HDTenEightyP/NetNews huggingface dataset:
From: lars@spectrum.CMC.COM (Lars Poulsen)
Newsgroups: comp.dcom.modems
Subject: Re: Tapping modem communications?
Date: 18 Nov 92 06:11:00 GMT
Organization: CMC Network Systems (Rockwell DCD), Santa Barbara, CA, USA

In article <ywR6TB2w165w@chadal.Gwinnett.COM> chuck@chadal.Gwinnett.COM writes:
>>>    Apparently it is no problem to tap a 300-2400baud modem.  I read that
>>> it is possible to tape record the phone line and then play the tones back 
>>> into a modem, is this really possible??

No problem. In fact, many early personal computers used this for mass
storage: An audio cassette deck with a modem was used for program
storage. Cheap, although slow.

This old modem technology used separate frequency bands for the two
signal directions, and each frequency band can be enhanced as needed.

Modern V.32 and V.32bis modems can probably not be tapped without a LOT
of signal processing. These modems use the same frequency band for both
directions. They first study the line characteristics carefully with a
carefully constructed test message. Having learned what kind of echo you
get back (-20 db at 15 msec, -30 db at 20 msec ...) they proceed to
blast the outgoing data down the line; listen to the same pair of wires,
and subtract their own outgoing signal as well as the calculated echo
profile. What remains, must be the signal from the other end.

The problem is that at any point in between, the echo characteristics
are different, and the outgoing signal has already been distorted, so
what you must subtract at the tap point is different from what the
sender subtracts at the injection point.

I am still very impressed at the performance of V.32 bis modems and
shake my head in wonder that they think it can still be doubled for the
next generation.


-- 
/ Lars Poulsen, SMTS Software Engineer	Internet E-mail: lars@CMC.COM
  CMC Network Products / Rockwell Int'l	Telephone: +1-805-968-4262	
  Santa Barbara, CA 93117-3083		TeleFAX:   +1-805-968-8256
From: liechti@elde1.epfl.ch
Newsgroups: comp.dcom.modems
Subject: Re: ZyXEL in Europe
Date: 18 Nov 92 17:52:59 GMT
Organization: Ecole Polytechnique Federale de Lausanne

In article <1992Nov9.141523.4342@news.uit.no>, roy@Mack.UiT.No (Roy Oestensen)
writes:
> (...)
> Does anybody out there know what European countries have approved the ZyXELs?

ZyXEL's modems are approved in Switzerland too.

 +------------------------------------------------------------+
 |  ANDRE LIECHTI, RUE DU LEMAN 11, 1020 RENENS, SWITZERLAND  |\
 |        LCP, MAILBOX 81, 2606 CORGEMONT, SWITZERLAND        | \
 |                                                            | |
 | Internet : liechti@elde.epfl.ch                            | |
 |    Voice : ++41(0)21-636-21-36    Fax : ++41(0)32-97-26-66 | |
 +------------------------------------------------------------\ |
  \____________________________________________________________\|
From: tjh+@CMU.EDU (Tom Holodnik)
Newsgroups: comp.dcom.modems
Subject: Testing long distance connections.
Date: 16 Nov 92 05:57:32 GMT
Article-I.D.: andrew.Uf1wHgW00WCo0Ypndi
Organization: Data Communications, Carnegie Mellon, Pittsburgh, PA


Is there a way I can test a particular modem over a long distance line,
without travelling long distance? 

The things I'd like to test are:
	- whether a particular modem is sensitive to noise unique to long
distance connections.
	- whether a particular modem works better over one long distance
carrier than another. 

The gist of this is that I'd like to know, per long distance carrier,
how to set up a long distance loopback.  Is this possible?  Would I need
to enlist the aid of another party somewhere?

Thanks (much),

Tom Holodnik
Network Development 
Carnegie Mellon University
From: vjs@rhyolite.wpd.sgi.com (Vernon Schryver)
Newsgroups: comp.dcom.modems
Subject: Re: Why is Supra able to sell?
Date: 20 Nov 92 17:35:08 GMT
Organization: Silicon Graphics, Inc.  Mountain View, CA

In article <By0I7I.GCp@gator.rn.com>, larry@gator.rn.com (Larry Snyder) writes:
> ...
> As time and time progresses, the number of HST's out there
> will be declining, so this will change with time.   If you
> want to talk with DOS & Fidonet; HST's are needed -- however
> for UNIX machines, PEP.


The association between PEP and UNIX is changing.

I see more and more UUCP links on one reasonably well connected
machine, sgi.com, that prefer v.32 or v.32bis.


Vernon Schryver,  vjs@sgi.com
From: jvl@redorc.chi.il.us (System Operator)
Newsgroups: comp.dcom.modems
Subject: Re: Why is Supra able to sell?
Date: 19 Nov 92 23:55:11 GMT
Organization: Red Oracle Bbs/Network

In article <12NOV199213230345@elroy.uh.edu>, st1r8@elroy.uh.edu (Guillot, Burt
J.) writes:
>In article <17375@mindlink.bc.ca>, David_Hunter@mindlink.bc.ca (David Hunter)
wr
>ites...
>>positive things about Supras in the computer mags as if they work just super?
>>Compuserve's most recent monthly issue comments on the Supra v.32bis as if
>>there is no question as to its performance....and you will notice Supra has
>>been buying the whole back cover of the mag for months.  You cannot trust the
>>magazine reviews.  The net is a much more direct and honest exchange of views
>>on what works and what doesn't.  My Supra seems to be working now, but it has
>>taken a bunch of fiddling and tweeking and whenever I dial a new system I
>>cross my fingers until I am connected!!
>
>I've had a Supra v.32bis for probably about the same period of time.  I
>have had mixed feelings about it as well.  I still have some problems
>with it that I am unable to resolve, and since I run a BBS off the Supra,
>it makes Supra modems look really bad.
>
>What are the problems?  I have another sysop that tries to call my BBS
>with a Dual Stanard, but he cannot login to the system no matter what.
>The modems try talking but eventually hangup.
>
>Another sysop with a Dual Standard can't get in very easily.  He usually
>has to make more than one call (since the first one gets dropped) and
>when he does get in, it'll be 2400 one day, 9600, 12000, or 14400.  He
>can never come in with the same BPS rate.
>
>I do not consider the Supra modem to be qualified to run as a BBS off of.
>However, when I call other BBSs with my Supra, I usually get through
>fine (EXCEPT the Supra BBS itself).  I called the Supra BBS last week
>and got in at 14400 (I usually had to call in at 2400 before since I
>couldn't go any higher without it kicking me off).  They said they have
>installed T1 lines, and, it looks like that might have fixed their
>problem.
>
>I will probably have to buy another modem for my BBS since the Supra
>is unreliable.  The Dual Stanards cost too much and USR is getting
>much too much money than their worth.  If USR would sell the Dual
>at a resonable price, they might sell a whole lot more!  (They should
>bring their list price for the Dual down to the sysop price, and the
>sysop price half of what it is now).
>
>My next modem will probably be a Zyxel, since I like what I'm seeing from
>them lately.
yes.. i got rid of my supra and got a ZyXel and it is MORE reliable than my
former HST!

I would get that modem, if i were you!

----
jvl@redorc.chi.il.us
amiserv!redorc!jvl
Red Oracle Bulletin Board System/Network @1-815-744-7363
Newsgroups: comp.dcom.modems
From: rl7980@sarah.albany.edu (LUKAS RAYMOND S)
Subject: BOCA and Gateway problem HELP!!!!!!!
Organization: State University of New York at Albany
Distribution: na
Date: Thu, 19 Nov 92 15:47:05 GMT

    I just discoved this news group and juts in time.

    I have a BOCA 14.4K Modem/Fax. It worked fine in my 286-20 but
when I installed it in my Gateway 486dx-33, I had several problems.
First, I set the com port on the modem to COM4 IRQ 3. I need to use com
4 because my mouse is on com1. When I get into QMODEM, I set the port
to COM4 in QMODEM and configured the port (in qmodem) to 0x2e8 and 
IRQ 3. Now, when I switch to COM4 the screen scanged color (a black &
blue) and the modem wouldn't do anything.
    I later switched everything to COM3, 0x3E8, IRQ 4 on the board
and the in Qmodem. This worked except that I don't get any AT commands
echoed but the commands work. I set the card to echo the commands but
still nothing happened. I then used the windows terminal program and the
sent the AT commands. It eventually, sends it after a while and echos the
AT commands and the results. 
    This is the strangest thing I've ever seen.
From: EP.MXG@forsythe.stanford.edu (Maurice Green)
Newsgroups: comp.dcom.modems
Subject: RE: INTEL MODEMS
Date: 21 Nov 1992 10:39:30 -0800
Organization: Stanford University
Distribution: usa
NNTP-Posting-Host: morrow.stanford.edu

Regarding the problems of Intel modems connecting with older 2400
baud modems....I have a new Intel SatisFAXtion/400 and I had no
success connecting to our campus host at 2400, but was fine at 9600
baud (so why would I want 2400?). Intel tech support provided the
answer...the 2400 baud modems were not "smart" modems, so all I had
to do was issue the command string AT\N0\Q0\V0\J1 to shut down all
of the error correction features, etc and the connection worked
perfectly.
From: wolfgang@netcom.com (Wolfgang Henke)
Newsgroups: comp.dcom.modems
Subject: Re: Any Digicom Scout+ bugs?
Date: 21 Nov 92 04:59:47 GMT
Article-I.D.: netcom.1992Nov21.045947.2891
Organization: Netcom
X-Newsreader: Tin 1.1 PL5

Kent Talarico (kent@rahul.net) wrote:
: I have had many problems connecting to the 3 Scout+ modems on this system.

It appears that you have found an incompatibility between a ZyXEL 1496E
and a Digicom Scout+ when calling into it. I recommend that you call
Digicom Tech Support at 1-(800)-833-8900 so that it can be taken care
of. You can also try calling the Digicom BBS at 1-(408)-262-1412 and see
if you get 14,400 bps connects when dialing into the Scouts there.

Now we know who hangs up the modems here at rahul.net :-)


-- 
   _________________________________________________________________________
   Wolfgang Henke     Data lanes not car pool lanes      wolfgang@netcom.com 
Newsgroups: comp.dcom.modems
From: bob@copi.cmhnet.org (Bob Williams)
Subject: BOCA14.4/ISCV3.0/FAS anyone?
Keywords: BOCA,FAS,ISC
Organization: Coordinated Office Programs
Distribution: comp
Date: Wed, 18 Nov 1992 18:53:48 GMT

Hey netters...

I've got a Boca 14.4 internal (Rockwell chipset) modem on a 386DX33 system,
running ISC SysVr3.0.  I installed the FAS drivers today, but got an error [8]
on the boot up message.  I'm using version 2.10 of the FAS drivers.

I'm under the impression that the Rockwell chipset simulates a 16450 chip.  I'm
also under the impression that the FAS drivers will talk to a 16450.  Has anyone
else tried this combination, and if so, what was the outcome?

Please reply via email, I'll summarize for the net.

Bob
-- 
    ____  ____  ____  _   
   //    // // // // //   Bob Williams
  //    // // //_// //    bob@copi.cmhnet.org
 //__  //_// //    //     Coordinated Office Programs, Inc.
Newsgroups: comp.dcom.modems
From: rdippold@qualcom.qualcomm.com (Ron Dippold)
Subject: Re: Motorola Codex 326x should be reference for all others 
Organization: Qualcomm, Inc., San Diego, CA
Date: Wed, 18 Nov 1992 18:55:34 GMT

gtoal@cursci.demon.co.uk (Graham Toal) writes:
>In article <1992Nov17.151714.11062@schbbs.mot.com> bates_r*Corp_C@msm.cdx.mpt.com writes:
>>     I am surprised that I haven't seen a posting here that compares any
>>modem with the Motorola Codex 326x modems. Sure, my company makes them,
>>but I don't work in sales and I do use them myself. Hell, 24Kbps
>>synchronous is hard to beat on a dial line.

>I think the majority of us don't give a damn, because we don't want to fall
>into the proprietary trap that everyone did once before by rushing out to
>get PEP modems.  Now its clearer that v32bis has advantages by virtue of
>being a standard, and we're all waiting for v.fast to be finalised.  No-one
>wants to be first on the block with another expensive toy that'll be a
>heap of junk that doesn't talk to anyone else in 2 years time.

To be fair here, Codex is offering a free upgrade to anyone who buys
the modem.  When V.fast comes out, the modem will be upgraded to do
V.fast.  How long it'll take for that to happen is a question.
-- 
"Someone was running around without his pants.  I think it was Kennedy, the
fat... the senator.  He's idealistic, but maybe a little horny."
  -- Florence Orbach, 78, potential Kennedy rape trial juror (rejected)
From: gerg@netcom.com (Greg Andrews)
Newsgroups: comp.dcom.modems
Subject: Re: Dialin access to Sun 4/110
Date: 17 Nov 92 07:48:05 GMT
Article-I.D.: netcom.1992Nov17.074805.17513
Organization: Netcom Online Communications Services (408-241-9760 login: guest)

joe@oilean.islandsw.com (Joe McGuckin) writes:
>
>DOn't just remove the word 'local' from ttytab, change it to something like
>'remote'
>

Why?  It hasn't hurt the customers I've given that advice to, and Sun's
documents don't seem to be worried about it.  What goes wrong if there
isn't anything after the on/off keyword?


-- 
 .------------------------------------------------------------------.
 |  Greg Andrews   |       UUCP: {amdahl,claris}!netcom!gerg        |
 |                 |   Internet: gerg@netcom.COM                    |
 `------------------------------------------------------------------'
Newsgroups: comp.dcom.modems
From: Albert-Lunde@nwu.edu (Albert Lunde)
Subject: Modems and TDDs
Followup-To: comp.dcom.modems
Originator: lunde@casbah.acns.nwu.edu
Reply-To: Albert-Lunde@nwu.edu (Albert Lunde)
Organization: Northwestern University, Evanston, Illinois, USA
Date: Fri, 20 Nov 1992 18:26:20 GMT

I have a question from one of our clients about communicating between
a TDD (Telecommunications Device for the Deaf?) and a Mac with a
standard modem.

My impression was this would be difficult in both hardware and software
because they use an old (5 bit?, 6 bit?) code rather thann ASCII.
But I can't find a reference handy.

Can someone fill in more details on what is possible?

-- 
    Albert Lunde                      Albert-Lunde@nwu.edu
                                      alunde@nuacvm.bitnet
Newsgroups: comp.dcom.modems
From: hunter@quake.sylmar.ca.us (James Collins)
Subject: Max throughput for optical phone lines.
Organization: Quake Public Access, Sylmar CA
Date: Thu, 19 Nov 1992 22:13:51 GMT

I know that the normal phone lines have a certain max baud rate, where 
above that, the throughput can't go any higher (due to the cables 
themselves).  Now I was just curious what the rate would be for fiber 
optic lines.  Does anyone know?  Thanks.


---------------------------------------------------------------------
James Collins                        | Tips to live by from Rodney King
hunter@quake.sylmar.ca.us            | and Reginald Denny...
james.collins%bbs@quake.sylmar.ca.us | STAY... IN... THE... CAR...
---------------------------------------------------------------------
From: miket@frog.CRDS.COM (Michael C Tiernan)
Newsgroups: comp.dcom.modems
Subject: Re: Compatability problem?  (Hayes V-Series & Intel Satisfaxtiob 400e)
Date: 19 Nov 92 14:09:53 GMT
Organization: Charles River Data Systems

lfinkelstein@vax.clarku.edu writes:
> [...] They have one of the Hayes V-Series modems.
> [...] So, I went and bought an Intel SatisFaxtion 400e v32.bis 14.4.
> [...] but whenever we connect with the client the connection drops to
> 2400 baud immediately.  I called intel, and they blame Hayes,
> saying that the V-Series modems aren't using the v32 standard.  
> [...]

I'd belive Hayes isn't doing it right.  I've not had this same problem
with mine but have you tried using the "%E2" command as explained in the
manual addendum?  This may help you connect right.  The other thing you
might wanna try is to talk to the 14.4 at 9600.  Sounds silly right?
Well, this may (it's worked for me) cause both modems to latch at 9600
and ignore higher possibilities.

Good luck.
-- 
<< MCT >>  Michael C Tiernan. - GEnie:M.Tiernan - AOL:M Tiernan/BCS Mike 
UUCP = alfalfa!pro-angmar!m.tiernan OR miket@frog.UUCP
      It's too bad that it takes almost half of our life
	to realize that it was a "Do-It-Yourself" project.
Newsgroups: comp.dcom.modems
From: lenny@icus.ICUS.COM (Lenny Tropiano)
Subject: Re: PEP over SLIP?
Keywords: SLIP PEP
Organization: ICUS Software Systems, Austin, Texas
Distribution: usa
Date: Tue, 17 Nov 1992 23:28:32 GMT

In article <Bxv6CH.DH6@gator.rn.com> larry@gator.rn.com (Larry Snyder) writes:
>ssmith@eos.arc.nasa.gov (Stephen Smith) writes:
>
>>Is it possible to use SLIP over a PEP connection? 
>
>Yes it is, however throughput is quite slow
>
>Larry Snyder                                    internet: larry@gator.rn.com

Since all PEP (Telebit) modems offer 2400 baud also, I suggest 2400 baud,
without MNP/compression.  You'll get better throughput that way, since
PEP is a HDX (half-duplex protocol) not suitable to SLIP.

-L.
-- 
| Lenny Tropiano           ICUS Software Systems        lenny@icus.ICUS.COM |
|               ...!{cs.utexas.edu,ames,pacbell}!icus!lenny                 |
+-------------- 6905-B Argonne Forest Cove, Austin, TX 78759 ---------------+
From: naddy@mips.ruessel.sub.org (Christian Weisgerber)
Newsgroups: comp.dcom.modems
Organization: My Individual Private Site
Subject: Re: Why is Supra able to sell?
Reply-To: naddy@mips.ruessel.sub.org
X-Software: HERMES GUS 1.04 Rev. Sep  5 1992
Date: Sun, 15 Nov 1992 18:30:10 CET

In <BxKxKG.BLB@news.udel.edu>, Bill Johnston writes:

> the answer is that people use modems in many different ways.  I mainly
> use the Supra to dial into the same terminal server every day.  About
> 25% of the time it fails to connect on the first try and hits on the 
> second.  While connected it performs as expected, so I'm satisfied.

And personal views differ, too. I have no unattended calls or any other
high reliablity applications at this time but I still consider a
"performance" like the one mentioned above totally unacceptable.

-- 
Christian "naddy" Weisgerber, Germany           naddy@mips.ruessel.sub.org
                            Just say +++ATH
Newsgroups: comp.dcom.modems
From: lawrence@combdyn.com (Lawrence Chen)
Subject: Re: T-3000 + Fax Upgrade
Keywords: T-3000 fax WorldBlaer upgrade
Organization: Combustion Dynamics Ltd.
Date: Fri, 20 Nov 1992 18:09:22 GMT

In article <BxxrJK.GDJ@gator.rn.com> larry@gator.rn.com (Larry Snyder) writes:
>bill@unixland.natick.ma.us (Bill Heiser) writes:
>
>>I'vd been thinking about this ... and find it hard to justify a modem
>>as a fax machine.  Many things you want to FAX will be in hard copy from
>
>True -- plus a FAX machine can double as a copy machine --
>
But if you have both....you can use the FAX machine as a poor persons
laser printer.  I used to do this when I had a working SendFAX modem.

Works even better if you have a plain paper fax machine, or where office
procedure is to photocopy all incoming faxes 8-)....or in the case of our
office have both.....

>-- 
>Larry Snyder                                    internet: larry@gator.rn.com
>keeper of the Gator                                  uucp: uunet!gator!larry


-- 
 --EMAIL-----------------------------PHONE-----------FAX------------
 | WORK: lawrence@combdyn.com      | (403)529-2162 | (403)529-2516 |
 | HOME: dreamer@lhaven.uumh.ab.ca | (403)526-6019 | (403)529-5102 |
 -------------------------------------------------------------------
  disclamer = (working_for && !representing) + (Combustion Dynamics Ltd.);
Newsgroups: comp.dcom.modems
From: rcw@teal.csn.org (Robert C. White Jr.)
Subject: Re: Infotel Modem
Organization: Colorado SuperNet, Inc.
Date: Sat, 21 Nov 1992 09:00:55 GMT

In article <Bxq3LG.GAu@world.std.com> rdg@world.std.com (R. Goldstein) writes:
>funnyfin@ccwf.cc.utexas.edu writes:

|Well, I have TWO of these modems, use one in a 386/33 and one in a 486/33
|and use both the v.32bis/v.42bis features as well as the fax features and
|they both work GREAT!  I have never received a NO CARRIER hangup.  It
|sounds like you may not have set the internal switches properly and are
|suffering from a IRQ conflict, or perhaps some real bad line noise.  

Essentially my situation.  I also have had very few problems, except
with the windows fax driver which doesn't appear to work right all the
time.  But I think this is a software problem, and not a hardware problem,
as I can fax with the MS-DOS software reliably.

For the money, this modem is hard to beat.
 
-- 
Robert C. White, Jr.					rcw@whitestar.com
Newsgroups: comp.dcom.modems
From: lawrence@combdyn.com (Lawrence Chen)
Subject: Re: Worldblazer fax upgrade
Organization: Combustion Dynamics Ltd.
Date: Tue, 17 Nov 1992 23:23:12 GMT

In article <1992Nov17.022349.24791@uhura.neoucom.edu> wtm@uhura.neoucom.edu (Bill Mayhew) writes:
>I see Uunet has/will have fax upgrades for T-3000s purchased before
>November 1, 1992 for $69 ($99 list).  Does anyone know the
>constituent parts of the upgrade?  Just ROMs, or is there host
>software too?  Hopefully, this will be extended to Worldblazer
>owners too, though I suppose I am grandfathered in having bought
>T3000s, subsequently upgraded to Worldblazers.  I sure would be
>nice to have fax software available for a workstation system (Sun,
>DEC, HP, etc..), but that is probably daydreaming.  Hopefully,
>there is at least some sort of PC/Mac thing bundled in.
>
I sure hope an upgrade applies to the Worldblazer....I went and bought one,
but I only use it for v.32bis calls going out.  I receive incoming PEP calls,
if I got a switcher for it I could do outgoing PEP calls too....

Anyways, FAX would be a nice plus.

Actually just a few minutes ago I got a call from Holly Illg of Devcom
Mid-America about FAX software for UNIX workstations [(708)574-3600 phone,
(708)572-0508 fax], but indication was that it only worked with Everex or
Multitech FAXmodems.  I asked about Supras, didn't occur to ask about
Worldblazer 8-)

I own the Worldblazer (along with a USR Dual Standard and a T2500SA), my
employer owns two SupraFAXmodems v.32bis.

>
>-- 
>Bill Mayhew      NEOUCOM Computer Services Department
>Rootstown, OH  44272-9995  USA    phone: 216-325-2511
>wtm@uhura.neoucom.edu   (140.220.1.1)


-- 
 --EMAIL-----------------------------PHONE-----------FAX------------
 | WORK: lawrence@combdyn.com      | (403)529-2162 | (403)529-2516 |
 | HOME: dreamer@lhaven.uumh.ab.ca | (403)526-6019 | (403)529-5102 |
 -------------------------------------------------------------------
  disclamer = (working_for && !representing) + (Combustion Dynamics Ltd.);
Newsgroups: comp.dcom.modems
From: hew@postman.hsn.no (Hermann Westlie)
Subject: SatisFAXtion 400 - prob. with getting incomming calls.
Organization: Nordland College
Date: Thu, 19 Nov 1992 13:08:46 GMT

Can anybody help me solve a problem with my SatisFAXtion 400 modem. I have 
problem with receving incomming calls from modems. It works well with 
incomming and outgoing FAXs and outgoing modem calls.

I use a shared line for FAX/modem and Voice calls. The modem picks up the 
phone when I get an incomming call, but it handle incomming modem calls the 
same way as incomming voice calls.

I run Procomm for Windows as my communications program, and uses WinFax pro 
for the Fax.

Hermann Westlie
Bodo Norway.
From: dixon@fourfold.ocunix.on.ca (dixon kenner)
Newsgroups: comp.dcom.modems
Subject: Re: UART 16550 chip compatibles?
Date: Sun, 15 Nov 92 22:11:52 -05
Distribution: world
Organization: FourFold Symmetry, Breckenridge, Quebec

rdippold@qualcom.qualcomm.com (Ron Dippold) writes:

> Sure you don't have a 16550 instead of a 16550A?

What is the difference between the 16550 and 16550A?



--
dixon kenner, dixon@fourfold.ocunix.on.ca
FourFold Symmetry, Breckenridge, Quebec, Canada