Newsgroups: bit.listserv.big-lan
Date:         Tue, 25 Aug 1992 15:38:45 EDT
From:         BIG-REQ@SUVM.BITNET
Subject:      BIG-LAN Digest, Volume 4, Number 56, Tuesday, August 25, 1992

BIG-LAN DIGEST           Tuesday, 25 August 1992       Volume 4 : Issue 56

Today's Topics:

                                Crosstalk
               wondering about 10baseT hubs with filtering
                                Crosstalk
                                Crosstalk
                         ACM SIGUCCS Announcement

Moderated by John Wobus, Syracuse University

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----------------------------------------------------------------------

Date:    Fri, 21 Aug 1992 11:56:33 -0400 (EDT)
From:    "AMISPA::PASTORIUSRM"@alcoa.com
Subject:      Crosstalk

This is in reply to Jack Lubowsky
VDate:         Tue, 18 Aug 92 10:28:48 EST
From:         Jack Lubowsky <LUBOWSKY@SNYBKSAC>
Subject:      Crosstalk

A contractor has just wired our building with 10Base-T to the floors
from fiber risers. The 10Base-T cable (4 pair of #24) has been wired
through carrels in the labs alongside unshielded ac power cables. The
power cables are typical lab use lines (ie: not running heavy machinery)
and the runs can be as long as 20 feet.

Does anyone know whether there will be crosstalk problems sufficient to
reduce performance. The decision is, do we...
      1: leave things alone, it will probably be ok,
      2: move the twisted pair cable and power cable apart and secure
             with wire ties anywhere we can, (Could be labor intensive)
      3: require the contractor to pull back the twisted pair and rerun

Jack....
The first thing I would do is to check the specifications on you wire....
If it is the "good stuff" i.e.AT&T level 3 or 5 or some other similair
brand you may get away with it....I would recomend using a cable tester
such as a MicroTest Cable scanner, this device measures near end cross
talk. It will also tell you if your cable is suitable for 10baseT.
One thing I did when I designed the network in our building was to submit
a 200 ft piece of cable to our Hub vendor(SynOptics)they tested the cable
and verified that it would work...If I were in your situation I would tie-rap
and move cables if tests prove your cable isn't any good, I would then re-test.
If that doesn't work it's time to re-pull.....
Bob Pastoriu
Bob Pastorius
Network Technologist
ALCOA Pittsburgh,
Pa.

-------------------------------------------------------

Date: Fri, 21 Aug 1992 14:46 MST
From: smith_s@CUBLDR.Colorado.EDU
Subject:      wondering about 10baseT hubs with filtering

I work at the University of Colorado-Boulder, where we have a lot of
10BaseT equipment (mostly Cabletron).  Our ethernet backbone tends to
support a lot of different data types, including administrative data
regarding students grades, financials, etc.  For this reason we are
increasingly nervous about controllers with a monitoring ability being
plugged into a 10baseT jack, and this data being examined, or stolen
without our knowledge.

Among the options for dealing with this seem to a multi-port bridge device
that would prevent packets from being sent to "non-secure" jacks, by
filtering the frames on all jacks except for the one to the addressed
device.  The only device I have able to find (Kalpana) is very expensive.
Has anyone else considered solutions to this problem, and found one that is
affordable??

Scott Smith
Data Communications Manager, University of Colorado-Boulder

-------------------------------------------------------

Date: Fri, 21 Aug 1992 15:37 MST
From: smith_s@CUBLDR.Colorado.EDU
Subject:      Crosstalk
 ----------------------------------------------------------------------

- ----------------------------------------------------------------------

Date:         Tue, 18 Aug 92 10:28:48 EST
From:         Jack Lubowsky <LUBOWSKY@SNYBKSAC>
Subject:      Crosstalk

A contractor has just wired our building with 10Base-T to the floors
from fiber risers. The 10Base-T cable (4 pair of #24) has been wired
through carrels in the labs alongside unshielded ac power cables. The
power cables are typical lab use lines (ie: not running heavy machinery)
and the runs can be as long as 20 feet.

Does anyone know whether there will be crosstalk problems sufficient to
reduce performance. The decision is, do we...
      1: leave things alone, it will probably be ok,
      2: move the twisted pair cable and power cable apart and secure
             with wire ties anywhere we can, (Could be labor intensive)
      3: require the contractor to pull back the twisted pair and rerun
             to minimize proximity to power cable?

Any experiences or advice would be apreciated....Thanks
- ------------------------------------------------------------------------
Our experience at the University of Colorado would indicate that you should
rewire.  In several cases we've noted 10BaseT is sensitive to noise from
power cables.

Scott Smith
University of Colorado-Boulder

-------------------------------------------------------

Date: Fri, 21 Aug 92 21:16:04 -0700
From: woody@ucscb.UCSC.EDU (Bill Woodcock)
Subject:      Crosstalk

          LUBOWSKY@SNYBKSAC (Jack Lubowsky) writes:
        > A contractor has just wired our building with
        > 10Base-T cable (4 pair of #24) through carrels
        > in the labs alongside unshielded ac power cables.
        > The runs can be as long as 20 feet.
        > do we...
        >    1: leave things alone, it will probably be ok,
        >    2: move the twisted pair cable and power cable
        >       apart and secure with wire ties,
        >    3: require the contractor to rerun the twisted
        >       pair to minimize proximity to power cable?

    If you're using normal twisted pair cable with sufficient twists I
    don't think  the noise level on the 10Base-T is likely to become too
    high for your Ethernet cards to be able to perform noise rejection.
    I've never run telecom or network cable parallel to HVAC, so my
    knowledge is all second hand, but my understanding is that your big
    problem is going to be the possibility of the induced AC on the
    network damaging network cards.

    I know the guy who ran the cable plant for Transamerica, here in San
    Francisco, and they had problems getting between floors, because
    somebody had stuffed the risers full of HVAC.  They tried it, but
    fried several PCs in the first week, and decided to re-route all their
    vertical cable on the outside of the building.

    Just pulling the cables apart a bit probably won't do much.  If you're
    worried about it, and don't want to find out the hard way, either get
    some grounded shielding in around one of the two cable runs, or have
    the contractor re-pull.

                             -Bill Woodcock

_____________________________________________________________________
___________
bill woodcock  woody@zocalo.com  woody@applelink.apple.com
 woody@ucscb.ucsc.edu

-------------------------------------------------------

Date:         Tue, 25 Aug 92 09:00:45 EDT
From:         Al Herbert <HERBERT@AKRONVM>
Subject:      ACM SIGUCCS Announcement


 _______________________________________________________________________

              The Association for Computing Machinery's
Special Interest Group on University and College Computing Services
                   1992 User Services Conference

                 Welcome to America's North Coast!

You've been to the East Coast, the West Coast, and the Gulf Coast.  Now
come to Cleveland and see that we are building a city on the North Coast.
The 1992 ACM/SIGUCCS Planning Committee invites you to attend the
Twentieth SIGUCCS User Services Conference on Sunday, November 8th
thru Wednesday, November 11th.

Our theme is "Learning from the Past:  Stepping into the Future".  The
conference will focus on budgets, networking, and how these affect
User Services.  Share your experiences about maintaining and improving
services with a shrinking budget.  Learn what the future holds for
network services.

Our program is full of interesting presentations in all facets of
User Services.  We will keep you busy digesting new ideas and methods
to incorporate advanced technology.  But we will also provide you with
sufficient time to pursue concepts one-on-one with your peers.  For the
first time at a SIGUCCS Conference, we have included a Vendor Show.

If you have never attended a SIGUCCS Conference, you will be amazed at
how much information you will absorb during these four days.  Make
plans now to meet with us in November.

The Program  .........................................................

Keynote Speakers

Opening Speaker - Monday, November 9th

Dr. Mike Nelson authored the Congressional Bill which will create
the National Research and Education Network (NREN).  Mike will talk
about the purpose, timetable, and benefits associated with NREN.

Closing Speaker - Wednesday, November 11th

Gene Stanaland, "The Will Rogers of Economics" will sketch the economic
theories used by political leadership in Washington and discuss how the
interplay of such theories affect fiscal policies.  Such policies have
required changes in the business orientation of most colleges and
universities.

Special Session

The SIGUCCS Board of Directors will be presenting a Plenary Session
on "Opportunities in Adversity - Resource Allocations Issues:  Meeting
Increasing Demand with Shrinking Resources".

Presentations

Over 60 papers, workshops, and panel discussions will be presented by
computing services professionals from across North America.

Birds of a Feather

Sufficient time has been set aside for you to define your own topic areas
for informal discussions called BOFs.  The BOFs are scheduled during the
lunches and following the regularly scheduled afternoon sessions.

Vendor Show

On Tuesday, November 10th, in addition to the presentation tracks,
we will provide a Vendor Show.  Companies will display their latest
products both hardware and software.  The show is combined with a
buffet style lunch.  You will have plenty of time to browse through
the Vendor Display and munch from the food tables.  This Show will
run from 10 a.m. until 6 p.m.

TUTORIALS  ...........................................................

Class sizes are limited.  We strongly encourage you to enroll
early.  These tutorials will be presented from 1:00 to 5:00 p.m.
on Sunday, November 8th.

Tutorial I
- ----------

Architecting and Implementing a Campus Wide Information System

Description:  Campus Wide Information Systems (CWIS) are currently
very much a topic of discussion among campus administrators and
and computing organizations.  This tutorial will examine the evolution
of the CWIS phenomenon, and describe in detail what a CWIS is, how to
approach the decision to implement one, and how to implement once a
commitment is made.

Who Should Attend:  Both management and technical staff will benefit
from this tutorial; anyone in a position of decision making or
implementation regarding a CWIS.

Instructors:

Pete Percival, Manager - Academic Information Environment
Bob Eckert, Manager - Distributed Applications Development
Cathy Smith, Director - Program for Distributed Computing
All three presenters are currently leading the design and development
of Indiana University's new workstation-based client/server CWIS,
WISE (Workstation Information Services Environment).

TUTORIAL II
- -----------

Customer Service Techniques for Excellent Customer Service

Description:  For any user services professional, from entry-level to
management, customer service skills play a very important part of
his/her work.  We are surrounded by new technology, but our human
relations skills often determine the difference between a satisfied or
disgruntled user.  This tutorial will present powerful techniques for:
giving personal service, listening skills, telephone and e-mail
professionalism, understanding and handling complaints, style, and
avoiding burnout.  It will also present information and techniques for
building relationships, partnerships, and setting a service strategy.

Who Should Attend:  Management and entry-level professionals can benefit
from this tutorial.  It covers the importance of both internal
(coworkers and colleagues) and external customers (users).

Instructor:  John E. Bucher, Director of Computing Services,
University of South Dakota.  John is an accomplished speaker
with a wealth of "hands-on" experience in a variety of
customer service jobs.  He has presented customer service
techniques seminars to a wide variety of audiences.

TUTORIAL III
- ------------

Jargon Busting - An Introduction to the Technology of Data Networks

Description:  All of us deal with data networks on a day to
day basis, often without understanding all of what is going
on behind the curtains.  This tutorial will present an
overview of modern data networking with the objective of
demystifying the technology.  The basics of network design,
descriptions of the equipment used and some example networks
will be presented.  The Internet and its management will be
detailed as well as a discussion of network security.

Who Should Attend:  Anyone who is interested in understanding
the basic operation of multi-protocol data networks and their
components.  No technical background is assumed.

Instructor:  Scott Bradner is a consultant at the Harvard
Office of Information Technology, Network Service Division
where he works on the design and development of network-based
applications and is the director of the Harvard Network Device
Test Lab.  Scott has been involved in the design, operation
and use of data networks at Harvard University since the
early days of the ARPANET.  He was involved in the design of
the Harvard High-Speed Data Network (HSDN), the Longwood
Medical Area network (LMAnet) and the New England Academic
and Research network (NEARnet).  He is currently chair of the
technical committees of both LMAnet and NEARnet.

TUTORIAL IV
- -----------

STRESS:  What To Do When You Can't Run Away and Hide

Description:  It has been estimated that as much as 75% of
all medical complaints are related to stress.  Stress related
illness runs the gamut from acne to tension headaches.
Beyond the toll it takes on your body, stress adversely
affects your mental well-being, your productivity on the job
and your relationships with other people.  Stress can rob
your body of energy and your life of joy.  The purpose of
this workshop is to acquaint the participants with how stress
relates to physical health and more importantly to offer
suggestions and techniques for mastering the stress response.

Who Should Attend:  Anyone who is sick and tired of being
sick and tired.  Those whose medical records are as thick as
the New York City Yellow Pages.  Finally, everyone who firmly
believes that the world wouldn't be a bad place to live if
everyone else would just disappear.

Instructor:  Maureen Edwards, M.A., Ph.D. candidate, Stress
Management Coordinator at the University of Maryland Health
Center, College Park Campus.  In her role as stress
management coordinator, Maureen works with faculty, staff and
students on an individual basis for stress management
education.  In addition, Maureen conducts stress management
workshops campus wide and has also conducted workshops for
numerous Federal agencies and corporations.

For Conference Registration Information  ............................

We have set up an electronic distribution process for more information
about the Conference and Registration Forms.  Internet users should
send a mail message GET SIGUCCS PROGRAM to LISTSERV@VM1.CC.UAKRON.EDU.
BITNET users should place the text GET SIGUCCS PROGRAM in the body of
a mail message to LISTSERV@AKRONVM.  BITNET users will also be able to
issue the command interactively with a TELL or SEND command, depending
on whether they are on a CMS or VMS system

If you have any questions, please contact:

 Al Herbert,  Conference Chair    Dick Seivert,  Registration Chair
   University of Akron              University of Akron
   email:  herbert@uakron.edu       email:  seivert@uakron.edu
   phone:  (216)972-7174            phone:  (216)972-7181
   FAX:    (216)972-5238            FAX:    (216)972-5238

ACM SIGUCCS  .........................................................

The Association of Computing Machinery's (ACM) Special Interest Group
on University and College Computing Services (SIGUCCS) is one of the
ACM's organizational units devoted to the technical activities of its
members.

The SIGUCCS User Services Conferences emphasize practical ways to improve
improve services for those who use university and college computing
centers.

-------------------------------------------------------


End of BIG-LAN Digest
*********************
Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU