HDTenEightyP/NetNews huggingface dataset:
From: erwin@nioz.nl (Erwin Embsen)
Newsgroups: comp.dcom.modems
Subject: Modem hangs up shortly after CD
Date: 19 Aug 92 08:41:47 GMT
Organization: Nederlands Instituut voor Onderzoek der Zee (NIOZ)
Originator: erwin@nioz.nl



Hi,

Yesterday I connected a modem to a Sun SPARCstation 1 just to figure
out how to setup a dial-in/out connection. The modem I use is a
Discovery 1200A type modem and it is connected to ttya.
To provide dial-in support I changed the entry for ttya into the
following:

	tty	"/usr/etc/getty std.1200"	dialup	on remote

To provide dial-out support I created a new device /dev/cua0 as it
is explained in the Sun manual "System & Network Administration".
I also added an entry to /etc/ttytab as follows:

	cua0	"/usr/etc/getty D1200"		unknown	off remote

I am able to use tip to connect to the modem and to send it AT
commands. I am also able to dial out and connect to remote modems.
But when someone tries to dial-in it just hangs up shortly after
detecting the carrier. The CD led on the front panel lights up for
a few seconds and then the modem drops the connection.

What is going wrong or what am I doing wrong and does somebody know
what to do about it?

Erwin.

-- 
Name      : Erwin Embsen                Email: erwin@nioz.nl
Department: BEWON (ERSEM Project)       Phone: +31 (0)2220 - 69424 (or 69300)
Institute : NIOZ, Texel - NL            Fax  : +31 (0)2220 - 19674
Newsgroups: comp.dcom.modems
From: vasa@broncos.b23b.ingr.COM (S. Vasanthan)
Subject: Re: Supra Sources
Reply-To: "S. Vasanthan" <vasa@broncos.b23b.ingr.COM>
Organization: DAZIX an Intergraph Company., Huntsville, AL 35894, USA.
Date: Sun, 16 Aug 1992 03:20:17 GMT

In article <1992Aug14.122955.18344@bnr.ca> jjhayes@nbrwh75.bnr.ca (Jeff Hayes) writes:

  }Given that Supra seems to be (at the moment, anyway) the v.32bis/fax modem 
  }of choice, can anyone recommend a good source for them?

   i just got mine from MacZone (PCZone for the Other side) for $315 US
   each - i bought 4 for me and some freinds - big deal on the bulk
   price - they dropped $5 off :-).  

I ordered mine from BFJ Enterprise (1-800-553-6748) in May 92.  They
called me in July and asked if I still needed the modem.  I said yes,
and they shipped me a 1.200 ROM modem only, no cable, no software for
$289.95. This price included manuals and 2 day UPS shipping. I have
been happy with them modem.

--
S. Vasanthan
 x8559
From: tomc@siesoft.co.uk (Tom Crossland)
Newsgroups: comp.dcom.modems
Subject: Re: Twincom Modems
Date: 13 Aug 92 11:14:20 GMT
Reply-To: tomc@siesoft.co.uk
Organization: Siemens Nixdorf Information Systems Ltd.

bjesiek@telstr.mi.org (Brent Jesiek) writes:
: Does anybody out there know of Twincom modems are any good? They seem to have all the features and protocols all of the other modems have, but it's difficult to tell the quality of the modem by reading an ad or two. Please post your experiences (good or bad) with these modems!

I  have  run  my  BBS using a Tricom Tornado Quin for the last
year  or  so. It is definitely one of the nicest modems I have
used..  full  of  features,  everything  you'd expect and some
additional  extras.  I  have had no probs with mine at all, it
seems  reliable  (1  year  24hours  a  day,  at  least).  I am
planning  on  selling it to upgrade to V32bis, as it only goes
up  to  V32,  but  I'm  holding back a bit to see if I can get
some ROM upgrade for it instead.
--
___ _ __
  ((_))))...
Newsgroups: comp.dcom.modems
From: Steve.Withers@bbs.actrix.gen.nz
Subject: Re: Supra/Computability modem export ban - more info!
Organization: Actrix Information Exchange
Date: Thu, 13 Aug 1992 10:54:11 GMT

In article <BsvKHD.8AE@news.cso.uiuc.edu> berger@atropa (Mike Berger) writes:
> Steve.Withers@bbs.actrix.gen.nz writes:
> >Almost anyone with any sense knows that you can't use a US power supply
> >outside Canada and the US and a handful of other places. Almost the whole
> >world is on 220volts. South America I don't know about at all though.
> *----
> This brings up a question.  I've been told that a lot of electrical
> items in England come without mains plugs because they're different
> in many places.  So how do they use these stupid external wall-plug
> type power supplies?
> --
> 	Mike Berger
> 	Department of Statistics, University of Illinois
> 	AT&TNET     217-244-6067
> 	Internet    berger@atropa.stat.uiuc.edu

You have to get a local version of those "stupid external wall-plug type power
supplies". The 220 volt versions are about twice the size of the 110volt power
supplies. Mine cost NZ$29.30 (about US$18).
 
Steve


-- 
Steve Withers - Wellington, New Zealand | "But the glory kept shining
Steve.Withers@bbs.actrix.gen.nz         |  and bright in my eyes, 
withers_s@kosmos.wcc.govt.nz            |  And the stars going round in 
**** Happy user of OS/2 v2!! ****       |  my head." R. L. S.
Newsgroups: comp.dcom.modems
From: cp77074@csie.nctu.edu.tw (Yeng-Chee Su)
Subject: Re: *Advice* needed on modems
Organization: Computer Science & Information Engin., Chiao-Tung U, Taiwan, ROC
X-Newsreader: Tin 1.1 PL3
Date: Tue, 18 Aug 1992 03:16:16 GMT

denny@cthulhu.Eng.Sun.COM (Denton Gentry) writes:
:   I haven't used it as a FAX modem, so I can't make any pronouncements there. But 
: as a data modem it is great, and I highly recommend it. 

    I'm a 1.00E user too.  I use it as fax transmission for many times, I don't
think it's a good fax modem when using the old rom.  But as I opinion, it's a
very great data modem I used.

A VERY happy supra user.
--
   ______________________________________________________________________
  /             National Chiao Tung University in Taiwan               / \
 |  Name: Yeng-Chee Su              Dept:  Computer Engineering       |__/
 |  Phone: +886-35-716843 (home)    E-mail: cp77074@csie.nctu.edu.tw  |
 |  Address: 5F, 9, 23 Lane, Dong Sun Street, HsinChu, Taiwan 30038   |___ 
  \___________________________________________________________________\__/
Newsgroups: comp.dcom.modems
From: jkh@sparc3.lotus.com (Jordan K Hubbard)
Subject: Re: QBlazer $299
Organization: Lotus Ireland
	<1992Jul28.134845.3865@hubcap.clemson.edu>
Date: Fri, 14 Aug 92 09:51:01 GMT

>future.  I have found the modem to be very studly and well documented.

"Studly?"  (waaaahhh!  Just look at the **** on that modem!)
Lines: 19
Date: Wed, 19 Aug 92 11:21:20 MDT
Newsgroups: comp.dcom.modems
Subject: Re: Best USR v32bis price
Distribution: usa
Organization: Brigham Young University, Provo UT USA
From: parkj@bones.et.byu.edu (john r park)

In article <Bt881w.LIp@gator.rn.com> larry@gator.rn.com (Larry Snyder) writes:
>corson@dice.Eng.Sun.COM (Tom Corson) writes:
>
>>I want to buy a USR v32bis modem with fax.  Can anyone out there point
>>me to a vendor with the lowest price?
>
>so do you shop on price only?
>
>Larry Snyder                                    internet: larry@gator.rn.com

Well he's obviously decided on a brand of modem and a manufacturer
with proven customer support.  I'd guess that indicates that he doesn't
shop on price only or else he'd buy a Supra or some such wouldn't he?

-- 
#include <std_disclaimer.h>

John R Park                |  Dept of Mech. Engineering
parkj@bones.et.byu.edu     |  Brigham Young University
Newsgroups: comp.dcom.modems
From: csjohn@knuth.mtsu.edu (The Mad Hatter)
Subject: Which modem should I buy?
Summary: Which modem should I buy?
Organization: Dept. of CS, Middle TN State Univ, Murfreesboro, TN
Distribution: usa
Date: Mon, 17 Aug 1992 15:11:19 GMT

I am about to buy an external 14.4k fax/modem from one of these 
manufacturers:  BOCA, GVC, TWINCOM, or ZOOM.  All are priced
about the same.  Which would you recommend (or not recommend)?
Thanks very much.  - John
-- 
John Wallace   ||   INTERNET: csjohn@knuth.mtsu.edu
        Graduate Computer Science Student
        Middle Tennessee State University
From: jwaleke@tcedge.mi.org (Jim Waleke)
Newsgroups: comp.dcom.modems
Subject: Re: International V.32/V.32bis links
Distribution: world
X-BBS-Software: EXCELSIOR! v0.95c
Date: 14 Aug 92 11:23:58 EDT
Organization: EXCELSIOR! Tech Support BBS (313) 77-AMIGA

In an article, cybapunk@hovel.welly.gen.nz (Phil Ross) writes:

>

>I've got a "V1.00-E" and I'm anxiously awaiting the upgrade.  Anyway,
>my modem has fallen back to 12000 from 14400, then 10 seconds later went
>back up to 14400.  It's also gone from 9600 to 7200 briefly, when line
>noise was a _major_ problem!

You've gotten better results than I did.  Most of the time when connecting to 
other than Supra Modems, I maintain a constant connect at 14.4k, but when it 
does fall back it is with other Supra's, but unfortunately, it never falls 
forward.  Looks like they created a bug with v1.2-C?  Anyone else 
succesfully fallen forward with anything greater than v1.00 ROM?

Jim
Newsgroups: comp.dcom.modems,comp.sys.ibm.pc.hardware,comp.sys.ibm.pc.misc
From: paul@tct.com (Paul Levin)
Subject: Modems/Fax for sale or trade
Organization: TC Telemanagement, Clearwater, FL
Distribution: usa
Date: Mon, 17 Aug 1992 18:03:40 GMT

I have 1 modem and 1 modem/fax for sale or trade --

	TwinCom 96/42i V.32 MNP5  (up to 38400 baud)
	by Image Communications
	internal half card
	setable to COM1-4 on IRQ3 or 4
	Telix software included

	Sell for $ 200 or trade for V.32 MNP5 external
	(These are selling for $250+ in this month's Computer Shopper)

	--------

	Zoom 24/96 modem/fax  (2400 baud modem, 9600 baud fax)
	external
	Telix modem software and BitCom fax software included

	Sell for $ 50
	(These are selling for $100+ in this month's Computer Shopper)

	--------

			Contact me at --
				paul@count.tct.com   or
				813-969-3367
From: shengj@acf3.nyu.edu (Jia Sheng)
Newsgroups: comp.dcom.modems
Subject: Call waiting - Help!
Keywords: Call waiting
Date: 16 Aug 92 17:05:52 GMT
Organization: New York University

Hi, when I dial up to school through modem, each time somebody calls in,
my line is disconnected abruptly and I have to diap up again. Anybody knows 
if such beast exists:
When somebody calls in, I will know from my computer monitor and may
switch between two lines.

I'm sorry if it's FAQ. If it is, please tell me where I may get FAQ.

Jonathan J. Sheng
Theoretical Chemistry, NYU
(212)998-8439
Newsgroups: comp.dcom.modems
From: aduell@nyx.cs.du.edu (Tony Duell)
Subject: Re: modem schematics
X-Disclaimer: Nyx is a public access Unix system run by the University
	of Denver for the Denver community.  The University has neither
	control over nor responsibility for the opinions of users.
Organization: Nyx, Public Access Unix at U. of Denver Math/CS dept.
Date: Wed, 12 Aug 92 19:06:33 GMT


I really wish that all devices came with schematics, as fixing them
without is a pain. That said, a halfway competant hacker can trace out the
average modem scheamtic in a couple of days. Now for some good sources of
schematics for modems:
1) The AM7910 (Advanced micro devices), or EF7910 (SGS-Thompson?) data
sheet. This was probably the first single-chip modem, does 300/300 and
1200/75 rates, BELL and CCITT. seem to be some application circuits on the
data sheet. Easy to use, if you don't mind a slow modem
2) Sierra Semiconductors do a 2-chip hayes modem. There are 2 versions -
one is for an external (RS232) modems, the other for a PC-slot modem. The
chips and data sheets are available in England from Verospeed. The chip
numbers I have are SC11016 (modem), SC11028 (RS232 controller), SC11037
(PC-bus controller). I guess you cna get them elsewhere
3) Somebody already mentioned Ciarcia's 300 baud modem
4) The Tandy Model 100 technical refernece manual. This laptop included a
300 baud modem built round the motorola 4412 (? - from memory) chip. Full
circuit of the machine is in the techref
5) Electoronics - the Maplin Magazine did a circuit for a 300 baud CCitt
modem in isue 4 (I think). It may be worth a look. I think it used the
Motorla 4412 for transmit, and an separtes PLL for receive.
6) Texas telecom Databook (1987 is the one I have) contains aplication
circuits for a 300/300 and 1200/75 modem
7) This is stretching the definiton of modem a bit, but RTTY boxes are
similar to modems in some respects. There have been circuits for those in
magazines over the years. Again, there were 2 in the Maplin Magazine.

I have no connection with any of the above companies, except for being a
satisfied user of their products.

Now for a pet flame about a Modem Manufacturer and a question
I have a Dowty Quattro 2400 bps modem. I, too wanted the schematic. When I
phoned up Dowty, they said 'People who buy our products are not capable of
repairing them' . I have been doing electronics for 20 years, digital for
15 years. I am capable of repairing all the rest of my computer hardware
(including a DEC PDP11/45 with over 2000 IC's). Why is the modem so
difficult? Why do Dowty insult their customers like that?. Anyway, does
anyon know what the RF5616 IC (There are 2 of them, in positions U32 and
U33 of the PCB) is. They are in 8pin DIP's, seem to have 3 power lines,
some kind of enable input, a clock input and an analogue In and out. I
can't find them in any data books. Does anyone know for sure?
I think they're some kind of filter.

-tony 'PDP11 Hacker' Duell
ard@siva.bris.ac.uk


Newsgroups: comp.dcom.modems
From: dmuntz@dip.eecs.umich.edu (Daniel A Muntz)
Subject: Re: 16550 vs. 16550AFN 
Organization: University of Michigan EECS Dept., Ann Arbor
Date: Wed, 19 Aug 1992 15:48:44 GMT

In article <1992Aug18.221918.1@vax1.umkc.edu> eputnam@vax1.umkc.edu writes:
>
>I was just wondering if any modem manufactures (or anyone) would still be
>putting 16550 chips on their internal modems.  The reason I ask this is that
>I am planning on purchasing an internal 14.4kbs modem and plan to use it with
>both OS/2 2.0 and Windows 3.1.  As I understand, the 16550 is defective and
>the chip to have is the 16550AFN.  Is this correct?  If so, do I need to make
>absolutely sure that I am getting an "AFN" chip, or am I safe with any modem
>which claims to have a 16550?

You should be safe with 16550A, 16550AN, 16550AFN, or PC16550 (replaces the
16550AFN).  There is a rumor that AFN fixed a bug in the A/AN chip, but
the NS engineers I've talked to didn't mention this.

  -Dan
From: berger@atropa (Mike Berger)
Newsgroups: comp.dcom.modems
Subject: Re: Infotel V.32bis Fax/Modem
Date: 12 Aug 92 14:14:46 GMT
Organization: University of Illinois at Urbana

dll@ut-emx.uucp (Don Loflin) writes:
>This is a list of modems I've culled from a PC Week review which I deem
>to be 'good' in that they are fairly low cost and do support fall-forward:
>(this is not a complete list)

>	Supra  $399
>	QuickComm Spirit II  $342
>	Computer Peripherals ViVa 14.4  $449
>	ZyXEL  $469
>	Hayes Optima  $479
>	Boca Research  $495
>	Best Data Smart One  $499
>	Digicom ScoutPlus  $545
>	Intel  $549
>	Practical Peripherals  $549
>	US Robotics Courier  $895
>	MultiTech  $899
*----
This list doesn't distinguish between modems that actually sample
the line periodically and initiate fall-forward (like the Intel
400/e), and those that will only respond to it (like the Supra).
--
	Mike Berger
	Department of Statistics, University of Illinois
	AT&TNET     217-244-6067
	Internet    berger@atropa.stat.uiuc.edu
Newsgroups: comp.dcom.modems
From: Eric Hoffmann <ehfm@midway.uchicago.edu>
Subject: Re: ZyXEL telephone number, please
Organization: CCS
X-Useragent: Nuntius v1.1
Date: Wed, 19 Aug 1992 21:58:09 GMT

In article <PJ4PPB1w165w@ersys.edmonton.ab.ca> Brian Hendrix,
bhendrix@ersys.edmonton.ab.ca writes:
>Would some kind soul please tell me where I can reach the makers of the 
>ZyXEL modems.  And is there anyone out there who knows of a Canadian 
>distributor?

800/255-4101  John Castreje in Sales

714/693-0808
714/693-0705  FAX
714/693-0762  BBS
From: skolodzieski@vaxc.stevens-tech.edu
Newsgroups: comp.dcom.modems
Subject: PP14400 FXSA <--> Zoom 2400 V.42bis
Date: 12 Aug 92 21:17:59 GMT
Organization: Fairleigh Dickinson University

hello,

Can someone help me with the following oddity. I have in my office a 
Practical Peripheral 14400FXSA connected to a DecStation 5000, running
ultrix. On my Atari ST at home I have a Zoom 2400 V.42bis modem. 

I cannot get the Zoom V.42bis to talk with the PP14400 using LAPM(V.42), 
my connection always goes to ALT (MNP 5) for the protocol. Now the Zoom 
V.42bis has connected to other modems using LAPM and it worked great. 
I tried reconfiguring the PP14400 in various ways but it will not not 
negotiate a LAPM connection! 

I called PP support line and all they had to offer was "Wow, It should work!"
And I waited on the phone for 10 minutes long disrtance to hear that!

Any help would be most appreciated. 


Cheers,
Scott Kolodzieski
From: hump@rshark.mixcom.com (Brian Kapitan)
Newsgroups: comp.dcom.modems
Subject: Re: ROM size of Supra v32bis
Date: 19 Aug 92 14:16:31 GMT
Article-I.D.: rshark.0-PCNews-124beta
Organization: Digital Fantasy Music

>> The ROMs in the SUPRA modem are 27256-12 (120ns) and 27256-55 ... This seems
>> a little odd, but they probably just used whatever they had at hand.
>> either way, a couple of 27256-12 or -10 ought to to the trick.
>
>NOT SO.
>According to the Rockwell specs there is a "slow" and a "fast" ROM chip.
>The fast one *has* to be a -55ns one (or faster, but I doubt there are
>any). 55ns EPROMs are somewhat difficult to find and expensive. In any
>case, two -12 or -10 EPROMs will not do.

Sure there are. AMD (among others) makes EPROMS faster than 55ns. Other
choices would be Cypress, Idt.

Plus, i'd love to see the Rockwell data sheet, since my modem's got a pair
of -12's.  and the old roms had a fast (70ns) and a slow (>100ns)...


----
We look before and after, and pine for what is not;     Brian Kapitan
our sincerest laughter with some pain is fraught;       hump@rshark.mixcom.com
our sweetest songs are those that tell of saddest       'Digital Fantasy Music'
thought.              --  shelley
Newsgroups: comp.dcom.modems
From: vladimir@intrepid.com (Vladimir Vukicevic)
Subject: Re: w3<<<<<<help >>>> {zmodems
Organization: Intrepid Technology, Inc.
Date: Thu, 13 Aug 1992 23:37:22 GMT
Keywords: modems

David Kwok writes:
> anybody know howok{ to {Sse zmode {to donwload from bbs
> or any suggest how i can do or using other modem communication software
> how i {_get it (where )???
> because i only know how use the kermit do{wnload from unix system to pc
> can i{ {useing kermit to do the download from bbs
> thanks you very for help
> if any~rone know that please send me a mail

Try to get Telix or Qmodem for PC, or just get the ZModem package for PC.
It includes programs to recieve & send [X|Y|Z]Modem & has good docs. It's
available on many archive sites, like wuarchive.wustl.edu or ibm-archive.umich.
edu.

- Vladimir

BTW, did you scan your message with an OCR? Looks like it.

-- 

-------------------------------------------------------------------------------
	    Internet................vladimir@intrepid.com
^[:r std.disclaimer
From: jim@n5ial.chi.il.us (Jim Graham)
Newsgroups: comp.dcom.modems
Subject: UART CHIPS
Date: 18 Aug 92 23:29:45 GMT
Organization: Me? Organized? Hah! :-)

In article <1992Aug17.143243.281@gandalf.ca> dcarr@gandalf.ca writes:

> In <1992Aug16.090942.9820@usenet.ins.cwru.edu>
> ab245@cleveland.Freenet.Edu (Sam Latonia) writes:
> 
> 
>> Can any user tell me anything about the 8259 uart chip in my 386sx ?
>> I need to know if it is better or not than the 16450, or the 16550,
>> or the 16550A uarts that some of the other computers now use today.
> 
> It would be an interesting experiment to say the least.  Getting the
> interrupt controller to send/receive serial data :-).

d*mn, you beat me to it!  I just saw the original...both it and yours
hit at the same time.

anyways, to the original poster:  the 8259 is *NOT* a UART.  if you
replace it with a UART chip, your computer would, uhh, not work....to
say the least.  (haven't looked in a long, long time, but I don't think
the chips are even close to the same size...lucky you.)

the chip you were referring to is the 8250, and yes, in general, the
8250A/16450 are better than the 8250, and the 16550AN/16550AFN chips
are better than all of the above.  now, you may not need them for your
application, but that's another story!  :-)  I would suggest you look at
the FAQ (since this is one), but we don't have a FAQ on this group....

hope this helps.
   --jim

--
Standard disclaimer....Ever since my cat learned to type, there's no telling
whose thoughts these really are....         73 DE N5IAL (/9)
------------------------------------------------------------------------------
INTERNET:  jim@n5ial.chi.il.us  |  grahj@gagme.chi.il.us  |  j.graham@ieee.org
UUCP:  gagme!n5ial!jim@clout.chi.il.us
AMATEUR RADIO: n5ial@n9hsi (Chicago.IL.US.Earth)
------------------------------------------------------------------------------
Xref: sparky comp.dcom.modems:12272 biz.comp.telebit:836
From: cybapunk@hovel.welly.gen.nz (Phil Ross)
Newsgroups: comp.dcom.modems,biz.comp.telebit
Subject: Re: WB connections with SupraFAX with v.32bis
Date: Wed, 19 Aug 92 16:26:05 +1200
Distribution: World
Organization: The Hovel Bulletin Board System

larry@gator.rn.com (Larry Snyder) writes:

> and one of the sites we connect to has a pair of SupraFAX v.32bis modems
> running SCO 3.2 release 2.0 with the DTE locked at 19200 with hardware flow
> control
> would it be possible to improve on the connection speed with LAPM?  We
> tried it once, but throughput appeared to decrease by about 15%.  I was
> wondering if we change the LAPM window packet from 128 bytes would we
> see any change in throughput?

I get 1450+ cps with v32bis on my Supra.  You should lock your DTE to 57.6k.

--
cybapunk@hovel.welly.gen.nz    X Phil Ross
cybapunk@tornado.welly.gen.nz  X Sysop of The Hovel BBS
cybapunk@sideways.welly.gen.nz X Author of Lords And Ladies, _THE_ BBS door!
Newsgroups: comp.dcom.modems
From: eps@futon.SFSU.EDU (Eric P. Scott)
Subject: Re: TDD vs "std" Hardware (was: Emulating TDD or Caller-Id with an ordinary modem? Possible?)
Reply-To: eps@cs.sfsu.edu
Organization: San Francisco State University
Date: Sun, 16 Aug 1992 08:48:58 GMT

At the recent ComNet show, AT&T was exhibiting a prototype public
telephone they called FuturePhone 2000.  It's sort of a cross
between a conventional payphone and an automated teller machine
(no, it doesn't dispense cash, but it does take credit cards).

It has a color CRT display, a full [7-bit] ASCII keyboard, can
operate as a TDD or VT100-compatible data terminal (but only up
to 2400, sigh), and has a mod jack so you can plug in laptops/
portables (perhaps with higher speed modems or fax modems).

They're planning to install them initially in airports (no
surprise there).

					-=EPS=-