HDTenEightyP/NetNews huggingface dataset:
From: gerrit@laosinh.stgt.sub.org (Gerrit Heitsch)
Newsgroups: comp.dcom.modems
Subject: Re: Only National NS16550's OK/bug-free?
Date: Mon, 28 Sep 1992 13:50:40 MET
Distribution: world
Organization: Lao-Sinh project (private UUCP site)

In article <kurtk.717350790@ee.ualberta.ca>, Kurt Klingbeil writes:

> There are a few 16550 'compatable' chips available.
> Presumably some are clones, others are licensed second-sources?
A friend bought a TL16C550AN (TI) for nearly half the price
he had to pay for the NS chip.

> I have heard that ONLY the National-produced chips work reliably,
> with the possible exception of Goldstar's clone.
The TL16C550ANs FIFO works for him as he should. He and the software
he uses can see no difference between the chip from TI and the one from NS.

Gerrit

-- 
         Gerrit Heitsch  Moenchweg 16  7038 Holzgerlingen  Germany
  Logical adresses: UUCP: gerrit@laosinh.stgt.sub.org FIDO: (2:247/706.9)
                 If you are from outer space, please use:
  universe!local-cluster!milkyway!solarsystem!terra!europe!laosinh!gerrit
Newsgroups: comp.dcom.modems
From: swolfson@nyx.cs.du.edu (Sabina Wolfson)
Subject: 14.4 modem with an XT - possible?
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: Mon, 28 Sep 92 13:06:46 GMT

Hi,

I am trying to find a 14.4 modem (preferably internal) to use with my
XT.  It seems that some internal 14.4 modems have minimum hardware 
requirements (i.e., 286).  

Does anyone know of a internal 14.4 modem that will work ok with an XT?
I would rather get an internal, but if I cannot, does anyone know of any 
external 14.4 modems that will work with an XT (or should they all work)?

Thanks for any hints, advice, or pointers,

 ------ sabina@cns.nyu.edu -------------- swolfson@nyx.cs.du.edu ------
    When the light is green you go.  When the light is red you stop.
              But what do you do, When the light turns blue
           With orange and lavender spots? -- Shel Silverstein
From: somerist@klaava.Helsinki.FI (Jussi T Someristo)
Newsgroups: comp.dcom.modems
Subject: Re: 16450 & 16550
Date: 1 Oct 92 22:07:38 GMT
Organization: University of Helsinki

James.Woo@ebu.ericsson.se writes:
: Can someone tell me the difference between 16450 and 16550?
: Thanks,
: James

	The main difference between these two is that 16550 has a (as far
	as I remember) 64 - byte FIFO - buffer. It means that this UART 
	is capable of buffering incoming data  when using high speed, say
	14.4K V.42bis modem connections.

	These UARTs are pin-compatible, so if you have a 16450
	installed, you can replace it with a 16550 and everything
	should work just fine.

---------------------------
somerist@cc.helsinki.fi

Jussi Someristo
University of Helsinki /
Dept. of computer science
---------------------------



	 
Newsgroups: comp.dcom.modems
From: rick@digibd.com (Rick Richardson)
Subject: ZyXEL adaptive answering bug
Organization: DigiBoard Incorporated, Eden Prairie, MN
Date: Thu, 01 Oct 1992 12:39:30 GMT

This is with ZyXEL ROM version 5.01.

If you have adaptive answering on, and the DTE I/F speed is 38400 or higher,
and a FAX call comes in, the modem switches its I/F speed to 19200 before
telling you that it is a FAX call.  This makes it rather awkward to handle
adaptive answering unless you always use 19200 for the I/F speed.  Example:

AT			(at 38400)
OK			(at 38400)
RING			(at 38400)
ATA			(at 38400)
			(its a data modem calling)
CONNECT 38400/...	(at 38400)
			(so far so good)
NO CARRIER		(at 38400)
RING			(at 38400)
ATA			(at 38400)
			(its a fax machine calling)
+FCON			(at *19200*, e.g. its really garbage!)

-- 
Rick Richardson		Email: rick@digibd.com	This space intentionally
Senior Staff Engineer	Fax:   (612) 943-0803	blank until 1996 elections.
DigiBoard, Inc.		Tel:   (612) 943-5383
Eden Prairie, MN	Radio: N0NMY
From: colonius@dino.dinoco.de (Stephan Muhs)
Newsgroups: comp.dcom.modems
Subject: Re:  ZyXEL's -- do they ever work?
Date: 5 Oct 92 16:29:06 GMT
Organization: Private

In article <BvIM7H.5yH@cs.psu.edu> fenner@postscript.cs.psu.edu (Bill Fenner) writes:
>In article <dirkst.718051437@messua> dirkst@messua.informatik.rwth-aachen.de (Dirk Steinberg) writes:
>
>|has anyone ever seen a real *working* ZyXEL 1496E?
>
>I've got two, in heavy daily use.
>

Actually, I know of several thousand units personally, which work without
a flaw!

>|After half an hour, it just crashed with the LEDs
>|in a random state. Power cycling (the only way to reset) didn't
>|help.
>
>Did you try turning it on with the data/talk switch held in?  That will do
>a hardware reset.
>

Zyxel modems have a typical 2% failure rate (my experience), like most
other modems I know of. That means that 2 out of 100 modems will not
work properly from the start or fail within the first few weeks of
operation. The problem described here is what we refe to as the typical
"warm-up problem." Return your modem to your dealer for repair or
exchange. If you bought from a company which does not offer any service,
just to save a few bucks, it is now the appropriate time to kick yourself.
But you might still return your modem to Zyxel in Taiwan for service.

>|If now it only could dial........
>|It cannot pick up the phone and dial a number, just says NO DIALTONE
>|and the speaker remains silent.
>

This also indicates the warm-up problem. Just because your unit has a
problem does not mean that all Zyxel are bad. Contact your dealer!

>|Not too much
>|quality in there; they use a 12 Mhz CPU clocked at 16 MHz and 150 ns
>|EPROMS whereas somewhere I read 120 ns was required.
>

They clock the CPU at 13 MHz, which is well within the tolerance of the
CPUs they use. CPU failure is almost the LEAST common reason for failure
in a Zyxel modem! If you have a modem with kbit eproms (27C512), 150 ns
is all you will need. If you have a unit with Mbit eproms (27C010),
120 ns are on the safe side. 150 ns eproms will work for most manufacturer`s
eproms.

>Are these rumors, or do you know these things for sure?  I read somewhere
>that everyone in Germany is shorter than 5'5", but I'm not about to post
>to netnews stating that as a fact.
>

I really do *NOT* know what this kind of rubbish has to do here. Most men
in Germany are quite tall, most younger men I know are taller than 6 feet.
But what is the point?


--
stephan muhs      colonius@dino.dinoco.de
wilhelmstr. 51    ...!unido!easix!dino!colonius
5000 koeln 60     Genie: s.muhs
germany           voice: +49 221 7393484
From: dliao@sal-sun25.usc.edu (David Liao)
Newsgroups: comp.dcom.modems
Subject: Caller ID
Date: 1 Oct 1992 15:20:48 -0700
Organization: University of Southern California, Los Angeles, CA
Distribution: usa
NNTP-Posting-Host: sal-sun25.usc.edu

I have a ZyXEL 1496E with caller ID.  I want to experiment the caller id
feature.  Unfortunately, the manual doesn't provide any information on it.
Do I need get caller id service from the telephone company?  or the caller
id works without the service?  




Xref: sparky comp.dcom.modems:14023 comp.sys.sun.admin:6708
From: edhall@rand.org (Ed Hall)
Newsgroups: comp.dcom.modems,comp.sys.sun.admin
Subject: Re: Telebit T3000 and Suns
Keywords: T3000, Sun
Date: 28 Sep 92 01:20:25 GMT
Organization: RAND Corporation.

In article <1992Sep27.170419.1610@kilowatt.uucp> root@kilowatt.UUCP (Kilowatt admin) writes:
>	My friend has a WorldBlazer (used to be a T3000) running at 38400.
>His drops characters like crazy! It's more like big chunks of data that 
>disappear.

Then he doesn't have hardware flow control working correctly.  Trying
to run a high-speed modem any other way is close to insanity (or at
least will push you close to it :-).

> But then again, that's talking to my machine - a 486-33 running
>SVR4 (Consensys) with the DTE speed at 115200!!! I don't have any problems!

It wouldn't matter at all, if he had flow-control working.  The lowliest
of PC's can keep from having data overruns by using flow control and a
buffered UART (such as an 16550A).

>	UUCP works fine for obvious reasons - the handshaking of small packets
>keeps the input buffer pretty small - no overruns.

You shouldn't be getting overruns regardless of how big your packets are.

		-Ed Hall
		edhall@rand.org
From: hm002b@uhura.cc.rochester.edu (hasit mehta)
Newsgroups: comp.dcom.modems
Subject: Re: RS-232 cable
Date: 29 Sep 92 02:51:35 GMT
Distribution: usa
Organization: University of Rochester (Rochester, NY)

You can get a hardware handshaking cable from MacConnection for 15 dollars.
It is a bit expensive but it is a very long cable (about 10 feet) and MacConnection will
ship just about anywhere. Just call 1-800-800-2222 and ask for the Mac To
MNP cable.
Hasit
BTW-I have this cable and it works great!
From: hwstock@snll-arpagw.llnl.gov (stockman harlan w)
Newsgroups: comp.dcom.modems
Subject: Re: using 'rz' with more than one hop
Date: 30 Sep 92 15:09:15 GMT
Organization: Sandia National Laboratories

In article <1abhi4INNjrr@aludra.usc.edu> dliao@aludra.usc.edu (David Liao) writes:
>I'm trying to send some files from my unix account to my pc using 'rz' and 
>'sz' (Unix Zmodem.)  It won't work.  It's not working because there are more
>than one hop in the connection.  What can I do to bypass this?  Another
>protocol?

I'm not sure what you mean by "more than one hop". I connect up to Unix
systems through PBX's and modem pools, and the only problem I have with
sz and rz is when telnet or the PBX tries to interpret bytes as control
chars. These problems are overcome if you use sz -e -E filename ... to
turn the "control chars" into acceptable escape sequences.

Will your PC software allow you to enter sz commands directly?
From: fnox@vax5.cit.cornell.edu (Mark L. Margolis)
Newsgroups: comp.dcom.modems
Subject: Anyone heard of MicroDirect?
Date: 7 Oct 92 00:25:50 EDT
Distribution: comp
Organization: Cornell University

Has anyone ever heard of a company called MicroDirect, and does anyone have
their address and/or phone number (preferable phone number). I believe they
manufacture modems.

-- 

******************************************************
*                                                    *
*   Mark Margolis     FNOX@VAX5.CIT.CORNELL.EDU      *
*                     FNOX@CRNLVAX5.BITNET           *
*                                                    *
*   Cornell University - Ithaca, New York 14853      *
*                                                    *
******************************************************
From: RS@bmbcomp.uucp (Rick Stomphorst)
Newsgroups: comp.dcom.modems
Subject: Call display with Modems
Date: 29 Sep 92 13:43:40 GMT
Distribution: na
Organization: BMB Compuscience Canada Ltd., Milton, Ontario, Canada

[From: cchen@unixg.ubc.ca (Chia-tung Chen)
[Newsgroups: comp.dcom.modems
[Subject: Call Display with Modems
[Message-ID: <1992Sep19.061644.22985@unixg.ubc.ca>
[Date: 19 Sep 92 06:16:44 GMT
[Sender: news@unixg.ubc.ca (Usenet News Maintenance)
[Organization: University of British Columbia, Vancouver, B.C., Canada
[Lines: 11
[Nntp-Posting-Host: unixg.ubc.ca
[
[Dear Netters,
[  Does anyone know how to or know there is program to display the
[incoming phone number with a modem, while you are not at home?
[I don't want to rent such a machine from my local telephone company
[if I can get my modem to do the work. I can leave it on when I am not
[at home, and check who phoned me when I got home. Can a modem do that?
[Thanks for your help.
[
[Please reply to cchen@unixg.ubc.ca
[
[					 chia-tung chen

I too am interested in receiving Call Display with my modem.  I've heard
(never verified) that the phone no. is sent using Bell 212 protocol.  I
would like to leave an old PC with a 1200baud modem attached to the phone
line 24hrs day, 365 days a year.  All the "Displayed" phone numbers would be
logged into a database.  Every-so-often, I could run a report to see what
phone numbers have phoned me and how often.  This should quickly allow me to
find "unfriendly" phone numbers.

If anyhow has any info, please e-mail me as well or post it.
thanks-in-advance.
Rick.

 ____________________________________________________________________________
|  Rick Stomphorst	    |	  (This space intentionally left blank)      |
|  BMB Compuscience CAN LTD |						     |
|  555 Industrial Drive     |						     |
|  Milton, ONTARIO, CAN.    |						     |
|  L9T 5C2		    |						     |
|  USENET: RS@BMBCOMP.UUCP  |						     |
|__1992_____________________|________________________________________________|
Newsgroups: comp.dcom.modems
From: mskuhn@immd4.informatik.uni-erlangen.de (Markus Kuhn)
Subject: Re: Trellis correction
Reply-To: mskuhn@immd4.informatik.uni-erlangen.de
Organization: CSD., University of Erlangen, Germany
Date: Tue, 6 Oct 1992 16:03:43 GMT

Petty@ralvm29.VNET.IBM.COM (Jack Petty) writes:

>Trellis coding was invented by Gottfried Ungerboeck of IBM (Zurich lab).
>It is a method of encoding data for modulation in a way that adds some
>redundancy to the data and in return allows that data to be correctly
>decoded by the receiver with a lower error rate than the same data
>sent uncoded.  I think of it as a special case of forward error
>correction (but note that Toby Nixon of Hayes has said most people do
>not consider it to be a forward error correcting code).

Why is trellis called a modulation and not a forward error correction
method? It still operates at the bit level and not at the
frequency level. E.g. You have one signal bit and the coder transforms
this in 3 line bits and the Viterbi-Algorithm at the remote end makes the
best guess which single signal bit has caused the 3 noisy bits received
on the line. Or is just everything done by a CPU (i.e. software) called 
error correction and everything done by hardware (the Viterbi-Algorithm)
is part of the modulation? :-)

Markus

-- 
Markus Kuhn, Computer Science student -=-=- University of Erlangen, Germany
Internet: mskuhn@immd4.informatik.uni-erlangen.de  |  X.500 entry available
-A distributed system is one in which the failure of a computer you didn't-
-even know existed can render your own computer unusable. (Leslie Lamport)-
From: nbladt@autelca.ascom.ch (Norbert Bladt)
Newsgroups: comp.dcom.modems
Subject: Re: Supra New ROM (ordering info)
Date: 29 Sep 92 14:35:24 GMT
Organization: Ascom Autelca AG, Guemligen, Switzerland

blaby@fraser.sfu.ca (John Edward Blaby) writes:

>Hmm..I notice that the latest upgrade still does not include the
>promised mnp10. Has anyone heard anything about the lately?
Rumour has it that this is impossible with the current chip set used in the
supra modems (Rockwell).

>If I am not mistaken, MNP10 is mentioned on the box the modem came in!
Yes, you are right and some modems were even advertised with this feature
but it was never included (that's what I gathered from this group).

Norbert.
-- 
Norbert Bladt, Ascom Autelca AG, Worbstr. 201, CH-3073 Guemligen, Switzerland
Phone: +41 31 999 65 52			FAX: +41 31 999 65 44
Mail: nbladt@autelca.ascom.ch   UUCP: ..!uunet!mcsun!chsun!hslrswi!aut!nbladt
Newsgroups: comp.dcom.modems
From: k2@bl.physik.tu-muenchen.de (Klaus Steinberger)
Subject: Re: ZyXEL's -- do they ever work?
Keywords: ZyXEL
Organization: Leibniz-Rechenzentrum, Muenchen (Germany)
Date: Fri, 2 Oct 1992 20:34:53 GMT

dirkst@messua.informatik.rwth-aachen.de (Dirk Steinberg) writes:

>Second try: it worked for half an hour again, but then ...
>Now they swapped the modem for a new one (supposedly, at least).
>This was said to be the last one they had, new modems coming in
>4 weeks...
Sounds like you had real bad luck. I know a large number of people
here in Munich with ZyXEL's, adn they never had a hardware failure.

>Everything is fine now: the self test works, and I can configure the
>modem from my computer, store tel. no. and such.
>If now it only could dial........
>It cannot pick up the phone and dial a number, just says NO DIALTONE
>and the speaker remains silent.
I'm sure you used a Phone Cord for a Siemens or Beocom Phone.
This !@#$#%^^&* guys changed the pinout of the western plug.
Be sure to pick up a phone cord for a "export phone".
I've run into the same trouble, as I tried out my ZyXEL after I got it,
and had no cord other than the one for my Siemens Phone.

Sincerely,
Klaus

--
Klaus Steinberger               Beschleunigerlabor der TU und LMU Muenchen
Phone: (+49 89)3209 4287        Hochschulgelaende
FAX:   (+49 89)3209 4280        D-8046 Garching, Germany
Internet: Klaus.Steinberger@Physik.Uni-Muenchen.DE
Xref: sparky comp.dcom.modems:14621 biz.comp.telebit:955
From: larry@gator.rn.com (Larry Snyder)
Newsgroups: comp.dcom.modems,biz.comp.telebit
Subject: Re: USR DS v.32bis 10-15% faster thoughput over the Worldblazer
Date: 6 Oct 92 19:33:07 GMT
Organization: The Gator Conferencing System 219-289-3745

marc@r-node.gts.org (Marc Fournier - Sys Admin) writes:

>In article <BvMHHH.92x@gator.rn.com> larry@gator.rn.com (Larry Snyder) writes:
>>>help even if my feeds are running their DTE slower?  Can I
>>
>>not much help at these speeds -- the high baud rates will
>>come in hand in ASCII transfers or transfers for non-compressed
>>data
>>
>	Will 115200 DTE hurt anything though?

No.

>of the modems that is available for the different vendors?  Like,
>what *is* the max for my Worldblazer?  What does it take to
>get that max?

The Max would depend on the type of connection and the type of
data being transferred.

I would hope the uucp throughput with the WB using uucp-g on v.32bis
connections would be in the 1550 cps range, but it isn't.  I do however
get 1550 cps at times on my v.32bis USR connections using v.32bis and 
uucp-g.  What can I change in my WB to get the uucp-g up there with the
USR?  To date, the only answer I have received was from Greg who assumed
my WB v.32bis connections were actually V.32 connections, which wasn't the
case.

-- 
Larry Snyder                                    internet: larry@gator.rn.com
keeper of the Gator                                  uucp: uunet!gator!larry
From: geoff@zswamp.UUCP (Geoffrey Welsh)
Newsgroups: comp.dcom.modems
Subject: Re: USR sporster can support HST connections?
Date: Mon, 28 Sep 92 11:11:21 EDT
Organization: Izot's Swamp

yenchee@csie.nctu.edu.tw (Yeng-Chee Su) writes:

>    I've heard the USR sportster would be a 16.8K DS for a long time.  I just
> received one these days, and the parameter doesn't work.  The local dealer
> said the ROM date after 06/18/92 has been deleted the command.  Is it true?

   I'm told that the feature you're talking about was an oversight and has 
been corrected.

Geoffrey Welsh, 7 Strath Humber Court, Islington, Ontario, M9A 4C8 Canada
geoff@zswamp.uucp, [xenitec.on.ca|m2xenix.psg.com]!zswamp!geoff (416)258-8467
         Coincidentally, most people who fight for "fairness" would be
         significantly better off under the system they call "fair"...
From: bdicaire@broue.rot.qc.ca (Benoit Dicaire)
Newsgroups: comp.dcom.modems
Subject: Re: Delrina BBS
Date: 3 Oct 92 14:46:58 GMT
Distribution: world
Organization: Groupe de Recherche Operationnelle en Telecommunication (ROT)
X-Newsreader: TIN [version 1.1 PL6]

Jinmo Ahn (ja2f+@andrew.cmu.edu) wrote:
: 
: Does anyone know what the phone number to Delrina's(DosFax/WinFax) BBS is?
: 
: Supposely, I can get the patch named DFX01.ZIP to fix my supra modem problem.
:

Well I'm using winfax pro 2.0 with supra, works fine for me; what kind of problems occurs ? 

 
Newsgroups: comp.dcom.modems
From: magarret@magnus.acs.ohio-state.edu (COMPUTER DUDETTE)
Subject: Zoom modems
Organization: The Ohio State University
Distribution: cmh
Date: Mon, 5 Oct 1992 04:25:00 GMT

Does anyone know the phone number to contact Zoom? My booklet says that I 
should have a hardware handshaking cable, but I do not know where to get one of
these and it was suggested I call the people at Zoom, but I can't find any 
number for them.
I have a Zoom 2400 baud V.42bis with MNP 5 data compression.
Even if no one has the number, can anyone tell me where the heck to get a 
hardware handshaking cable?  I called one company awhile back and told them to 
send me one, but it turns out it's not one at all, it is just like my other 
cable.  I do not want to have ten million cables laying around, all of the 
wrong type!
By the way, I have a Mac Classic II, with 6 mgs of RAM, if it makes any
difference, and the kind of connector in the back that is a DIN-8 (round)
connector.
I live in Columbus, so if someone knows of a place nearby that sells these 
stupid things, let me know.  I know Microcenter doesn't, they told me to call 
this other company called Triangle Cable.
Thanks!
Marti G.
-- 
**********************************************
THIS SPACE TEMPORARILY UNDER CONSTRUCTION!
email:  magarret@magnus.acs.ohio-state.edu
**********************************************
From: roh@CS.ColoState.EDU (Lucas Roh)
Newsgroups: comp.dcom.modems
Subject: ZyXel Voicemail:  How well does it work?
Date: 28 Sep 92 04:32:42 GMT
Organization: Colorado State University

I understand that ZyXel can do voice-mail.  Can anyone who have used its
feature summarize his/her experience?  
- How does it compare with others such as Complete PC Communicator (sp?)?
- Can you program it to handle sophisticated voice processing?
- How can you record the outgoing messages?

Thanks
Newsgroups: comp.dcom.modems
From: AMOUTR01@ysub.ysu.edu
Subject: FAQ
Organization: Youngstown State University
Date: Sun, 27 Sep 1992 03:30:58 GMT

Hello,
I'm new to this group, so if somebody could point me to a FAQ, I'd greatly
appreciate it.
 
Thanks,
Mark Adams
amoutr01@ysub.ysu.edu
Xref: sparky comp.dcom.modems:14032 comp.sys.mac.comm:9469 uiuc.dcom:1
From: impact@crhc.uiuc.edu (Temporary Account for HP visitors)
Newsgroups: comp.dcom.modems,comp.sys.mac.comm,uiuc.dcom
Subject: PROBLEM: Generic MNP5/V.42bis modems connecting to USRobotics HST
Date: 28 Sep 1992 00:02:45 -0500
Organization: Center for Reliable and High-Performance Computing, University of Illinois at Urbana-Champaign
NNTP-Posting-Host: gershwin.crhc.uiuc.edu
Summary: Problems
Keywords: HST V.42bis MNP

Hello,
 
I am having trouble with other MNP5/V.42bis modems (including
Dallas Fax and Global Village Comm) connecting to my USRobotics
14.4K HST with V.42bis. The problem I am having is ONE way.
I can call up these other MNP5/V.42bis modes and connect
to them in the LAPM/V.42bis mode. However, when I try the
other direction, that is, when the other modems tries
calling my HST it ALWAYS connects in the MNP5 mode.
 
V.42bis compression is preferred over MNP5 so I am trying
to get the other modems to connect to my HST in the v.42bis
mode. I have tried issuing on the other modem (the Dallas Fax
and GVC modem) the AT\N5 command which will ONLY try v.42bis
and then will fallback to standard 2400 mode but that does not
work. I have even tried the AT\N4 command which will ONLY
try v.42bis and then hang up otherwise and this does not work
either. For some reason, the other modems either:
 
1) Do not recognize the HST's V.42bis mode when calling the HST
2) First tries MNP5 and then tries V.42bis
 
In the HST manual, it states that the HST tries V.42bis FIRST,
and then tries MNP5, and if both fails goes to standard mode.
Is this correct? This seems to be the logical choice as v.42bis
has superior compression ability over MNP5.
 
The other modems (Dallas Fax and GVC) does not mention which
compression (MNP5 or V.42bis) it tries first. Are you aware of
this problem with other type modems? I have seen this v.42bis problem
in several different brands of modems and has been quite
frustring.... This same problem also happens when these "other"
modems try calling a MultiTech modem. I am starting to think that
there is something wrong with a LOT of these low-cost modems
such Dallas Fax, GVC, Zoom and other generic MNP5/V.42bis modems.
 
Please help out. I have 2.1 Supervisor HST rom.
 
Thanks in advance!