Software Vault: The Diamond Collection/The Diamond Collection (Software Vault)(Digital Impact).ISO/cdr16/tc15_116.zip/TC15-116.TXT

Text File | 1995-03-12 | 30KB | 735 lines

TELECOM Digest     Thu, 23 Feb 95 16:37:00 CST    Volume 15 : Issue 116

Inside This Issue:                           Editor: Patrick A. Townson

    AT&T True Rewards Program - Help Me Out (TELECOM Digest Editor)
    CFP: ACM's Wireless Conference '95 (Change of Date/Location) (Victor
Bahl)
    Source Inc Web Page Correction (Todd Bruning)
    Re: Cellular "Auto-Registration" (Michael D. Sullivan)
    Re: Cellular "Auto-Registration" (Eric A. Carr)
    Re: Cellular "Auto-Registration" (Gerald Serviss)
    Information Wanted About DMS Switches (David Vardy)
    Re: What is DMS-100? (Bill Brasuell)
    Re: What is DMS-100? (John Brandte)

TELECOM Digest is an electronic journal devoted mostly but not
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Additionally, the Digest is funded by gifts from generous readers such
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All opinions expressed herein are deemed to be those of the author. Any
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should not be considered any official expression by the organization.
----------------------------------------------------------------------

Date: Thu, 23 Feb 95 16:02:34 CST
From: [e-mail] (TELECOM Digest Editor)
Subject: AT&T True Rewards Program - Help Me Out


Today in the mail I got my (apparently) quarterly statement from the
AT&T True Rewards program which says I now have aquired 469 points.
For those not familiar with the program, points are awarded to AT&T
residence subscribers who have enrolled in the program at the rate
of one point for every dollar spent on AT&T long distance each month.
Any month  (starting in May) that you spend more than $75 per month
on AT&T long distance calls you get two points for every dollar.

All domestic and international calls carried by AT&T count toward
this program including calls made with an AT&T calling card. Exceptions
are calls which are billed direct rather than through a local telco,
and calls to Alliance 700 Teleconferencing. Those do not earn points.
Neither do long distance calls made from cellular or marine phones, or
calls to 900 Multiquest numbers. Other than that -- basically, all
your regular, routine long distance calls via AT&T from your home
phone which are billed by your local telco count toward True Rewards.

In addition to point-per-dollar rewards, there are other ways to earn
rewards:

       If you move, notify AT&T of your new address and
       phone number; you get 100 bonus points.

       If someone signs up for AT&T residence long distance
       service and gives you as the referral, you get 300 bonus
       points.

Points can be redeemed at any time when you have at least 100. They
can be redeemed for various things:

       $5 credit toward your AT&T bill for every 100 points.
       (You get those 'pay to the order of the telephone company'
       credit slips to redeem with your phone bill.)

       If you prefer, you get $5 cash back for every 100 points
       or you have it credited to your AT&T Universal Visa or
       Mastercard instead.  (They send you a check in your name.)

       You can also have $5 for every 100 points credited to your
       paging/messaging service account with McCaw, Interlink,
       Airsignal, Telepage Northwest or Vegas Communications.

       Five frequent flyer miles on Delta, United, or (god forbid!
       I don't want to die yet!) US Air for each 100 points is
       another option.

       Disney is in on this also, and points can be redeemed for
       service from the Disney Channel or their catalog.


One thing AT&T stressed was that 'point pooling' is allowed, and
encouraged. All you have to do is tell them you want to transfer your
True Rewards points to someone else; they'll be happy to do it.
They said having two or three people sign up for AT&T residential
service (300 points each) along with transfer of points from people
who have collected them but are not interested in redeeming them
could 'result in someone having hundreds, or even thousands of points
in a very short time ...'

The thing which appeals to me is the credit on my local telco bill
and here is how YOU can help:  If you have been meaning to possibly
send a donation to the Digest but have not gotten around to it yet --
or maybe you just don't have the money to spare -- then you can use
this round-about way of helping instead.

If you intend at some point in the near future to sign up for AT&T
residential service, do it through this special phone number:

     Call 1-800-383-6158.  The representative will switch you
     to AT&T for free and enroll you in True Rewards.

     Give the representative REFERRAL NUMBER : BY-6195039315666.
     Tell the representative to apply the 300 bonus points to
     that account. Everytime someone switches to AT&T in this
     way, I get the points.  Got more than one line at your place?
     Feel like giving one of them to AT&T?

If you are not interested in participating in True Rewards but got a
statement recently from AT&T with your point balance shown you can
also help. Mine arrived by bulk mail today so I assume there are lots
of these in the mail now.  Do this:

      Call 1-800-869-9900. Tell the representative your True Rewards
      account number which is printed on the bottom of the statement
      they sent you. Tell the representative to transfer all of your
      points to my telephone number 708-329-0570.

As the points come in from new subscribers to AT&T who use my
referral number and as points come in from transfers out of accounts
where they are not wanted, I'll redeem them for credit on my always
high, frequently delinquent phone bill.  (I haven't gotten cut off
once yet this year, I'll have you know! Not only that, since I got my
last 'deferred payment plan' agreement finished a few months ago I am
eligible to stall by starting another one if absolutely necessary.)

If you do sign up using my referral number or transfer your unwanted
True Rewards points, please send me email and let me know so I have
an idea what's going on.

You have to call the two numbers shown above to do all this; the
regular representatives on the published numbers they use can't handle
it.

Thank you very much!


Patrick Townson
TELECOM Digest Editor

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

From: [e-mail] (Victor Bahl)
Subject: CFP: ACM's Wireless Conference '95 (Change of Date/Location)
Date: 22 Feb 1995 17:34:33 GMT
Organization: Digital Equipment Corporation
Reply-To: [e-mail] (Victor Bahl)


      Announcement and Call for Papers

              FIRST INTERNATIONAL CONFERENCE
     ON
    MOBILE COMPUTING AND NETWORKING 1995

           November 14-15, 1995 (Tutorials on Monday, Nov. 13)
                        Berkeley, California, USA

   Sponsored by the ACM's Special Interest Groups:  SIGCOMM,  SIGMETRICS
               SIGOPS, SIGMOD (pending), SIGACT and CESDIS NASA

   The  wireless communication revolution is bringing fundamental
changes
   to  telecommunication  and computing.  Wide-area cellular  systems
and
   wireless LANs promise to make integrated networks a reality and
provide
   fully  distributed and ubiquitous mobile computing and
communications,
   thus  bringing  an  end  to  the tyranny  of  geography.
Furthermore,
   services for the  mobile user are maturing and are poised to change
the
   nature  and scope of communication.  This conference, the first  of
an
   annual series, will serve as the premier international forum
addressing
   networks,  systems,  algorithms,  and  applications  that  support
the
   symbiosis of portable computers and wireless networks.

   PAPERS

    Technical  papers describing previously unpublished,  original,
   completed,  or  in-progress  research, are solicited on  topics at
the
   link layer and above.  Topics will include, but are not limited to:

 * Applications and computing services supporting the mobile user.
        * Network architectures, protocols or service algorithms  to
cope
   with mobility, limited bandwidth, or intermittent connectivity.
 * Design and analysis of algorithms for online and mobile
   environments.
 * Distributed network protocols.
 * Performance characterization of mobile/wireless networks and
   systems.
 * Network management for mobile and wireless networks.
 * Service integration and interworking of wired and wireless
   networks.
 * Characterization of the influence of lower layers on the design
   and performance of higher layers.
 * Security, scalability and reliability issues for mobile/wireless
   systems
 * Wireless Multimedia Systems
 * Satellite Communication

   All papers will be refereed by the program committee.  Accepted
papers
   will  be  published in conference proceedings.  Papers  of
particular
   merit  will be selected for publication in the  ACM/Baltzer Journal
on
   Wireless Networks.

   HOW TO SUBMIT

 Paper  submission  will be handled electronically. Authors should
   Email a PostScript version of their full paper to:
         "[e-mail]".

   This  Email  address  will become  operational on March 1. The
address
   will be backed by software that can test submissions for print-
ability.
   In order to pass the test, authors should ensure that their papers
meet
   these restrictions:

        - PostScript version 2 or later
        - no longer than 15 pages
        - fits properly on "US Letter" size paper (8.5x11 inches)
        - reference only Computer Modern or  standard  Adobe  fonts
(i.e.,
          Courier, Times Roman, or Helvetica); other fonts may be used
          but must be included in the PostScript file

   In  addition, authors  should  be  sure to select an easy-to-read
font
   size.  The  proceedings  will  be  printed  in  two-column  format,
so
   authors are encouraged to submit  two-column  papers.  To learn how
to
   use  the  submission  software, send a message with the body "HELP"
to
   the above Email address any time on or after March 1.

   TUTORIALS

 Proposals  for  tutorials  are  solicited.  Evaluation of  the
   proposals  will  be based on expertise and experience of
instructors,
   and  the  relevance of the subject matter.  Potential instructors
are
   requested  to submit at most 5 pages, including a biographical
sketch
   to Krishan Sabnani ([e-mail]).

   PANELS

 Panels are solicited that  examine  innovative, controversial, or
   otherwise provocative  issues of interest. Panel proposals  should
not
   exceed  more  than 3 pages, including  biographical  sketches  of
the
   panelist.

   STUDENT PARTICIPATION

 Papers with a student  as a  primary  author will enter a student
   paper award competition. A  cover letter  must identify the paper as
a
   candidate for the student paper competition.

   IMPORTANT DATES
 Submissions due:     April 3, 1995
 Notification of acceptance: June 16, 1995
 Camera-ready version due:   August 14, 1995

   For More Information: Please contact Dan Duchamp
([e-mail])
   or Baruch Awerbuch ([e-mail]), the Program Co-Chairs.

   WWW/GOPHER INFORMATION

 This CFP and other ACM related activities may be found in
      gopher://gopher.acm.org  (for gopher viewers)
      http://info.acm.org/  (for WWW browsers)


  GENERAL CO-CHAIRS:
     Imrich Chlamtac       Dave Morgan
     Dept. of  Electrical & Computer Eng.   VP & Director of Research
     University of Massachusetts     Wireless Division, Motorola
     [e-mail]     [e-mail]
     Tel: [phone]      Tel.: [phone]

  PROGRAM CO-CHAIRS
     Baruch Awerbuch       Dan Duchamp
     Dept. of Computer Science      Dept. of Computer Science
     The John Hopkins University     Columbia University
     Room NEB 318, Baltimore, MD     500 W. 120 St. New York, NY
     [e-mail]      [e-mail]
     Tel.: [phone]      Tel.: [phone]
     Fax.: [phone]      Fax.: [phone]

  LOCAL CHAIR     TUTORIAL CHAIR
     Eric Brewer       Krishan Sabnani, AT & T
     Dept. of Computer Science      Tel.: [phone]
     University of California @ Berkeley    Fax.: [phone]
     [e-mail]      [e-mail]

  VICE CHAIR     STEERING COMMITTEE CHAIR
    Chris Edmondson-Yurkanan      Imrich Chlamtac
    CS, University of Texas, Austin     ECE, University of Massachusetts
    [e-mail]      [e-mail]

  PUBLICITY CHAIR   REGISTERATION CHAIR
    Victor Bahl,       Melody Moh
    Digital Equipment Corp. & UMASS     San Jose State University
    [e-mail]      [e-mail]

  TREASURER
    Anton Dahbura,  Motorola

  PROGRAM COMMITTEE
    Baruch Awerbuch, John Hopkins   B. R. Badrinath, Rutgers U.,
    Alan  Borodin,  U. Toronto    Bob Broderson,  UC Berkeley,
    Ramon Caceres, AT&T Bell Labs.   Steve Deering,  Xerox  PARC,
    Dan Duchamp, Columbia    Domenico Ferrari,  UC Berkeley
    David Johnson,  Carnegie Mellon,   Phil Karn, Qualcomm Inc.
    Randy Katz,  UC Berkeley    Leonard Kleinrock,  UCLA,
    Paul  Leach,  Microsoft    Debasis Mitra,  AT&T,
    Christos Papadimitriou, UC San Diego  Rafi Rom, Technion & SUN,
    Nachum Shacham,  SRI    Jeff  Vitter,  Duke U.,
    John  Zahorjan,  U. Washington

  STEERING COMMITTEE
    Imrich Chlamtac,   [e-mail]   Chair
    Lyman Chapin,      [e-mail]       SIGCOMM Chair
    Raj Jain,        [e-mail]       SIGCOMM Vice Chair
    Chris Edmondson,   [e-mail]      SIGCOMM Sec/Treasurer
    Dave Oran,         [e-mail]       SIGCOMM editor
    Greg Wetzel,       [e-mail]      SIGCOMM Info Services
    Vint Cerf,        *[e-mail]       SIGCOMM Prev. Chair
    Ian Akyildiz,      [e-mail]
    Pat McCarren,      [e-mail]              ACM Headquaters
    Baruch Awerbuch,   [e-mail]      SIGACT rep.
    Linda Wright,      [e-mail]     SIGMETRICS rep.
    Tomasz Imielinski, [e-mail]       SIGMOD rep.

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

From: [e-mail] (Todd Bruning / Kelly Jones)
Subject: Source Inc Web Page Correction
Date: Thu, 23 Feb 1995 16:44:02
Organization: UniComp Technologies International Corp -- Internet
Service


Boy, oh boy. Go to all the trouble to put up a web page and then give
the wrong url address. Hope the boss doesn't find out.

Anyway, the Source, Inc home page address is:

          http://www.sourcetele.com/sourcetele.

Come by and visit. We have all kinds of interesting telephony stuff.


     Source, Inc.,  Telecom Sales and Support - 214.450.2700
     Visit our home page for telecom gear and technical information,
     http://www.sourcetele.com/sourcetele,  E-mail [e-mail]

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

From: [e-mail] (Michael D. Sullivan)
Subject: Re: Cellular "Auto-Registration"
Date: 23 Feb 1995 04:31:17 -0500
Organization: Wilkinson, Barker, Knauer & Quinn (Washington, DC, USA)


[e-mail] (Rick Edwards) writes:

·

> There has been an ongoing discussion on another network regarding
> "auto-registration" in the present analog NAMPS system. It appears
that
> no one on that network can give a definitive answer as to exactly how
it
> works.  So I am leaving a message here hoping (knowing) that someone
> will have the correct answers.

> Some of the questions we have regarding auto-registration on a
cellular
> phone (system) are:

> 1) Does the individual phone transmit it's MIN/ESN pair on powerup
after
> finding an appropriate control channel?

Yes, as part of a defined data stream.  It's encoded, but not encrypted.

> 2) If indeed the phone transmits it's ID upon powerup, why is it
apparently
> ignored by some systems (AirTouch in Los Angeles)?

Autonomous registration is a feature built into the standard, but
there is no requirement that carriers use it.  For several years in
the beginning, it wasn't used.  Perhaps Airtouch in LA doesn't use it
because of the overhead that would be taken up in a system composed of
small cells and lots of phones.

> 3) What would be the typical amount of time between auto-registration
> requests on most cellular systems? (I know this varies on system
usage,
> software, etc. but would like a "ballpark" number).

No idea.  If the unit goes out of range, it re-registers when it comes
back in range.  I don't believe this happens when just moving from
cell to cell.  There would be FAR too much overhead, with little
productive results.

> 4) How exactly does the cellular system request an ID from each phone
> and keep it orderly? (IE..does it go by ESNs? How are collisions
> prevented from multiple phones? etc.)

When multiple phones respond in an interfering manner, they get no
response.  The standard calls for them to wait a quasi-random time and
retry.  Each phone will likely wait a different quasi-random time,
thus avoiding collisions somewhat.

> 5) How do cellular systems treat older phones (without auto-
registration)
> when trying to ring them (phone call to phone)?

A page is sent out over the control channel IDing the addressed phone.
This could be done over an entire system more or less simultaneously,
or it could be done over sub-systems, or it could be done cell-by-cell,
depending on the system engineering and whether the switch has some
idea where to look.


Michael D. Sullivan | INTERNET E-MAIL TO:  [e-mail]
Bethesda, Md., USA  | also [e-mail], [e-mail]

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

From: [e-mail] (Eric A. Carr)
Subject: Re: Cellular "Auto-Registration"
Organization: Motorola MIRS Infrastructure Engineering
Date: Thu, 23 Feb 1995 10:23:28 -0600


In article <[e-mail]>, [e-mail] (Rick
Edwards) wrote:

(questions regarding registration deleted for clarity)

Registration is a process where the mobile radio ("cellular phone")
registers itself with the system with or without user intervention.
The process essentially identifies the mobile and/or gives an
indication as to it's status within the system to the MTSO.

Registration occurs when a call is originated by the mobile (sending
"access information"), or without user intervention at initial powerup
and periodically while the mobile is within the coverage area and
turned on ("periodic registration" -- some people use the term
"autonomous registration").  Whether the registration is periodic or
not, the mobile sends access information.  Amoung other things sent on
the reverse control channel during registration, the mobile sends MIN,
ESN, SCM (Station Class Mark).  On a mobile originated call, dialed
digits are also sent.

Periodic registration is optional; a flag is set in the overhead
message on the forward control channel that informs the mobile whether
or not it needs to perform periodic registration.  Periodic
registration is further specified as to whether radios in their home
service area (REGH field in the overhead message) or roamers (REGR
field in the overhead message) need to perform periodic registration.

In order to avoid periodic registration attempts by all mobile
subscribers at once, a certain procedure is used to determine when the
mobile should perform the process.  Upon powerup, the mobile generates
an initial random number in it's internal registration register which
determines it's initial registration attempt.  After the mobile
performs the initial periodic registration, the registration register
in the mobile is incremented by a constant value in the overhead
message ("REGINC" field), sort of like a clock.  Included in the
overhead message is the field REGID, to which the mobile compares the
value of it's internal registration register.  When the value of the
registration register reaches the value of REGID, periodic
registration occurs.

Typical periodic registration times vary by systems and is determined
by software setting of the REGINC field.  I think it's usually around
20 - 30 minutes.


Eric Carr

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

From: [e-mail] (Gerald Serviss)
Subject: Re: Cellular "Auto-Registration"
Date: 23 Feb 1995 14:41:24 GMT
Organization: Cellular Infrastructure Group, Motorola


In article <[e-mail]>, Rick Edwards <rick.edwards@
cabin.com> wrote:

> There has been an ongoing discussion on another network regarding
> "auto-registration" in the present analog NAMPS system. It appears
that

First registration is no different on AMPS or NAMPS or even IS-54
TDMA.  They all fundamentally use the AMPS control channel signalling
protocol.

> 1) Does the individual phone transmit it's MIN/ESN pair on powerup
after
> finding an appropriate control channel?

It does not have to. The mobile station will only register if it needs
to The need is defined by the data broadcast on the forward control
channel.  The specific data that the mobile looks are are the SID
(system ID) and the REGID (registration ID). A new SID will cause the
mobile to register and if the REGID is far enough away from the last
value recorded in the mobile it will register.

> 2) If indeed the phone transmits it's ID upon powerup, why is it
apparently
> ignored by some systems (AirTouch in Los Angeles)?

I can't answer this without more specific information. What symptoms
are you observing that would lead to this conclusion?

> 3) What would be the typical amount of time between auto-registration
> requests on most cellular systems? (I know this varies on system
usage,
> software, etc. but would like a "ballpark" number).

There can be fixed or area registration, which will cause the mobile
to register only when it moves into a new area.

There is also time base registration which will cause the mobile to
register periodically. I have seen systems use intervals in the range
of 30 minutes to several days.

> 4) How exactly does the cellular system request an ID from each phone
> and keep it orderly? (IE..does it go by ESNs? How are collisions
> prevented from multiple phones? etc.)

Collisions of what ? The ESN is a value assigned by the manufacturer
of the unit. The MINS are controlled by the operator. The methods for
assigning MINS are the same as used by landline operators.

> 5) How do cellular systems treat older phones (without auto-
registration)
> when trying to ring them (phone call to phone)?

All phones even the oldest should support registration. If not then
get a new one. :-). If the phone can not register and the system
"loses" the phone any mobile termination attempt will typically be
directed to an announcement. The alternative would be a broadcast page
to all areas of a system. If you get lost, make a call from the mobile
to any phone and this should reregister you in the system.


Jerry Serviss   Motorola Inc   [e-mail]

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

From: [e-mail] (Vardy David)
Subject: Information Wanted About DMS Switches
Date: 23 Feb 1995 01:18:22 GMT
Organization: Faculty of Engineering, Memorial University of
Newfoundland


Hi! I'm an electrical engineering student preparing for my first
interiview with my first big telecommunications company. I was
wondering if anyone could give me a simple description (or complex if
you have time) of what a DMS Switch is and what it does. What does DMS
stand for?  What kind of maintenance and software is required to
maintain it?

If anyone could answer these or other questions it would be greatly
appreciated ( and it might even get me a job :-) )!


D. Andrew Vardy <[e-mail]>
Faculty of Engineering, Memorial University
St. John's, Newfoundland, Canada


[TELECOM Digest Editor's Note: Actually, you are getting in during the
middle of a thread which began a few days ago about the DMS-100 and
perhaps the final two messages in this issue of the Digest will give
you the information you are seeking.  PAT]

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

From: [e-mail] (Bill Brasuell)
Subject: Re: What is DMS-100?
Organization: Tandem Computers
Date: Wed, 22 Feb 1995 23:24:20 GMT


In article <[e-mail]>, [e-mail] (Greg
Habstritt) wrote:

>> I just got a letter from Pac Bell stating that on 10 March they are
>> going to install DMS-100 at the Los Angeles Central office and that
my
>> prefix would be affected.  The letter also states:

>> What can I expect in the way of problems, if any, using a modem to
>> send or receive call?

> I would guess you won't have any problems at all in the conversion.
It
> sounds like a typical phone company, warning people that their lives
may
> change as a result of work they are doing.

> A DMS-100 is a Northern Telecom "switch" that is installed in the CO.
> It's the actual switch, controlling all network in that particular
> area (as they say, "within that switch").

> Sounds like they have to add another switch because they need more
> capacity that what they have installed presently.  Other than your
> prefix changing (prefixes generally can't be shared across switches
...
> Centrex is an exception), I wouldn't expect much else to change.

> Bottom line is that plain old telephone service (POTS) is POTS.  It
> won't affect your modem dialing, etc.  God only knows why they would
> even send out such a notice, because other than your prefix probably
> changing, you probably won't notice anything different at all.

For ISDN:

DMS-100 switches require SPIDs (Service Profile IDs) for ISDN lines.
#5ESS do not require SPIDS. Also ISDN TAs usually need to know what
type of CO they are "talking to" so a TA reconfiguration may be needed.


Bill Brasuell   Tandem Computers Inc.

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

From: [e-mail] (John Brandte)
Subject: Re: What is DMS-100?
Organization: Racal-Datacom, Sunrise, FL
Date: Thu, 23 Feb 1995 14:25:29 GMT


In article <[e-mail]> [e-mail] (Greg
Habstritt) writes:

>> I just got a letter from Pac Bell stating that on 10 March they are
>> going to install DMS-100 at the Los Angeles Central office and that
my
>> prefix would be affected.  The letter also states:

>> What can I expect in the way of problems, if any, using a modem to
>> send or receive call?

Slightly off the subject but this may be of interest.

We have notived that for BRI ISDN TAs, the DMS-100 switch is a little
different than the 5-ESS. Product that meets NISDN-1 and works on the
5-ESS needs to have a few more changes to work with the DMS-100. I
talked to a customer yesterday that is implementing ISDN that also
noticed that it was harder to shake out service on DMS-100s.

So, I can't say that it would be the same for POTS type service, but
clearly there are some concerns. For critical applications, I would
not ignor the warning. For casual use, you have time to work out
problems as you find them.


John Brandte   Racal-Datacom

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

End of TELECOM Digest V15 #116
******************************