TELECOM Digest     Wed, 12 Oct 94 11:39:00 CDT    Volume 14 : Issue
394
 
Inside This Issue:                           Editor: Patrick A. 
Townson
 
     Summit '94: Technical Sessions (summit@ix.netcom.com)
     25 Years of Call Waiting (Jeffrey W. McKeough)
     Class Use of Telephone (Stuart Whitmore)
     UNC-CH Faculty Position Available (Scott Barker)
     900 MHz Cordless Phone Evaluations (Chris Campbell)
     NANP Nightmare (The Boston Globe via Van Hefner)
     Book Review: "The RS-232 Solution" by Campbell (Rob Slade)
     Request: New UK Dialing Codes (Adam Ashby)
     GSM SIM Card: Different? (Anto Daryanto)
 
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----------------------------------------------------------------------
 
From: summit@ix.netcom.com (Summit '94)
Subject: Summit '94: Technical Sessions
Date: 12 Oct 1994 05:14:54 GMT
Organization: Netcom
 
 
(T9) Managing High Speed Networks
 
Abstract: Broadband networking services are arriving rapidly.
Managing intelligent, flexible, high-speed networks demands new
management approaches. This half-day tutorial offers a unique
combination of a tutorial and a panel with leading vendors to
give you their perspective on their management offerings. Areas
covered include
 
* High-speed networks:SMDS, Frame Relay, BISDN, ATM
* Management Challenges, Problems, and Solutions
      Switched connections vs. datagrams
      Connection management systems
      Emerging virtualization
      Application management
* Customer Network Management:Rationale, Architecture, Functions,
   ATM, Frame Relay,SMDS, BISDN
* Panel Discussion: How to Deploy a Manageable High Speed Network
 
Instructor:
John McConnell, McConnell Consulting, Inc.
 
 
(S4) Expanding Your WAN: Strategies for Cost-Effective WAN
Expansion
 
Abstract: Wide area networks with inherent growth demands,
whether consistent or in spurts,present unique challenges to the
network designer. When adding new locations to a network, the
network designer must add them somewhat in their order of
arrival. However, if the new locations can be grouped, the
designer can achieve certain network efficiencies because of
greater optimization opportunities. This session shows you the
costs of different approaches.
 
Presenter:
Gary Schilling, Quintessential Solutions
 
 
(S7) Integrating the Workgroup and the Enterprise
 
Abstract: This session illustrates ways to provide enterprise
management capabilities for large centralized mainframe
environments, WAN/LAN management, and emerging workgroup, branch
office, home, and mobile computing environments. Topics covered
include:  Enterprise Management Consoles,  Infrastructure
Management Frameworks, Network and Systems Management Platforms,
LAN Management Platforms, Network Utilities, Network and System
Management Services.
 
Presenter:
Chris Thomas, Intel Corporation
 
 
(S9) Defining Response Time Service Levels on Inter-Networked
LANs and WANs
 
Abstract: In the "old" environments (single architectures and
protocols) you could monitor the  performance of network devices
as well as the response time "service levels" that your users
were receiving. However, performance management tools in "new"
multiprotocol, multi-vendor internetworks are limited to simply
managing devices not service levels. This lack of service level
data can cause peculiar and embarrassing problems for the IS
manager. This session shows how to develop a rich database of
users' response time data that will provide strategic information
for network designers.
 
Presenter:
Warren Sullivan, Network Telemetrics
 
 
(S17) Panel: Building and Managing Virtual Networks
 
Abstract: In an increasingly mobile world, managing change has become
one of the biggest administration headaches in a network.  The
evolution of switched LANs, TCP/IP, and management tools have opened
up the opportunity to integrate these technologies to build a network
that will dynamically adapt to network, applications and end-user
changes and demands. This session explores how to: unleash a new level
of power and flexibility through virtual networking; design and manage
virtual networks; dramatically reduce the cost of moves/adds/changes;
and reconfigure LANs through software control.
 
Moderator: Frank Hiatt, Chipcom Corporation
Panelists: David Fowler, FTP Software; Asheem Chandna, Synoptics
 
 
(S24) What the Heck Is a Protocol Analyzer Good for Anyway?
 
Abstract: As corporate networks continue to expand, distributed
analyzers will play a key role in monitoring network utilization,
traffic flow, and security across multiple subnets. This session
shows how network analyzers can isolate low level problems such
as errors due to faulty cable plant, packet congestion, jabbering
repeaters, malformed packets, as well as higher level problems
such as peer-to-peer or client/server networking software, host
configuration errors, traffic latency and timeout settings, and
routing errors.
 
Presenter:
Jeanne Abmayr, FTP Software
 
------------------------------
 
Date: Wed, 12 Oct 1994 02:02:42 -0400
From: marya@titan.ucs.umass.edu (jwm)
Subject: 25 Years of Call Waiting
Organization: University of Massachusetts, Amherst
 
 
Here's the text of a little card that I got in the mail from NYNEX:
 
[front]
 
Millions of people have already ordered Call Waiting.  Here's the
reason you should order yours today ...
 
[cartoon of an airplane carrying a banner stating: FREE INSTALLATION
UNTIL OCTOBER 31, 1994]
 
[back]
 
Discover why Call Waiting has been our most popular service for more
than 25 years.
 
A long-distance friend, an important business associate or a family
member during an emergency ... you wouldn't want any of these people 
to
be stranded listening to a busy signal.  For 25 years, NYNEX has
helped millions of people find the solution: Call Waiting.
 
Conversations with our customers have shown that most people don't
mind being put on hold.  In fact, they see an advantage in being able
to get through to you when you're already on the phone with someone
else.  Call Waiting costs just $2.58 a month.  And until October 31st
we're offering FREE installation.  (You'll save $7.60!)  So, don't let
anyone you care about ever feel stranded again.  Call and order today!
1-800-499-5200, Ext. 345, Mon. through Fri., 7 am - 9 pm; Saturday,
9 am - 3 pm.
 
NYNEX
NYNEX Recycles
 
[end of card]
 
1)  I wasn't aware that NYNEX did much of anything before 1984.  (O.K.
So I'm nitpicking.)
 
2)  I have an ad around here someplace from a 1967 National
Geographic, in which the Bell System promises a bold new future that
includes all of the custom calling features (call waiting, 3-way
calling, speed calling, and call forwarding).  Were these features
really deployed as early as 1969?  What switches at the time supported
them?  Did anyone out there have Call Waiting from New England
Telephone and Telegraph Co. in 1969?
 
3)  Nice spin on the people-love-to-hold thing.  Most people I know
hate to be on hold, but they figure that the benefit of getting
through outweighs the evil of holding.
 
4)  I have three lines.  Two of them have call waiting.  This was sent
to the billing address of one of those two lines.  Using recycled
paper is lovely, but if it serves no useful purpose it's still a
waste.  Perhaps they should cross-reference their marketing databases
with their billing databases to save a recycled tree.
 
5)  I always feel silly when I call a company, and they ask for an
"extension."  We all know that there is no need to transfer the call,
but I've run into cases where the rep was frozen in his/her tracks
when I couldn't come up with a pseudo-extension number for the record.
If they must track their advertising, why not use multiple 800
numbers, as the LD companies do in their TV ads?
 
 
Jeffrey W. McKeough     marya@titan.ucs.umass.edu
 
 
[TELECOM Digest Editor's Note: The earliest electronic switching 
system
installations were in 1968-69. It was installed somewhere in New 
Jersey
but the one I specifically recall was the initial test site in my part
of the country, in Morris, Illinois. The near north side neighborhood
in Chicago has ESS/Custom Calling features available in 1972, and the
downtown Chicago area had them available in 1973. At the time, my 
office
downtown was served by a very old panel office, or maybe it was a 
stepping
switch dating from the 1920's on the WEbster-9 exchange. I knew a 
couple
of people who had custom calling features in 1972 but can't think of 
anyone
before that. I had the features put on my phone once they became 
available
in 1973 (maybe 1974?).     PAT]
 
------------------------------
 
From: stuart.whitmore@uninova.com (Stuart Whitmore)
Subject: Class Use of Telephone
Date: Wed, 12 Oct 1994 05:20:59 GMT
Organization: UniNova Sup't BBS (509)925-3893
 
 
I had an interesting experience the other day in one of my classes
here at Central Washington University, and I figured others might also
find it noteworthy.  One of my professors brought into class one of
those conference telephones like you find in the Hello Direct catalog
(in fact, that might be where he got it, I don't know), and the whole
class made a call to a retired person who could speak as an authority
on the class topic.
 
I've never had a telephone used in a class like that before, but now I
think it's a great idea.  Students were able to get the benefit of
having a guest speaker without having him travel several hours just to
get to the CWU campus.  We generated some questions before calling, so
we didn't waste any long distance time, and it was a good experience.
 
I don't know how many teachers read the TELECOM Digest, but I 
recommend
this kind of experience for students.  It sure beats the old overhead
projector!  My prof mentioned that we'd be making more calls later in
the quarter, so he's apparently integrated it into his teaching beyond
just testing it out.
 
Anyway, I just figured it was an unusual use of telephones that was
worth sharing here.
 
 
Stuart Whitmore    (stuart.whitmore@uninova.com)
 
 
[TELECOM Digest Editor's Note: It certainly sounds like a great idea
for a presentation to a class; having authorities meet with the class
via speakerphone.    PAT]
 
------------------------------
 
From: scott@ils.unc.edu (Scott Barker)
Subject: UNC-CH Faculty Position Available
Date: 12 Oct 1994 14:31:39 GMT
Organization: Univ. of North Carolina, Information/Library Science
 
 
The University of North Carolina at Chapel Hill announces a tenure-
track
position (assistant/associate professor) in the School of Information
and Library Science.  The School seeks applications from scholars
whose research and teaching interests address telecommunications and
networking, and/or multimedia/hypermedia systems.  Faculty members are
expected to engage in research and to report new insights through
publication and teaching.  Faculty members also advise masters and
doctoral students and serve on School and University committees.
Minimum qualifications include an earned doctorate by the starting
date, a research agenda, and evidence of teaching competence.  Minimum
salary is $40,000 for assistant; $45,000 for associate.  The review
process will begin Jan.  15, 1995; preliminary interviews are planned
for the following conferences: ASIS (Alexandria, VA, October 1994);
ALISE (Philadelphia, February 1995); and ACM Computer Science
Conference (Nashville, TN, February 1995).  Applications will be
accepted until the position is filled.  Preferred starting date is
August 1995.  Send letter of application, resume, and names of three
references to:
 
Barbara M. Wildemuth, Chair, Faculty Search Committee
School of Information and Library Science
CB # 3360, 100 Manning Hall
University of North Carolina at Chapel Hill
Chapel Hill, NC 27599-3360
Phone:  919-962-8366; Fax:  919-962-8071
email:  wildem@ils.unc.edu
 
The University of North Carolina at Chapel Hill is an affirmative
action, equal opportunity employer.
 
------------------------------
 
From: dsrekcc@prism.gatech.edu (Chris Campbell)
Subject: 900 MHz Cordless Phone Evaluations
Date: 11 Oct 1994 01:08:58 -0400
Organization: Georgia Institute of Technology
 
 
About a month ago I put out a call on the net for your comments and
experiences with 900 MHz cordless phones.  The following is what I
finally distilled out of those responses.  Note that these are actual
experiences, not rumor or manafacturer's claims (nor mine).  If your
phone does not exhibit the performance problem indicated here, well,
great.
 
Below is a table of some basic performance comments, followed by more
lengthy comments on each model.  I received over 2000 lines of 
comments,
and have edited that down to 1200+ lines (~60K).  Since posting those
comments would be an ENORMOUS waste of bandwidth, I will e-mail a copy
of that file to whoever really wants it.
 
If you have comments about your experiences with your phone, e-mail me
and I will include it in the final draft of this.  I am of course
interested in data that is absent in the table below (e.g. Uniden 
duration).
Please don't e-mail just to "ditto" comments made here.  Thanks.
 
 
                                                       Talk    Handset
MODEL             #R  SS   Sound Quality  Range (ft) Duration   Size
 
AT&T   9100/9120   5  Yes   hissy, tinny    "Good"              Wide
BEL    900         1  No   crystal clear   "1 block"
Escort 9000/9020   4  Yes   good, crappy              2.0 hrs
Panas. 9000/9220   6  No     excellent     "few 100"  0.5 hrs   Flip
Sony   SPP-ER1     1  No                                         Big
Tropez 900 DL/DX  15  No* noisy, artifacts 300-1000   1.5 hrs 
Difficult
Uniden 9100/9200  13  Yes  good but echo      500               Good
 
#R : Number of responses I got about this phone
SS : Spread spectrum encoded - This means that you're not broadcasting
      your voice across the neighborhood, for all scanners to hear.
      While a few people might be able to decipher it now, and some
      scanners may do it in the future, you are at least secure from
      95% of the "snoopers" out there.  Me included.
      If it's not SS, then you can pick it up with a simple scanner.


COMMENTS:

AT&T
- 9120 is a speakerphone
- AT&T phone is OEM'd from VTech, the company that makes the Tropez.
   The ergonomics are better, but the performance is about the same.

Escort
- The "good, crappy" comment in the table means I got conflicting
  responses.
 
Panasonic
- Flip-phone style
- Dual batteries; extra battery does NOT power base in power outage.
 
Tropez
Note:  while many people disliked the Tropez, some vehemently,
  I should say that I received a few responses defending it.
- 900 DX is a speakerphone
- Range is apparently very good, at 1000 feet or more.
- The Tropez models are NOT spread spectrum.  They use a single 
channel
   16 kHz PCM signal about 100 kHz wide.  While this means that Joe
   Scanner can't pick up an easy FM signal, it also means that it is 
not
   quite the level of security offered by spread spectrum.  The 
digitized
   audio is apparently coded to a random, shifting key (64K 
combinations),
   so interception is still unlikely.  On a plain scanner,  your voice 
is
   indeed unrecognizable (digital).
- It has been reported that clear audio (FM) leaks at around 430 MHz.
 
Uniden
- 9200 is two-line speakerphone with ability to charge extra battery.
   Extra battery WILL power base in power outage.
- Almost everyone liked their Uniden, except for the echo.
   The echo (and some said clipping and distortion) appears only in
   your earpiece;  the other person can't hear it, although you may
   find it very irritating.
 
 
Miscellaneous
 
- Radio Shack and NorthWestern Bell models are possibly OEM'd, but I 
have
   conflicting information on that.  They are apparently not spread 
spectrum,
   but just broadcast your audio in the clear (FM).
 
- Motorola makes a 49 MHz cordless phone that reverses the audio into
   something unrecognizable on scanner.  There's one of these in my
   neighborhood; a plain scanner won't work on it, but it is pretty 
simple
   to build a circuit to un-reverse the audio (see rec.radio.scanner).
   The Motorola 49 Mhz apparently goes for around $400.
 
- From the  FAF - Frequently Asked Frequencies  file on 
oak.oakland.edu -
 
     Panasonic KX-T9000   base     902.100-903.870     { 60 channels
                          handset  926.100-927.870     { 30 kHz 
spacing
 
     VTech Tropez 900DX   base     905.600-907.500     { 20 channels
          (digital)       handset  925.500-927.400     {100 kHz 
spacing
 
     AT&T #9120             902.0-905.0  /  925.0-928.0   }
     OTRON CORP. #CP-1000   902.1-903.9  /  926.1-927.9   } 
unconfirmed
     SAMSUNG #SP-R912       903.0        /  927.0         }
 
 
Chris Campbell      dsrekcc@prism.gatech.edu
 
------------------------------
 
Date: Tue, 11 Oct 94 00:20:54 PDT
Reply-To: vantek@sequoia.northcoast.com (Van Hefner)
From: vantek@sequoia.northcoast.com (Van Hefner)
Subject: NANP Nightmare
 
 
Boston Business Misses Phone Calls Due to Bungled Exchange
By Alex Pham, {The Boston Globe}
 
  Oct. 8 -- Lori Moretti lives to hear the phone ring. But since she
recently moved her public relations firm to its new Boston locale near
Fort Point Channel, the lines have been unusually quiet.
 
The six-member crew of her firm, CM Communications, weren't used to
sitting through long stretches of silence. First they blamed the
weather, then the economy, then the time of year. Eventually they
found out why. Few businesses they dealt with were able to dial the
company's new exchange (the first three digits of their telephone
number).
 
  "We kept getting complaints that people couldn't reach us," Moretti 
said.
"They had to get an operator to reach us. So we called Nynex, and they 
told
us that it was because our phone number was a new exchange."
 
  Many of the high-tech phone systems at area companies, including 
some
that CM said were vital to its business such as the Boston Phoenix,
The Boston Globe and the Hynes Convention Center, simply didn't
recognize the new 946 exchange as a valid number.
 
"That was ridiculous," moaned Moretti. "Here we are, a public 
relations
firm, and two of the city's biggest newspapers couldn't call us."
 
She and her business partner, Michael Caglianone, gave Nynex an
earful. But the phone company insisted that the number was a "viable
exchange."
 
"Well, bottom line is it hasn't been a viable exchange for our
business," said Moretti, who estimates it would cost more than $5,000
to switch back to an established exchange when the cost of reprinting
stationary, business cards and adress notifications are included. "To
this day, I lie awake at night wondering what calls we've never
gotten. How many businesses are out there with that exchange? Are they
not getting calls, too?"
 
Nynex officials concede there have been some problems with the new 
exchange
but contend most businesses were not adversely affected. They said CM 
and
other companies with the new exchange really didn't miss that many 
calls and
the problems have been corrected.
 
The phone company said that 4,000 of its customers were recently 
issued the
new 946 exchange. Whenever a new exchange is created, residential 
customers
and businesses that use Nynex phone equipment are automatically 
programmed
to recognize the new numbers. But businesses that don't use Nynex
equipment must individually program their machines to accept the new
exchanges. Should human error cause an exchange to be missed, calls to
that exchange will not connect.
 
Oddly enough, technological progress may be the root of the problem.
Because of the explosion of pagers, FAX machines, cellular phones,
modems and online services, Nynex is being flooded with unprecedented
demand for new numbers.  There are 12.1 million phone numbers in use
in Massachusetts, a 2.5 percent increase in the last quarter alone,
said Susan Butta, a Nynex spokeswoman.  That means one to two new
exchanges must be added within the 617 and 508 area code each month to
handle the new numbers.
 
The demand for new numbers has also led Nynex to introduce an added
layer of complexity. Beginning next Saturday, callers making a toll
call within their area code must dial 1, the area code, then the
seven-digit phone number.  Thus, a caller in Boston must dial 617
first when they call Woburn, even though Woburn is still within the
617 area code. Now callers just dial 1 plus the phone number.
 
Confusing? "The irony in all this was that Nynex went out of its way
to give us a number that was easy to remember and easy to dial,"
Moretti said.
 
 
Van Hefner * VANTEK COMMUNICATIONS  *  Eureka, California  *
 
 
[TELECOM Digest Editor's Note: NYNEX cannot really be blamed because
the proprietors of some private phone systems at large companies,
universities, etc are klutzes. People wanted a telephone network where
everyone did thier own thing, so that's what they got now over ten
years ago. I used to work for a large department store downtown on a
part time basis trying to straighten out the mess that predecessors
had made of the Rolm PBX there. It was a mess!  There were lots of
exchanges they could not dial. The fact that the situation described
in this newspaper account is quite common when new exchanges are cut
in is not the fault of telco. If you want to run a PBX or a large
private phone service, then you either know what you are doing or step
out of the way and let someone else do it. Oh, I suppose it is easier
to just ignore complaints and treat the users like ignoramuses and
crackpots.  Sometimes the telcos do not communicate with each other
as they should though ... a case about five years ago involved a new
exchange cut in by a telco in Wisconsin. Illinois Bell did not have
it in their tables for several months afterward, and no amount of
talking could get anyone at IBT to listen. Finally someone at AT&T
twisted their arm, and found someone at IBT who understood what was
wrong. So yes, it can be telco's fault where other telco's are
concerned. I would not be surprised if there are people in other
parts of the USA who are unable to get the 946 prefix discussed simply
because their telco was not up to date. But still, where local
service is concerned, the guys who run the private phone systems are
the ones who need to get their act together.   PAT]
 
------------------------------
 
Date: Wed, 12 Oct 1994 00:41:38 EST
From: Rob Slade <roberts@decus.ca>
Subject: Book Review: "The RS-232 Solution" by Campbell
 
 
BKRS2SOL.RVW  940811
 
Sybex Computer Books
2021 Challenger Drive
Alameda, CA   94501  USA
510-523-8233  800-227-2346
Fax: 510-523-2373
or
Firefly Books
250 Sparks Avenue
Willowdale, Ontario M2H 2S4
416-499-8412  Fax: 416-499-8313
"The RS-232 Solution", Campbell, 1989, 0-89588-488-7, U$24.95/C$32.95
 
Most computer users, even those dealing with communications and
modems, will not have to deal with the intricacies of the RS-232 (or
EIA-232E) interface standard for serial communications.  You buy a
cable, plug in the modem, and that's the end of it.  For those who do
want to know more, this book is fascinating -- as well as being
completely accessible for the non-technical reader.
 
Part one deals with the interface, reasons for an interface standard,
and the general concepts and tools needed to attack an interface
problem.  Part two is primarily a series of "case studies" and
specialized examples.  Interestingly, Campbell nowhere gives a full
listing of the RS-232 pin assignments, concentrating on the "Big
Eight" which do form the foundation of almost all serial 
communications.
The chapter on the Mac is most interesting -- the Mac does not have
an RS-232 port, relying instead on a subset of the EIA-422 standard.
Some notes are odd, however.  The juxtaposition of a marginal note
complaining about the IBM PC asynchronous (serial) port is placed,
without comment, next to a discussion of male and female connector
assignments.  Read carefully, it indicates that IBM was right, but it
may confuse some readers.
 
Those who want the full technical details of the interface
specification will have to get them elsewhere.  Few will want as much
detail on printers as is given here.  For those hobbyists truly
interested in the interface, this is an intriguing, and potentially
quite useful, source.
 
copyright Robert M. Slade, 1994   BKRS2SOL.RVW  940811. Distribution
permitted in TELECOM Digest and associated newsgroups/mailing lists.
 
 
Vancouver      ROBERTS@decus.ca
Institute for  Robert_Slade@sfu.ca
Research into  rslade@cue.bc.ca
User           p1@CyberStore.ca
Security       Canada V7K 2G6
 
------------------------------
 
Date: Tue, 11 Oct 1994 10:49:00 +0100
From: adam ashby <adama@bnr.ca>
Subject: Request: New UK Dialing Codes
 
 
The new UK dialing codes (prefixing all current codes with 1, plus a
couple of entirely new codes) are now in operation and have been since
August 1st.
 
I was wondering if anyone has yet updated the UK area codes and made
them available.  The archives have the old codes, but with reference
to the new codes.  I could easily edit the old file - just wondering
if anyone else had already done it.
 
As a related aside -- all NT DMS switches in the UK were ready for the
new codes before August 1st.
 
And another one - OfTel (the regulatory body) is currently discussing 
a new
(proposed) numbering plan for the UK :-
 
   00 - International (current)
   01 - PSTN (current)
   02 - possible netowrk expansion (new)
   03 - New mobile allocations (new)
   04 - New mobile allocations (new)
   05 - FreePhone numbers (new)
   06 - FreePhone numbers (new)
   07 - Personal numbers (new) - what are those???
   08 - Premium rate (new)
   09 - Premium rate (new)
 
 
Adam Ashby      | 1560442@bnr.ca  | BNR Europe Ltd.
+44 1628 794622 |      FAX        | Maidenhead,
ESN 590 4622    | +44 1628 794381 | England, SL6 4AG
 
------------------------------
 
From: anto@anggrek.inn.bppt.go.id (Anto Daryanto)
Subject: GSM SIM Card: Different?
Date: 11 Oct 1994 20:37:11 -0500
Organization: UTexas Mail-to-News Gateway
 
 
Hi,
 
I just talked to the Motorola GSM handphone provider in Jakarta (PT
Satelindo) about their new service offering, GSM network in Jakarta.
They said that to be able to use their handphone (Motorola 5200 and
7200) you have to use SIM card, OK, it's all right. But then they said
that their SIM card can not be used in other handphone, such as
Phillips, as they informed me.
 
Is this true? As I understand, with only one SIM card you can use any
GSM handphone in any country (of course as long as the countries have
roaming agreement).
 
 
Antonius Daryanto   |  Direktorat TEI
a.daryanto@inn.bppt.go.id |  BPPT Teknologi
        |  Jakarta, INDONESIA
 
------------------------------
 
End of TELECOM Digest V14 #394
****************************
 


------------------------------------------------------------------------
Date: 10-12-94                         Msg # 579487 
From: TELECOM Digest (Patrick          Conf: (700) email
  To: ELIOT GELWAN                     Stat: Private
Subj: TELECOM Digest V14 #394          Read: No
------------------------------------------------------------------------
From: telecom@delta.eecs.nwu.edu (TELECOM Digest (Patrick Townson))
 
 
TELECOM Digest     Wed, 12 Oct 94 11:39:00 CDT    Volume 14 : Issue 
394
 
Inside This Issue:                           Editor: Patrick A. 
Townson
 
     Summit '94: Technical Sessions (summit@ix.netcom.com)
     25 Years of Call Waiting (Jeffrey W. McKeough)
     Class Use of Telephone (Stuart Whitmore)
     UNC-CH Faculty Position Available (Scott Barker)
     900 MHz Cordless Phone Evaluations (Chris Campbell)
     NANP Nightmare (The Boston Globe via Van Hefner)
     Book Review: "The RS-232 Solution" by Campbell (Rob Slade)
     Request: New UK Dialing Codes (Adam Ashby)
     GSM SIM Card: Different? (Anto Daryanto)
 
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----------------------------------------------------------------------
 
From: summit@ix.netcom.com (Summit '94)
Subject: Summit '94: Technical Sessions
Date: 12 Oct 1994 05:14:54 GMT
Organization: Netcom
 
 
(T9) Managing High Speed Networks
 
Abstract: Broadband networking services are arriving rapidly.
Managing intelligent, flexible, high-speed networks demands new
management approaches. This half-day tutorial offers a unique
combination of a tutorial and a panel with leading vendors to
give you their perspective on their management offerings. Areas
covered include
 
* High-speed networks:SMDS, Frame Relay, BISDN, ATM
* Management Challenges, Problems, and Solutions
      Switched connections vs. datagrams
      Connection management systems
      Emerging virtualization
      Application management
* Customer Network Management:Rationale, Architecture, Functions,
   ATM, Frame Relay,SMDS, BISDN
* Panel Discussion: How to Deploy a Manageable High Speed Network
 
Instructor:
John McConnell, McConnell Consulting, Inc.
 
 
(S4) Expanding Your WAN: Strategies for Cost-Effective WAN
Expansion
 
Abstract: Wide area networks with inherent growth demands,
whether consistent or in spurts,present unique challenges to the
network designer. When adding new locations to a network, the
network designer must add them somewhat in their order of
arrival. However, if the new locations can be grouped, the
designer can achieve certain network efficiencies because of
greater optimization opportunities. This session shows you the
costs of different approaches.
 
Presenter:
Gary Schilling, Quintessential Solutions
 
 
(S7) Integrating the Workgroup and the Enterprise
 
Abstract: This session illustrates ways to provide enterprise
management capabilities for large centralized mainframe
environments, WAN/LAN management, and emerging workgroup, branch
office, home, and mobile computing environments. Topics covered
include:  Enterprise Management Consoles,  Infrastructure
Management Frameworks, Network and Systems Management Platforms,
LAN Management Platforms, Network Utilities, Network and System
Management Services.
 
Presenter:
Chris Thomas, Intel Corporation
 
 
(S9) Defining Response Time Service Levels on Inter-Networked
LANs and WANs
 
Abstract: In the "old" environments (single architectures and
protocols) you could monitor the  performance of network devices
as well as the response time "service levels" that your users
were receiving. However, performance management tools in "new"
multiprotocol, multi-vendor internetworks are limited to simply
managing devices not service levels. This lack of service level
data can cause peculiar and embarrassing problems for the IS
manager. This session shows how to develop a rich database of
users' response time data that will provide strategic information
for network designers.
 
Presenter:
Warren Sullivan, Network Telemetrics
 
 
(S17) Panel: Building and Managing Virtual Networks
 
Abstract: In an increasingly mobile world, managing change has become
one of the biggest administration headaches in a network.  The
evolution of switched LANs, TCP/IP, and management tools have opened
up the opportunity to integrate these technologies to build a network
that will dynamically adapt to network, applications and end-user
changes and demands. This session explores how to: unleash a new level
of power and flexibility through virtual networking; design and manage
virtual networks; dramatically reduce the cost of moves/adds/changes;
and reconfigure LANs through software control.
 
Moderator: Frank Hiatt, Chipcom Corporation
Panelists: David Fowler, FTP Software; Asheem Chandna, Synoptics
 
 
(S24) What the Heck Is a Protocol Analyzer Good for Anyway?
 
Abstract: As corporate networks continue to expand, distributed
analyzers will play a key role in monitoring network utilization,
traffic flow, and security across multiple subnets. This session
shows how network analyzers can isolate low level problems such
as errors due to faulty cable plant, packet congestion, jabbering
repeaters, malformed packets, as well as higher level problems
such as peer-to-peer or client/server networking software, host
configuration errors, traffic latency and timeout settings, and
routing errors.
 
Presenter:
Jeanne Abmayr, FTP Software
 
------------------------------
 
Date: Wed, 12 Oct 1994 02:02:42 -0400
From: marya@titan.ucs.umass.edu (jwm)
Subject: 25 Years of Call Waiting
Organization: University of Massachusetts, Amherst
 
 
Here's the text of a little card that I got in the mail from NYNEX:
 
[front]
 
Millions of people have already ordered Call Waiting.  Here's the
reason you should order yours today ...
 
[cartoon of an airplane carrying a banner stating: FREE INSTALLATION
UNTIL OCTOBER 31, 1994]
 
[back]
 
Discover why Call Waiting has been our most popular service for more
than 25 years.
 
A long-distance friend, an important business associate or a family
member during an emergency ... you wouldn't want any of these people 
to
be stranded listening to a busy signal.  For 25 years, NYNEX has
helped millions of people find the solution: Call Waiting.
 
Conversations with our customers have shown that most people don't
mind being put on hold.  In fact, they see an advantage in being able
to get through to you when you're already on the phone with someone
else.  Call Waiting costs just $2.58 a month.  And until October 31st
we're offering FREE installation.  (You'll save $7.60!)  So, don't let
anyone you care about ever feel stranded again.  Call and order today!
1-800-499-5200, Ext. 345, Mon. through Fri., 7 am - 9 pm; Saturday,
9 am - 3 pm.
 
NYNEX
NYNEX Recycles
 
[end of card]
 
1)  I wasn't aware that NYNEX did much of anything before 1984.  (O.K.
So I'm nitpicking.)
 
2)  I have an ad around here someplace from a 1967 National
Geographic, in which the Bell System promises a bold new future that
includes all of the custom calling features (call waiting, 3-way
calling, speed calling, and call forwarding).  Were these features
really deployed as early as 1969?  What switches at the time supported
them?  Did anyone out there have Call Waiting from New England
Telephone and Telegraph Co. in 1969?
 
3)  Nice spin on the people-love-to-hold thing.  Most people I know
hate to be on hold, but they figure that the benefit of getting
through outweighs the evil of holding.
 
4)  I have three lines.  Two of them have call waiting.  This was sent
to the billing address of one of those two lines.  Using recycled
paper is lovely, but if it serves no useful purpose it's still a
waste.  Perhaps they should cross-reference their marketing databases
with their billing databases to save a recycled tree.
 
5)  I always feel silly when I call a company, and they ask for an
"extension."  We all know that there is no need to transfer the call,
but I've run into cases where the rep was frozen in his/her tracks
when I couldn't come up with a pseudo-extension number for the record.
If they must track their advertising, why not use multiple 800
numbers, as the LD companies do in their TV ads?
 
 
Jeffrey W. McKeough     marya@titan.ucs.umass.edu
 
 
[TELECOM Digest Editor's Note: The earliest electronic switching 
system
installations were in 1968-69. It was installed somewhere in New 
Jersey
but the one I specifically recall was the initial test site in my part
of the country, in Morris, Illinois. The near north side neighborhood
in Chicago has ESS/Custom Calling features available in 1972, and the
downtown Chicago area had them available in 1973. At the time, my 
office
downtown was served by a very old panel office, or maybe it was a 
stepping
switch dating from the 1920's on the WEbster-9 exchange. I knew a 
couple
of people who had custom calling features in 1972 but can't think of 
anyone
before that. I had the features put on my phone once they became 
available
in 1973 (maybe 1974?).     PAT]
 
------------------------------
 
From: stuart.whitmore@uninova.com (Stuart Whitmore)
Subject: Class Use of Telephone
Date: Wed, 12 Oct 1994 05:20:59 GMT
Organization: UniNova Sup't BBS (509)925-3893
 
 
I had an interesting experience the other day in one of my classes
here at Central Washington University, and I figured others might also
find it noteworthy.  One of my professors brought into class one of
those conference telephones like you find in the Hello Direct catalog
(in fact, that might be where he got it, I don't know), and the whole
class made a call to a retired person who could speak as an authority
on the class topic.
 
I've never had a telephone used in a class like that before, but now I
think it's a great idea.  Students were able to get the benefit of
having a guest speaker without having him travel several hours just to
get to the CWU campus.  We generated some questions before calling, so
we didn't waste any long distance time, and it was a good experience.
 
I don't know how many teachers read the TELECOM Digest, but I 
recommend
this kind of experience for students.  It sure beats the old overhead
projector!  My prof mentioned that we'd be making more calls later in
the quarter, so he's apparently integrated it into his teaching beyond
just testing it out.
 
Anyway, I just figured it was an unusual use of telephones that was
worth sharing here.
 
 
Stuart Whitmore    (stuart.whitmore@uninova.com)
 
 
[TELECOM Digest Editor's Note: It certainly sounds like a great idea
for a presentation to a class; having authorities meet with the class
via speakerphone.    PAT]
 
------------------------------
 
From: scott@ils.unc.edu (Scott Barker)
Subject: UNC-CH Faculty Position Available
Date: 12 Oct 1994 14:31:39 GMT
Organization: Univ. of North Carolina, Information/Library Science
 
 
The University of North Carolina at Chapel Hill announces a tenure-
track
position (assistant/associate professor) in the School of Information
and Library Science.  The School seeks applications from scholars
whose research and teaching interests address telecommunications and
networking, and/or multimedia/hypermedia systems.  Faculty members are
expected to engage in research and to report new insights through
publication and teaching.  Faculty members also advise masters and
doctoral students and serve on School and University committees.
Minimum qualifications include an earned doctorate by the starting
date, a research agenda, and evidence of teaching competence.  Minimum
salary is $40,000 for assistant; $45,000 for associate.  The review
process will begin Jan.  15, 1995; preliminary interviews are planned
for the following conferences: ASIS (Alexandria, VA, October 1994);
ALISE (Philadelphia, February 1995); and ACM Computer Science
Conference (Nashville, TN, February 1995).  Applications will be
accepted until the position is filled.  Preferred starting date is
August 1995.  Send letter of application, resume, and names of three
references to:
 
Barbara M. Wildemuth, Chair, Faculty Search Committee
School of Information and Library Science
CB # 3360, 100 Manning Hall
University of North Carolina at Chapel Hill
Chapel Hill, NC 27599-3360
Phone:  919-962-8366; Fax:  919-962-8071
email:  wildem@ils.unc.edu
 
The University of North Carolina at Chapel Hill is an affirmative
action, equal opportunity employer.
 
------------------------------
 
From: dsrekcc@prism.gatech.edu (Chris Campbell)
Subject: 900 MHz Cordless Phone Evaluations
Date: 11 Oct 1994 01:08:58 -0400
Organization: Georgia Institute of Technology
 
 
About a month ago I put out a call on the net for your comments and
experiences with 900 MHz cordless phones.  The following is what I
finally distilled out of those responses.  Note that these are actual
experiences, not rumor or manafacturer's claims (nor mine).  If your
phone does not exhibit the performance problem indicated here, well,
great.
 
Below is a table of some basic performance comments, followed by more
lengthy comments on each model.  I received over 2000 lines of 
comments,
and have edited that down to 1200+ lines (~60K).  Since posting those
comments would be an ENORMOUS waste of bandwidth, I will e-mail a copy
of that file to whoever really wants it.
 
If you have comments about your experiences with your phone, e-mail me
and I will include it in the final draft of this.  I am of course
interested in data that is absent in the table below (e.g. Uniden 
duration).
Please don't e-mail just to "ditto" comments made here.  Thanks.
 
 
                                                       Talk    Handset
MODEL             #R  SS   Sound Quality  Range (ft) Duration   Size
 
AT&T   9100/9120   5  Yes   hissy, tinny    "Good"              Wide
BEL    900         1  No   crystal clear   "1 block"
Escort 9000/9020   4  Yes   good, crappy              2.0 hrs
Panas. 9000/9220   6  No     excellent     "few 100"  0.5 hrs   Flip
Sony   SPP-ER1     1  No                                         Big
Tropez 900 DL/DX  15  No* noisy, artifacts 300-1000   1.5 hrs 
Difficult
Uniden 9100/9200  13  Yes  good but echo      500               Good
 
#R : Number of responses I got about this phone
SS : Spread spectrum encoded - This means that you're not broadcasting
      your voice across the neighborhood, for all scanners to hear.
      While a few people might be able to decipher it now, and some
      scanners may do it in the future, you are at least secure from
      95% of the "snoopers" out there.  Me included.
      If it's not SS, then you can pick it up with a simple scanner.
 
 
COMMENTS:
 
AT&T
- 9120 is a speakerphone
- AT&T phone is OEM'd from VTech, the company that makes the Tropez.
   The ergonomics are better, but the performance is about the same.
 
Escort
- The "good, crappy" comment in the table means I got conflicting
  responses.
 
Panasonic
- Flip-phone style
- Dual batteries; extra battery does NOT power base in power outage.
 
Tropez
Note:  while many people disliked the Tropez, some vehemently,
  I should say that I received a few responses defending it.
- 900 DX is a speakerphone
- Range is apparently very good, at 1000 feet or more.
- The Tropez models are NOT spread spectrum.  They use a single 
channel
   16 kHz PCM signal about 100 kHz wide.  While this means that Joe
   Scanner can't pick up an easy FM signal, it also means that it is 
not
   quite the level of security offered by spread spectrum.  The 
digitized
   audio is apparently coded to a random, shifting key (64K 
combinations),
   so interception is still unlikely.  On a plain scanner,  your voice 
is
   indeed unrecognizable (digital).
- It has been reported that clear audio (FM) leaks at around 430 MHz.
 
Uniden
- 9200 is two-line speakerphone with ability to charge extra battery.
   Extra battery WILL power base in power outage.
- Almost everyone liked their Uniden, except for the echo.
   The echo (and some said clipping and distortion) appears only in
   your earpiece;  the other person can't hear it, although you may
   find it very irritating.
 
 
Miscellaneous
 
- Radio Shack and NorthWestern Bell models are possibly OEM'd, but I 
have
   conflicting information on that.  They are apparently not spread 
spectrum,
   but just broadcast your audio in the clear (FM).
 
- Motorola makes a 49 MHz cordless phone that reverses the audio into
   something unrecognizable on scanner.  There's one of these in my
   neighborhood; a plain scanner won't work on it, but it is pretty 
simple
   to build a circuit to un-reverse the audio (see rec.radio.scanner).
   The Motorola 49 Mhz apparently goes for around $400.
 
- From the  FAF - Frequently Asked Frequencies  file on 
oak.oakland.edu -
 
     Panasonic KX-T9000   base     902.100-903.870     { 60 channels
                          handset  926.100-927.870     { 30 kHz 
spacing
 
     VTech Tropez 900DX   base     905.600-907.500     { 20 channels
          (digital)       handset  925.500-927.400     {100 kHz 
spacing
 
     AT&T #9120             902.0-905.0  /  925.0-928.0   }
     OTRON CORP. #CP-1000   902.1-903.9  /  926.1-927.9   } 
unconfirmed
     SAMSUNG #SP-R912       903.0        /  927.0         }
 
 
Chris Campbell      dsrekcc@prism.gatech.edu
 
------------------------------
 
Date: Tue, 11 Oct 94 00:20:54 PDT
Reply-To: vantek@sequoia.northcoast.com (Van Hefner)
From: vantek@sequoia.northcoast.com (Van Hefner)
Subject: NANP Nightmare
 
 
Boston Business Misses Phone Calls Due to Bungled Exchange
By Alex Pham, {The Boston Globe}
 
  Oct. 8 -- Lori Moretti lives to hear the phone ring. But since she
recently moved her public relations firm to its new Boston locale near
Fort Point Channel, the lines have been unusually quiet.
 
The six-member crew of her firm, CM Communications, weren't used to
sitting through long stretches of silence. First they blamed the
weather, then the economy, then the time of year. Eventually they
found out why. Few businesses they dealt with were able to dial the
company's new exchange (the first three digits of their telephone
number).
 
  "We kept getting complaints that people couldn't reach us," Moretti 
said.
"They had to get an operator to reach us. So we called Nynex, and they 
told
us that it was because our phone number was a new exchange."
 
  Many of the high-tech phone systems at area companies, including 
some
that CM said were vital to its business such as the Boston Phoenix,
The Boston Globe and the Hynes Convention Center, simply didn't
recognize the new 946 exchange as a valid number.
 
"That was ridiculous," moaned Moretti. "Here we are, a public 
relations
firm, and two of the city's biggest newspapers couldn't call us."
 
She and her business partner, Michael Caglianone, gave Nynex an
earful. But the phone company insisted that the number was a "viable
exchange."
 
"Well, bottom line is it hasn't been a viable exchange for our
business," said Moretti, who estimates it would cost more than $5,000
to switch back to an established exchange when the cost of reprinting
stationary, business cards and adress notifications are included. "To
this day, I lie awake at night wondering what calls we've never
gotten. How many businesses are out there with that exchange? Are they
not getting calls, too?"
 
Nynex officials concede there have been some problems with the new 
exchange
but contend most businesses were not adversely affected. They said CM 
and
other companies with the new exchange really didn't miss that many 
calls and
the problems have been corrected.
 
The phone company said that 4,000 of its customers were recently 
issued the
new 946 exchange. Whenever a new exchange is created, residential 
customers
and businesses that use Nynex phone equipment are automatically 
programmed
to recognize the new numbers. But businesses that don't use Nynex
equipment must individually program their machines to accept the new
exchanges. Should human error cause an exchange to be missed, calls to
that exchange will not connect.
 
Oddly enough, technological progress may be the root of the problem.
Because of the explosion of pagers, FAX machines, cellular phones,
modems and online services, Nynex is being flooded with unprecedented
demand for new numbers.  There are 12.1 million phone numbers in use
in Massachusetts, a 2.5 percent increase in the last quarter alone,
said Susan Butta, a Nynex spokeswoman.  That means one to two new
exchanges must be added within the 617 and 508 area code each month to
handle the new numbers.
 
The demand for new numbers has also led Nynex to introduce an added
layer of complexity. Beginning next Saturday, callers making a toll
call within their area code must dial 1, the area code, then the
seven-digit phone number.  Thus, a caller in Boston must dial 617
first when they call Woburn, even though Woburn is still within the
617 area code. Now callers just dial 1 plus the phone number.
 
Confusing? "The irony in all this was that Nynex went out of its way
to give us a number that was easy to remember and easy to dial,"
Moretti said.
 
 
Van Hefner * VANTEK COMMUNICATIONS  *  Eureka, California  *
 
 
[TELECOM Digest Editor's Note: NYNEX cannot really be blamed because
the proprietors of some private phone systems at large companies,
universities, etc are klutzes. People wanted a telephone network where
everyone did thier own thing, so that's what they got now over ten
years ago. I used to work for a large department store downtown on a
part time basis trying to straighten out the mess that predecessors
had made of the Rolm PBX there. It was a mess!  There were lots of
exchanges they could not dial. The fact that the situation described
in this newspaper account is quite common when new exchanges are cut
in is not the fault of telco. If you want to run a PBX or a large
private phone service, then you either know what you are doing or step
out of the way and let someone else do it. Oh, I suppose it is easier
to just ignore complaints and treat the users like ignoramuses and
crackpots.  Sometimes the telcos do not communicate with each other
as they should though ... a case about five years ago involved a new
exchange cut in by a telco in Wisconsin. Illinois Bell did not have
it in their tables for several months afterward, and no amount of
talking could get anyone at IBT to listen. Finally someone at AT&T
twisted their arm, and found someone at IBT who understood what was
wrong. So yes, it can be telco's fault where other telco's are
concerned. I would not be surprised if there are people in other
parts of the USA who are unable to get the 946 prefix discussed simply
because their telco was not up to date. But still, where local
service is concerned, the guys who run the private phone systems are
the ones who need to get their act together.   PAT]
 
------------------------------
 
Date: Wed, 12 Oct 1994 00:41:38 EST
From: Rob Slade <roberts@decus.ca>
Subject: Book Review: "The RS-232 Solution" by Campbell
 
 
BKRS2SOL.RVW  940811
 
Sybex Computer Books
2021 Challenger Drive
Alameda, CA   94501  USA
510-523-8233  800-227-2346
Fax: 510-523-2373
or
Firefly Books
250 Sparks Avenue
Willowdale, Ontario M2H 2S4
416-499-8412  Fax: 416-499-8313
"The RS-232 Solution", Campbell, 1989, 0-89588-488-7, U$24.95/C$32.95
 
Most computer users, even those dealing with communications and
modems, will not have to deal with the intricacies of the RS-232 (or
EIA-232E) interface standard for serial communications.  You buy a
cable, plug in the modem, and that's the end of it.  For those who do
want to know more, this book is fascinating -- as well as being
completely accessible for the non-technical reader.
 
Part one deals with the interface, reasons for an interface standard,
and the general concepts and tools needed to attack an interface
problem.  Part two is primarily a series of "case studies" and
specialized examples.  Interestingly, Campbell nowhere gives a full
listing of the RS-232 pin assignments, concentrating on the "Big
Eight" which do form the foundation of almost all serial 
communications.
The chapter on the Mac is most interesting -- the Mac does not have
an RS-232 port, relying instead on a subset of the EIA-422 standard.
Some notes are odd, however.  The juxtaposition of a marginal note
complaining about the IBM PC asynchronous (serial) port is placed,
without comment, next to a discussion of male and female connector
assignments.  Read carefully, it indicates that IBM was right, but it
may confuse some readers.
 
Those who want the full technical details of the interface
specification will have to get them elsewhere.  Few will want as much
detail on printers as is given here.  For those hobbyists truly
interested in the interface, this is an intriguing, and potentially
quite useful, source.
 
copyright Robert M. Slade, 1994   BKRS2SOL.RVW  940811. Distribution
permitted in TELECOM Digest and associated newsgroups/mailing lists.
 
 
Vancouver      ROBERTS@decus.ca
Institute for  Robert_Slade@sfu.ca
Research into  rslade@cue.bc.ca
User           p1@CyberStore.ca
Security       Canada V7K 2G6
 
------------------------------
 
Date: Tue, 11 Oct 1994 10:49:00 +0100
From: adam ashby <adama@bnr.ca>
Subject: Request: New UK Dialing Codes
 
 
The new UK dialing codes (prefixing all current codes with 1, plus a
couple of entirely new codes) are now in operation and have been since
August 1st.
 
I was wondering if anyone has yet updated the UK area codes and made
them available.  The archives have the old codes, but with reference
to the new codes.  I could easily edit the old file - just wondering
if anyone else had already done it.
 
As a related aside -- all NT DMS switches in the UK were ready for the
new codes before August 1st.
 
And another one - OfTel (the regulatory body) is currently discussing 
a new
(proposed) numbering plan for the UK :-
 
   00 - International (current)
   01 - PSTN (current)
   02 - possible netowrk expansion (new)
   03 - New mobile allocations (new)
   04 - New mobile allocations (new)
   05 - FreePhone numbers (new)
   06 - FreePhone numbers (new)
   07 - Personal numbers (new) - what are those???
   08 - Premium rate (new)
   09 - Premium rate (new)
 
 
Adam Ashby      | 1560442@bnr.ca  | BNR Europe Ltd.
+44 1628 794622 |      FAX        | Maidenhead,
ESN 590 4622    | +44 1628 794381 | England, SL6 4AG
 
------------------------------
 
From: anto@anggrek.inn.bppt.go.id (Anto Daryanto)
Subject: GSM SIM Card: Different?
Date: 11 Oct 1994 20:37:11 -0500
Organization: UTexas Mail-to-News Gateway
 
 
Hi,
 
I just talked to the Motorola GSM handphone provider in Jakarta (PT
Satelindo) about their new service offering, GSM network in Jakarta.
They said that to be able to use their handphone (Motorola 5200 and
7200) you have to use SIM card, OK, it's all right. But then they said
that their SIM card can not be used in other handphone, such as
Phillips, as they informed me.
 
Is this true? As I understand, with only one SIM card you can use any
GSM handphone in any country (of course as long as the countries have
roaming agreement).
 
 
Antonius Daryanto   |  Direktorat TEI
a.daryanto@inn.bppt.go.id |  BPPT Teknologi
        |  Jakarta, INDONESIA
 
------------------------------
 
End of TELECOM Digest V14 #394
****************************
 

