, and just *loved* the product name.
In the end, it was more of a promise than a LAN, however.

My all-time favorite communications product name was from a company
(whose name I forget) up in Marin county who built a very simple device.
"Back in the day", terminals connected to computers using modems, which
had a "DCE flavor" (modem-to-host computer) and a "DTE flavor"
(modem-to-terminal) for the wiring. If you wanted to connect a terminal
directly to a computer, you could eliminate the modem, but needed to
cross-connect the transmit/receive pairs in the cable. Today we all know
this as a "null modem" cable, and it is fairly ubiquitous, but it hasn't
always been so.

This small company marketed a "null modem" device; a small box that had
the transmit/receive cross-wiring, with connectors that would allow the
use of ordinary, uncrossed-wiring modem cables to the DTE and DCE.
Simple, but useful if you don't have a null modem cable.

No technological genius here, but great marketing savvy. Instead of
calling it a "cable crossover" or some such, they called the device a
"QuasiModem"--the box had a picture of a bent-over Quasimodo carrying
the device under his arm, with the slogan "We've got a *hunch* you'll
like it!"

Believe it or not, between the last two sentences I just went outside my
office and shot a bobcat who was chasing my house cat, whose name
happens to be "Cat 3"(he is my third cat). No, I am not planning to
upgrade him to Cat 5.

--
Rich Seifert Networks and Communications Consulting
21885 Bear Creek Way
(408) 395-5700 Los Gatos, CA 95033
(408) 228-0803 FAX

Send replies to: usenet at richseifert dot com

Similar ThreadsPosted
cat5 cable length problem February 22, 2007, 9:04 am
Maximum Cat5e or Cat6 Cable Length February 16, 2007, 3:48 pm
WakeONLAN did not work for direct cable connection ? (Nics were shutdown after a night of sleep ?) February 9, 2008, 4:56 am
detecting end/length of Ethernet II frame? April 28, 2005, 11:03 am
10/100 Ethernet Differential Pairs PCB Trace Length April 15, 2008, 2:56 pm
Ethernet Braoadband connection to home, assigning static private IP addr? May 21, 2005, 9:14 am
Is the ethernet connection to home from ISP is secure for Bank and on-line transaction using Credit cards? May 20, 2005, 6:11 am
LF: Crossover Ethernet Cable 25 feet August 25, 2006, 3:27 pm
CAT-5 cable stuck in ethernet port - can't remove April 26, 2006, 5:55 am
Long Range Ethernet transmission over twisted-pair cable April 12, 2006, 6:14 am

other useful resources:
The Federal Communications Commission (FCC)
Telecommunications Industry Association
Electronic and Software Security Products and Services
International Telecommunication Union

Custom CGI Perl and PHP programming by 1-Script.com

Contact Us | Privacy Policy
The site map in XML format XML site map