


@FROM   :telecom@delta.eecs.nwu.edu                                   
(Continued from last message)

> Network Security Observations, leading international research 
journal
> on network security, announces the birth of its sister publication
> INTERNET SECURITY MONTHLY.

> A mix of news briefs on incidents, accidents and potholes on the
> datahighway, and a carefully selected set of essentials of immediate
> importance to the network user, fill Internet Security Monthly.
> Professional reporting on and senior network experience in network
> system security warrant so. Focussing on firewalls, unix security,
> cryptography, privacy, legislation, and contributions to the
> international debates on how to protect your connections, the 
security
> of the net, integrity of data/messages, risks, and many more vital
> topics are covered.

> Special sponsorship has made it possible to keep the subscription
> rates low: including airmail delivery an international subscription
> costs US $ 120, in the United States US $ 95.

Gosh what a deal! Another company is going to repackage freely
available information and sell it. Ohhh, I have my checkbook in hand.

> Overwhelming worldwide interest prevents to honor requests for
> trial-orders, samples and review copies.

Oh yeah, I bet. Get the people to fork over money before they realize 
that they got nothing ...


[TELECOM Digest Editor's Note: Well in fairness to them, you should
remember that there are lots of people/organizations out there which
*help research and locate* 'public' information. In other words, yes
the information they propose to distribute is for the most part free
and obtainable *if you know where to look* -- the internet being such
a huge place these days -- but for a lot of newcomers to the net, it
is simply easier to pay someone else to locate specific items of 
interest
and save them the time.   PAT]

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

From: jlundgre@kn.PacBell.COM (John Lundgren)
Subject: Re: Automatic Callback
Date: 20 Dec 1994 01:26:13 GMT
Organization: Pacific Bell Knowledge Network


alain arnaud (ecla@world.std.com) wrote:

> I need to set up an automatic callback system. In more details,
> someone calls the system, let it ring once or twice and hangs up.  
The
> system calls him back and provides a dial tone.

This could be done with any of the more intelligent modems and some
software.  You might be able to do it with a script file in one of
your favorite telecomm programs, such as Procomm plus.  External
modems only require a serial port.  My Zyxel modem detects DTMF
frequencies, and can synth voice, etc.  The modem could be made to
dial out and flash, to transfer a call or forward it.


John Lundgren - Elec Tech - Info Tech Svcs 
Rancho Santiago Community College District 
17th St. at Bristol \ Santa Ana, CA 92706  
jlundgre@pop.rancho.cc.ca.us\jlundgr@eis.calstate.edu

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

From: jlundgre@kn.PacBell.COM (John Lundgren)
Subject: Re: Looking For MNP Protocol Specs
Date: 20 Dec 1994 01:30:51 GMT
Organization: Pacific Bell Knowledge Network


Chris Kalisiak (kalisiak@cs.buffalo.edu) wrote:


>  I am looking for the MNP protocol specs from Microcom. If
> anyone knows where I can find them on the 'net, please let me know.

I've seen mnp specs on the net somewhre, but I can't remember where.
Try one of the comp.dcom.modems or comp.sys.ibm.pc.hardware.modems
newsgroups.  Also, there should be some modem FAQs on the news.answers
newsgroup.


John Lundgren - Elec Tech - Info Tech Svcs 
Rancho Santiago Community College District 
17th St. at Bristol \ Santa Ana, CA 92706  
jlundgre@pop.rancho.cc.ca.us\jlundgr@eis.calstate.edu

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

Date: Tue, 20 Dec 1994 06:33:35 -0500
From: KMP@TIAC.NET (K. M. Peterson)
Subject: NYNEX Voicemail Failure


As I write this, NYNEX seems to be recovering from what I was told was
a LATA-wide failure of their voice mail system ("NYNEX Call 
Answering").

Naturally, I'm rather concerned, as I'm in the interview process for 
new
work for early next year.

Anyone know if this happens more than very infrequently?  One of the
reasons that I was interested in this service was that it was billed 
as
highly reliable.

(BTW, it seems to have affected at least one ISDN customer that I know
of ...)


K. M. Peterson <KMP@TIAC.NET>                  voice:  +1 617 731 6177
Independent Consultant -- Systems and Networks   fax:  +1 617 730 5969

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

Date: Tue, 20 Dec 1994 11:32:15 GMT
From: johnl@iecc.com (John Levine)
Subject: 500 Service Turned on, Sort of


{Network World} reports that AT&T's 500 service tariff went into
service at the end of last week. But before people can actually use
500 numbers, local telcos have to program their switches to know how
to route 500 calls.

At this point, the only place set up is Nevada Bell in the Las Vegas
area.  (Yes, I know that L.V. is non-Bell , but that's what {Network
World} said.)


Regards,

John Levine, johnl@iecc.com
Primary perpetrator of "The Internet for Dummies"


[TELECOM Digest Editor's Note: Here in the 312/708 area, as of Tuesday
morning, December 20, such calls were intercepted immediatly after the
dialing of 1-500 with an intercept message saying call could not be
completed as dialed. It waits for no additional digits after the 1-500
and immediatly cuts in with the intercept.   PAT]

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

From: f.s.menzel <fsm@mtgzfs3.mt.att.com>
Date: Tue, 20 Dec 1994 13:21:11 GMT
Subject: Voicemail Security Notes 


I (blush) naturally prefer AT&T equipment, but am sending this in the
spirit of helping fellow TELECOMers avoid pain.

Since voice mail systems have become commonplace, they have become the
criminal hackers' favorite vehicle for stealing telephone calls
(a.k.a. toll fraud).

Your system should be configured in such as way as to not allow
callers from outside to make calls from your voice mail system to
their destination of choice.  Most voice mail systems provide a
transfer function that allows callers to choose to transfer their call
to a different extension rather than leave a voice mail message.  The
misuse of this function can result in impressive phone bills when
those seeking free phone calls transfer to offshore locations rather
than local extensions.  Current law holds the equipment owner
responsible for all calls emanating from their system, whether
fraudulent or not.

Voice mail and PBX/KEY systems typically have several ways to control
such transfers, including forbidding it altogether.

Please be sure you understand your options and have your system
installed in a manner that precludes toll fraud.  Oh yes, and consider
mailbox security.  I'm sure it's not in your best interest to share
corporate secrets with your competition, so please educate your users
about using meaningful mailbox passwords and be sure that your guest
mailboxes don't invite hackers to take them over and use them as
depositories for information about how to break into your or others'
computer and telephone systems.


Fran Menzel, Security Core Team, 
AT&T Global Business Communications Systems
908-957-5615

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

Date: Tue, 20 Dec 94 12:24:33 EST
From: Alex Cena <acena@wfcsmtp.ie3.lehman.com>
Subject: Help With IS-41 and MAP


Can someone help me with the differences between IS-41 protocol used
by cellular networks in the U.S. and MAP used by GSM?  Are they
compatible so an existing cellular carrier who purchases a PCS license
and builds a DCS1900 offer nationwide roaming between cellular and
PCS?  i.e. I have a cellular license in Chicago and a PCS license in
New York -- can my subscriber in New York roam on my network in 
Chicago.


Regards,

Alex

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

From: jteen0@cris.com (John Erwin)
Subject: Re: Pilgrim Telephone's 1-800-COLLEKT
Date: 20 Dec 1994 07:08:52 GMT
Organization: Concentric Research Corporation


> [TELECOM Digest Editor's Note: I did try it out, and it does indeed
> respond with a duck quacking several times followed by a voice 
saying
> 'welcome to Pilgrim Telecom' or something like that. They ask you to
> enter the number you are calling, then speak your name. You are then
> put on hold and hear nothing for the next several seconds up to a 
> minute while the call is placed (and in my case rejected, as I don't
> pay for collect calls!  grin) ...    PAT]

I found something interesting out about this number:

I used it to call my cellular phone collect, and it worked! This means
you can get free phone calls to your cell phone from Pilgrim because
they're network doesn't recognize that the cell phone's ANI is 
unbillable!


[TELECOM Digest Editor's Quack Comments: Don't be too sure about that!
They'll toss it into the billing system, and yes, on first try it will
fall out. It will land at some telco somewhere in a suspense account
after it falls out of the billing system. One or more adjustment 
clerks
in the legion of back-office employees at telco whose job it is to 
keep
the suspense ledger's balance as low as possible (at least on the 
debit
side, where the final transaction will be a write off as 
uncollectible)
will finally figure it out and reconstruct the paperwork as needed to
push it back into billing *somewhere* -- just off 'his' suspense 
books.
Even though the ANI is useless, someone will note that the call did
go to your (cellular) phone once they find the telco which owns the
particular exchange serving you. The charge will get to you 
eventually,
just be patient.  :)    quack quack!    PAT]

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

Date: Tue, 20 Dec 1994 03:15:06 -0500
Subject: Re: Pilgrim Telephone's 1-800-COLLEKT
From: ndallen@io.org (Nigel Allen)
Organization: Internex Online (io.org)


It appears that Pilgrim Telephone's 1-800-COLLEKT and 1-800-*UCK-ATT
do not work from Canada, or at least from the two Bell Canada
payphones
in Toronto from which I tried to call the numbers.


Nigel Allen, Toronto, Ontario, Canada    ndallen@io.org


[TELECOM Digest Editor's Quack: Well, hey, there is a lot more to
Bell Canada than just a couple payphones outside the store where you
shop.  <g> But you realize what this means, don't you?  It means you
won't be able to help John Erwin in his attempts to defraud Pilgrim
of its collect charges.   Quack quack!  I think I will quit for
today and waddle over to my feeding trough and have lunch.   PAT]

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

End of TELECOM Digest V14 #461
******************************

