HDTenEightyP/NetNews huggingface dataset:
From: bwolfe@rad.rpslmc.edu (Brian A. Wolfe)
Subject: Fiber: Single or Multimode?
Reply-To: bwolfe@rad.rpslmc.edu
Organization: Rush Presbyterian-St. Lukes Medical Center, Chicago IL 60612
Date: Wed, 16 Dec 1992 23:28:21 GMT


Hi there,

I'm involved in a project that requires putting in a fiber backbone
for a very large campus, we've talked about putting in 144 strands of
62.5 micron multimode fiber between buildings, but I'm wondering if 
its worth including single-mode fiber as well.

Can anyone give me examples of applications that would require
single-mode fiber which could not be accomplished with multi-mode
fiber (videoconferencing??)? Also, should I be concerned about 
requesting specific grades of multi-mode fiber? (I have heard of 
"fddi grade", are there others?)

Thanks in advance,

Brian



-------------------------------------------------------------------------
Brian Wolfe						
Associate Director
Dept of Diagnostic Radiology and Nuclear Medicine
Rush Presbyterian-St. Lukes Medical Center 
Chicago,  IL   USA 
Internet: bwolfe@rad.rpslmc.edu    
Voice:    (312)-942-2141          FAX:  (312)-942-2114

Newsgroups: comp.dcom.lans.misc
From: fenton@iron.hq.aflc.af.mil (George I. Fenton)
Subject: LOCALTALK & ARCNET INFORMATION REQUESTED
Summary: Requesting Arcnet and Localtalk information
Keywords: ARCNET LOCALTALK
Organization: U.S. Air Force Security Assistance Center (AFSAC)
Distribution: comp
Date: Sun, 13 Dec 1992 14:52:42 GMT

Hello LAN gurus!  I have a couple of questions on Localtalk & Arcnet for my
research here in Dayton, Ohio:

1.  WHAT IS THE FRAME FORMAT AND FIELD FUNCTIONS OF AN ARCNET FRAME?

2.  WHAT IS THE PRINCIPAL ORGANIZATION THAT SUPPORTS LOCALTALK?  IS THE
    SAME AS APPLETALK?

3.  WHAT ARE THE CHARACTERISTICS OF AND MAJOR SERVICES PROVIDED BY LOCALTALK?

4.  WHAT ARE THE FRAME FORMAT AND FIELD FUNCTIONS OF A LOCALTALK FRAME?


If you have any recommendations on references/books on the above subjects,
please let me know.  Thanks and have a great Christmas!!

--GIF
Newsgroups: comp.dcom.lans.misc
Subject: Book review wanted
From: sichermn@csulb.edu (Jeff Sicherman)
Date: Sun, 13 Dec 1992 21:18:00 GMT
Organization: Cal State Long Beach

  Does anyone have any comments on a book called _LAN Performance Optimization_
by Martin A. W. Nemzow. From the picture in the flyer (The Computer Book Club)
looks to be a Windcrest (McGraw-Hill) publications [not surprising, they are
behind the book club).

  On the short side (230 pages) for a book on that subject, I would think.
Diskette with the authors utility program (which the book centers on, I
presume) is included. My past exposure to this kind of thing is that they are
spare vehicles for programs that are not necessarily commerically marketable
and the books are more manual than technical/theoretical, but I want to keep
at least a partially open mind.

  Any other good books on Lan performance considerations, design, debugging ?




-- 
Jeff Sicherman
up the net without a .sig
Newsgroups: comp.dcom.lans.misc
From: dave@ubitrex.mb.ca (Dave Paradis)
Subject: Ethernet to Token-Ring Bridges
Organization: Ubitrex Corporation, Winnipeg, Manitoba, Canada
Date: Wed, 16 Dec 1992 19:28:46 GMT


Hello all,

Can anyone tell me which companies make
Ethernet/802.3 to Token-ring bridges?

Thanks

Dave
-- 
----------------------------------------------------
David T. Paradis        E-mail: dave@ubitrex.mb.ca  
Ubitrex Corporation     Phone:  204 942-2992 Ext 230
Winnipeg, MB, Canada    FAX:    204 942-3001
From: craig@cattnts.canada.ncr.com (Craig Campbell)
Newsgroups: comp.dcom.lans.misc
Subject: Re: DOS, OS/2, MAC mixed networks
Keywords: heterogenous networks
Date: 16 Dec 92 14:02:07 GMT
Organization: AT&T / NCR Canada Ltd., Toronto, Canada

In article <17767@pitt.UUCP> jack@nelslab.wpic.pitt.edu writes:
>I am trying to get a 10BASE-T network set up for a small non-profit which
>can allow DOS and OS/2 and MAC pc's to share printers & files on a server
>(preferably UNIX based), and to have a SLIP or PPP link to a university site
>so that students and faculty can have access to the university network and
>the internet.  I suppose the SLIP could be across a fast modem link, but
>maybe ISDN will be able to handle it eventually(?).  The number of pc's
>is small (5-10) so it must be a reasonably low-cost solution.

>Has anyone done such a network? Can you recommend any source (vendors,
>consultants, etc.) who would do it without blinking? Does anyone have real
>experience with DEC's Pathworks or other Lan Manager versions (NCR), in
>particular the MAC services?

NOTICE:  I WORK FOR NCR....Potential Bias....

The NCR version of Lan Manager inherited from AT&T, MAC services and serving,
including file and print services.  Prior to the AT&T / NCR merger, I worked 
with this product at AT&T and saw it perform.  Hence, I would conclude that
NCR has what you want, and it does work.

For any more details, please contact NCR privately.  (I hope I didn't slide
too deep into a sales pitch... :-))

>Jack

craig
-- 
Craig Campbell		|	These opinions are entirely the result of a 
Systems Engineer	|	small butterfly crashing into the far side
NCR Canada,		|	of the planet.  Chaos Rules.
an AT&T Company		|	I speak for no one, except, possibly, myself.
Organisation: European Space Operation Centre (E.S.O.C)
Date: Wednesday, 16 Dec 1992 14:23:34 CET
From: <DNASTASZ@ESOC.BITNET>
Newsgroups: comp.dcom.lans.misc
Subject: EIA/TIA 568

Good Afternoon,
I need to get my hands on a copy of EIA/TIA 568. Can anyone give me a
phone/fax/email number for the Electrical Industries Association /
Telecommunications Industries Association so that I can order a copy?

Answers by email please!

Dave Nastaszczuk. ESOC, 6100 Darmstadt, Germany.    dnastasz@esoc.bitnet
Newsgroups: comp.dcom.lans.misc
From: matt@wardsgi.med.yale.edu (Matt Healy)
Subject: Re: Does transmitting station stop looking for collision after collision window?
Followup-To: comp.dcom.lans.misc
Organization: Yale U. - Genetics
Date: Wed, 16 Dec 1992 16:28:13 GMT

In article <Bz0vA3.D9G@news.iastate.edu>, john@iastate.edu (John Hascall)
wrote:
> 
> [*please* stick to < 80 columns...]
> 
> jim@mivax.mc.duke.edu (James D Dryfoos - Systems) writes:
> }I am trying to find out if there is a point during transmission
> }of an ethernet packet that the
> }transmitting card stops listening to the wire to see if...
> 
> Yes, the ethernet chip(set) will notice the collision.  A collision
> after 512 bits is a `late collision'.  A late collision indicates your

A late collision should not occur because any Ethernet card
is supposed to *listen* before it starts talking.  In their
advertisements during the early days of Ethernet, XeroX used
to compare this to *polite* people at a cocktail party: you
don't interrupt somebody else; you wait for a pause.  Thus a
collision should only take place when two cards attempt to
begin transmitting at about the same time.  The so-called
"collision window" is the time period during which a collision
can occur on a properly-functioning network because collision
detection cannot be instantaneous.  This is the main reason
for having a minimum packet size, a maximum segment length, and
the 4-repeater restriction: to ensure a sufficient collision
window for detection to work.

A late collision means that some device is transmitting when
it should *not* be doing so.  Properly-functioning devices can
detect and report a late collision as an error, but they cannot
solve the problem because the device which is the cause has
already demonstrated its inability to follow the rules.

(of course, in the cocktail party analogy at this point the
boor who interrupted would get shouted down...)

Matt Healy
"I pretend to be a network administrator;
 the lab net pretends to work"

matt@wardsgi.med.yale.edu
From: pablo@FibHaifa.com (Pablo Brenner)
Newsgroups: comp.dcom.lans.misc
Subject: Cards information
Date: 15 Dec 92 08:21:55 GMT
Reply-To: pablo@picasso.FibHaifa.com
Organization: Fibronics ltd., Haifa - ISRAEL
Originator: pablo@picasso


Hi,
   a friend of mine bought a PC, and found a couple of cards inside,
of course he didn't get a manual nor s/w, so he asked me what they are,
I could only identify that one is an Ethernet card and the other looks
like a modem (+fax ?).
Here are some details, maybe somebody can give more info:

- The "Ethernet" card seems to be from FOX Research Inc. (GG00513L appears)

- The "Modem" card seems to be from Hedaka (ZX1800A V2.2)

Thanks.

--Pablo 
--------------------------------------------------------------
Pablo Brenner -  R&D Dept.
Fibronics Ltd., Matam Industrial Park, Haifa 31905, ISRAEL
e-mail: pablo@FibHaifa.com          Wireless: CX5YI/4X
phone: +972-4-313675                Fax: +972-4-536360
=============== Usual disclaimers apply =======================
-- 
--------------------------------------------------------------
Pablo Brenner -  R&D Dept.
Fibronics Ltd., Matam Industrial Park, Haifa 31905, ISRAEL
e-mail: pablo@FibHaifa.com          Wireless: CX5YI/4X
From: george@ache.mad.adelaide.edu.au (George Travan)
Newsgroups: comp.dcom.lans.misc
Subject: TDR
Date: 16 Dec 1992 04:33:15 GMT
Organization: University of Adelaide
Distribution: world
Reply-To: george@frodo.ua.oz.au
NNTP-Posting-Host: ache.mad.adelaide.edu.au
Keywords: TDR
Originator: george@ache.mad.adelaide.edu.au



I have just put a PC on a thin wire ethernet network. It has a NI5210
card with packet drivers.
When the pc boots I get the following:

TDR:0 Clocks away is a short (not completely reliable)

When the boot finishes, I can telnet Ok and their seem be little or no
errors (reflections/retransmissions) on the server.

Anyone know what this may be due to??

/Geo

-- 
                  George Travan "A Rebel Without A Clue!"                   
                  E-mail: george@ache.mad.adelaide.edu.au                       
     Phone: (Australia) +61 08 228 5968   Fax: (Australia) +61 08 224 0464  
        University of Adelaide,G.P.O Box 498 Adelaide, AUSTRALIA 5001       
Newsgroups: comp.dcom.lans.misc
From: orion@leo.unm.edu (Tim Guerrette)
Subject: Book List?	
Date: Tue, 15 Dec 92 19:43:24 GMT
Organization: University of New Mexico, Albuquerque

Does anyone have a list of the best LAN and communications books around? I am looking book list and I can't find one.

Please e-mail me.

Thanks,

===============================================================================
Timothy Guerrette	    		Internet: orion@polaris.unm.edu
University of New Mexico
Albuquerque, NM
    "Yesterday is history, tomorrow is vision, today is just a bitch!"
===============================================================================
From: richard_kogut@brown.edu (Richard M. Kogut)
Newsgroups: comp.dcom.lans.misc
Subject: Re: Fiber: Single or Multimode?
Date: 18 Dec 1992 15:02:06 GMT
Organization: Brown University Computing & Information Services
NNTP-Posting-Host: rich_kogut.cis.brown.edu

In article <1992Dec16.232821.13003@rpslmc.edu> bwolfe@rad.rpslmc.edu (Brian A. Wolfe) writes:
>From: bwolfe@rad.rpslmc.edu (Brian A. Wolfe)
>Subject: Fiber: Single or Multimode?
>Date: Wed, 16 Dec 1992 23:28:21 GMT
>
>Hi there,
>
>I'm involved in a project that requires putting in a fiber backbone
>for a very large campus, we've talked about putting in 144 strands of
>62.5 micron multimode fiber between buildings, but I'm wondering if 
>its worth including single-mode fiber as well.
>
My guess is that multi-mode will be obsolete in a couple of years. Its 
capacity peaks out around 200 Mbps. Single-mode goes well into the gigabyte 
range. Single-mode is also cheaper by the foot. Up to now it has been more 
expensive to connectorize and to drive, but that will change as the market 
gets bigger -- it's merely a problem of volume. We are putting in a 50-50 
mix of multi-mode and single-mode everywhere we install now. 
Richard M. Kogut,   Manager, Systems Services
                    Brown University Computing & Information Services
Newsgroups: comp.dcom.lans.misc,comp.dcom.lans.ethernet
From: cs@cbnewsh.cb.att.com (cetin.seren)
Subject: need info on sniffers.
Organization: AT&T
Distribution: na
Date: Tue, 15 Dec 1992 06:31:39 GMT
Followup-To: poster
Keywords: starlan, twisted pair, AUI, collision source detection




Hello netters,

Once again we're here seeking advice on a matter we have been
figthing with for months.

We have a network with around 150  machines on it.
It is built with starlan 10 HW (i.e., starlan 10 hubs and 
RJ-45 type 4 pair wire)  Our HUBS are configured in a 
star formation to reduce network "rise time" problems.

Unfortunately, sometimes  people attach machines from their offices
with wrong AUI settings, causing a lot of grief to us and the rest
of the group.  We can tell that the cause is probably an AUI
with wrong settings, but we have no way of telling which office we should go
to check the AUI.  We usually end up going from office to office,
one by one, and checking them.  We are anxious to find out
if there are any super-sniffers out there that can not only show
collisions, but identify their source as such-and-such connection
on such-and-such hub.
Such a device would save us a lot of grief, although my understanding
of IEEE802.3 says that it is probably impossible to build such a sniffer.

does anybody know anything on this matter?  We sure would appreciate
the input...
				Thanks in advance,
				Cetin Seren
		reply-to:       cs@karin.att.com

Newsgroups: comp.dcom.lans.misc
From: jsanchez@halcyon.com (Jim Sanchez)
Subject: Re: Fiber: Single or Multimode?
Organization: The 23:00 News and Mail Service +1 206 382 MAIL (382-6245)
X-Newsreader: Tin 1.1 PL4
Date: Fri, 18 Dec 1992 15:33:00 GMT

I can suggest that if you want to form a high-speed backbone style
internet on your campus you will want to put some single-mode fiber in
place.  One thing which certainly comes to mind is ATM.  Not that you
cannot run FDDI/ATM over multimode fibers but you are at the maximum
rate for that medium over moderate distances.  With single-mode you have
lots of growth room (both distance and speed). Given that the marginal
cost of including some extra single-mode fibers is almost negligable, I
think the decision is a no-brainer.  It would be for me anyway.
Your results may vary.
-- 
Jim Sanchez
Hughes LAN Systems jsanchez@halcyon.com
Kirkland, WA 98033 (206)828-7417 (voice) (206)828-2454 (FAX)
Newsgroups: comp.dcom.lans.misc
From: George Loftus <George_Loftus@Brown.Edu>
Newsgroups: comp.dcom.lans.misc
Subject: Re: hubs
Date: 14 Dec 1992 18:54:34 GMT
Organization: Brown University - CIS
Distribution: world
NNTP-Posting-Host: cis_staff-kntx21.cis.brown.edu
X-UserAgent: Nuntius v1.1.1d7
X-XXMessage-ID: <A7524190B502B06B@cis_staff-kntx21.cis.brown.edu>
X-XXDate: Mon, 14 Dec 92 18:50:08 GMT

Subject: hubs
From: Joubert Berger, joubert@teldata.UUCP
Date: 7 Dec 92 18:53:12 GMT
In article <663@teldata.UUCP> Joubert Berger, joubert@teldata.UUCP writes:
>We are going to install an ethernet network using 10BASE-T in the office.
>We are look at about 30 stations.  What would be a good hub?  I will 
>summarize, if interested.  Many thanks in advance.
>
>			    Joubert
>-- 
>Joubert Berger                   | Email:  
>Teldata Computer Industries, Inc.| joubert@teldata.uucp
>Atlanta, Georgia  (404) 256-2166 | joubert%teldata.uucp@mathcs.emory.edu
>                                 |
{rutgers,ogicse,gatech}!emory!teldata!joubert


There is a very good review of hubs on the market in the November 21
issue of Data Communications magazine (p. 56). For our part we have
standardized on the Synoptics product line. They have the flexibilty to
"daisy-chain" hubs, eliminating the need to make a large up front
investment in a chassis to provide expansion capability.

The review sites both Cabletron and Synoptics as very good vendors. The
tested six hub vendors.
From: fenton@iron.hq.aflc.af.mil (George I. Fenton)
Newsgroups: comp.dcom.lans.misc
Subject: Re: UTP or STP ?
Date: 11 Dec 92 14:42:43 GMT
Organization: U.S. Air Force Security Assistance Center (AFSAC)


hillmanp@topaz.ucq.edu.au writes:


>We are constructing an information technology building on campus,
>and are unsure whether to use UTP level 5 cabling or to use Shielded
>twisted pair.
>Our existing network uses a mixture of utp level 4 in buildings and
>co-ax,with optical fibre in high noise envirionments such as enginneering
>department. Interbuilding links are fibre with sufficient fibres to 
>upgrade to F.D.D.I. in the future.
>We want to install wiring with C.D.D.I. (100 Mb ps) capability although
>initially we will only be using 10 Mbps Ethernet.
> I have heard that STP may not perform as expected at 100 mbps and it may
>be just as effective ( and cheaper ) to use STP.
>I am aware that with STP great care must be taken to avoid ground loops
>in the shielding.
>Can anybody who has experience with using stp or utp or both at 100mbps
>advise?


>- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
>Peter Hillman,                                InfoPSI: p_hillman@ucq.edu.au
>Computing Services,                AARNet/Internet: p_hillman@topaz.ucq.edu.au
>University of Central Queensland,               Phone: +61 79 369410
>Rockhampton, Q 4702                             Fax: +61 79 361361
>Australia.                                    [DTE 050527372000077]
>- - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

I recommend level 5 UTP or STP, but the shielding aspects depends on your
application requirements.  FDDI over STP exists now, so you can travel
100Mb on the LAN.  However, you will need FDDI STP cards in your workstations,
which can get quite expensive per node.

100Mb over UTP should be introduced within 2 years, but the currect
pre-spec requirements are for Level 5 UTP.  We will be installing
Level 5 UTP here for a 635 node LAN, and we will use 10BaseT as the
present LAN topology configuration.  When 100Mb Ethernet comes out, 
all we have to do is change LAN cards at the workstation and concentrators
... the cabling will not have to be replaced.

We did not pick STP due to the complexity of shielding-grounding 
requirements.  We didn't want the electricians to start drilling
in the computer room floor.  --GIF
From: uad1123@dircon.co.uk (Graeme Lyall)
Newsgroups: comp.dcom.lans.misc
Subject: Back & Forth Net
Date: 21 Dec 92 00:36:00 GMT



I have just taken over responsibility for a Novell based LAN 
and I am thinking of running Back And Forth to let users
switch between applications.  Most of the workstations are 286s
with 640K.  Has anyone got experience of using B&F on a network 
and if so would you comment on how it worked out?  Also if
anyone has an email address for Progressive Solutions Inc that 
would be very useful.

Graeme Lyall
uad1123@dircon.co.uk
From: jack@cadre.dsl.pitt.edu (john p. nelson)
Newsgroups: comp.dcom.lans.misc
Subject: DOS, OS/2, MAC mixed networks
Summary: want experiences
Keywords: heterogenous networks
Date: 13 Dec 92 17:52:37 GMT
Reply-To: jack@nelslab.wpic.pitt.edu
X-Newsreader: TIN [version 1.1 PL8]

I am trying to get a 10BASE-T network set up for a small non-profit which
can allow DOS and OS/2 and MAC pc's to share printers & files on a server
(preferably UNIX based), and to have a SLIP or PPP link to a university site
so that students and faculty can have access to the university network and
the internet.  I suppose the SLIP could be across a fast modem link, but
maybe ISDN will be able to handle it eventually(?).  The number of pc's
is small (5-10) so it must be a reasonably low-cost solution.

Has anyone done such a network? Can you recommend any source (vendors,
consultants, etc.) who would do it without blinking? Does anyone have real
experience with DEC's Pathworks or other Lan Manager versions (NCR), in
particular the MAC services?

Jack
--
John P. Nelson, M.D., U. of Pittsurgh, Dept of Psychiatry
(412) 624-4802, 3811 O'Hara St, Pittsburgh PA 15213
jack@cadre.dsl.pitt.edu
Xref: sparky comp.dcom.lans:2034 comp.dcom.lans.ethernet:2845 comp.dcom.lans.misc:1067
From: paul@pphbau.atr.bso.nl (PPH Bauwens)
Newsgroups: comp.dcom.lans,comp.dcom.lans.ethernet,comp.dcom.lans.misc,comp.sys.ibm.pc.net
Subject: Re: 8-bit vs. 16-bit Ethernet
Date: 20 Dec 92 10:55:42 GMT
Followup-To: comp.dcom.lans,comp.dcom.lans.ethernet,comp.dcom.lans.misc,comp.sys.ibm.pc.net
Organization: Private Node
X-Newsreader: TIN [version 1.1 PL7]

John Wesley Herberg (herberj@prism.CS.ORST.EDU) wrote:
: 
: We're currently in the process of installing an ethernet & have the option 
: of 8-bit or 16-bit.  My question is, is there a signifactly noticable difference
: in performance?  Will it produce connectivity problems in the future?  If our

Go for 16-bit Ethernet cards!!! Performance should be about 25-35% better,
but the most important reason for buying 16-bit cards is the added flexibility
in configuring interrupts, the PC's weak spot.
8-bit cards can only access interrupt 1-7 where at most interrupt 2 and 5 are
available in most PC's. 16-bit cards can also access interrupt 10-15 of which
at least 2 are available.
Also note that most 16-bit ethernet cards can also be plugged in an 8-bit slot
and still work properly.

Stay away from the so called 'intelligent' ethernet cards, they need special
and hard to get drivers, which is especially a problem for UNIX.

I personally have very good experiences with the SMC8013EP  (formerly WD8013EP)
from Standard Microsystems Corporation.

If I had to choose I would ask for the following cards:

			1. SMC 8013 family (8013EP, EBT etc.)
			2. 3COM 3C503 family  

These cards are fairly inexpensive, give good performance and are very well
supported.  Most AT&T SVR4 UNIX vendors include drivers for both brands so
they will work out of the box!

Stay away from NE1000/NE2000 cards or clones not because these cards are
bad but because UNIX support for these cards is nonexistant to my knowledge!

The golden rule is:

FIRST check the availabity of DOS and UNIX drivers for the card you choose!!!

DO NOT BELIEVE promises of real soon now...

THEN decide if you still want to buy it...

Hope this helps. Happy computing :-)
-- 
--------------------------------------------------------------------------
Paul Bauwens				Email:	paul@pphbau.atr.bso.nl
Rietkerkweg 364					paul@pphbau.hobby.nl
3066VL Rotterdam  Nederland		Phone:	+31-10-4211858
Newsgroups: comp.dcom.lans,comp.dcom.lans.ethernet,comp.dcom.lans.misc,comp.unix.admin