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]
Gathered from sources on the Internet. This document discusses various
14.4K (and higher) modems. Many users were able to personally compare
most of the modems side by side. At any rate, it is MUST reading before
you buy a high-speed modem. As most of the "reviewers" lean heavily
toward the Zyxel modems, I've included some detailed specs on these as
well.
Modems discussed: Supra, Gateway Telepath, Zoom,
Practical Peripherials, USR Courier HST Duel, AT&T, Motorola, Zyxel
Thanks to: Paul Platt, Paul Platt, Mark Scrivener, Joseph Stroup,
Aron Roberts, Bill Johnston, and Steve Pershing.
========================================================================
>From pep Tue Nov 3 19:31:13 1992
Date: Tue, 3 Nov 92 19:31:08 CST
From: pep (Paul Platt)
To: Scrivener@llnl.gov@meson
Subject: modems
Cc: pep
Content-Length: 16185
Status: RO
X-Lines: 272
I did a one on one comparison of Gateway, Zoom, Supra, and ZyXEL. Here is
rough cut at data. I called several hard to connect to systems both local
and long distance. Modems were rotated and the calling sequence cycled
through approximately 5 times. As an example of the variance, Gateway
never connected to ZyXEL BBS. Rarely to R&E. Rarely (once? - don't have
my notes with me) to work. ZyXEL connected to Supra, ZyXEL, USR Dual, PPI
reliably. Gateway never got 14400 connect to PPI. Only ZyXEL, and PPI
(seperate test on PPI - not one on one) connected all of the time.
PPI droped carrier or had UUCP problem depending on PROMs used. PPI wasn't
tested under as adverse conditions as the others were.
> Anyone interested in a comparison test against other
> modem brands? I have the ZyXEL, can borrow a Zoom.
> The Supra MAY be able to be borrowed again.
>
RESULTS OF THE FIRST Paul E. Platt MODEM SHOOTOUT
Gateway Telepath - Model tested had the latest PROMs as of September 1992.
This modem is cheap ($199) and comes with the best
software bundle. END OF GOOD NEWS. This was the worst performing
modem BY FAR. It does not like to renegotiate and when it does
renegotiate it sometimes screws up. This modem works well if you
live in an area with perfect phone lines and only call others
with perfect lines. Documentation was the worst of the bunch;
it consisted of a brief command listing and not much else. Call up
Zoom and get their manual. The commands are the same. The command
set for the FAX and modem are pretty comprehensive.This modem
will sometimes lock in a state where it is outputting a tone and
where it refuses to accept ANY commands. The only way to exit this
condition is with a hard reset of the computer. <CTL><ALT><DEL>
doesn't help. Neither does diconnecting the modem from the phone line.
The plug for a regular phone is unswitched. Hence that phone stays
connected during modem usage. This is both good and bad. On the plus
side, I sometimews used it for monitoring call progress up to the
time a tone was received. This was very useful with the Telepath
since it would return a BUSY response when it got a voice message
saying "We're sorry but your call did not go through as dialed.
Please check the number and dial again". At one point I thought
a BBS was very busy only to later find out I was dialing the wrong
number! On the downside, all phones connected to a line degrade the
connection. For that reason, most modems disconnect the regular phone.
In fact, the Gateway Telepath was very sensitive to other phones on
the line. Disconnecting all phones made a big improvement in the
reliability of connections. No other modem showed such extreem
sensitivity to associated equipment. PROMs are soldered in so
upgrades mean returning the modem. Tech support is helpful and
they have an excellent BBS.
However, they do tend to say "It's a problem with the phone line"
to cover up the problem the Gateway has with noisy lines. The
engineer who answers most of the hard questions (a nice and
knowledgeable person) just bought a ZyXEL.
Zoom - Works better than the Telepath by a good bit even though based
on the same Rockwell chipset. Nice lights and a reasonably attractive
case. Relatively cheap. A very rich modem and FAX command set.
The problem is in performance. This modem tries to connect at 14.4K
even when it shouldn't. It then locks in the negotiation phase.
The result is CARRIER 14400 and then nothing. This is similar to the
Gateway but requires more marginal lines for it to happen. Users
with excellent phone lines will probably think this is a great
modem. I don't. I like the manual. The AT, FAX, PROTOCOL and S register
chapters have a command summary at the start and each command
is then listed in more detail. Word on the street is that upgrades
to the firmware are few and far between. Tech support is near
impossible to reach.
Zoom
ati3
V1.200 TR14-Jxxx-001 049
Supra - A very attractive package. This modem is TINY. It reminds me of a
small radar detector. The display is very informative and better than
all but the PPI and the ZyXEL with the LCD. The speaker is the worst
sounding modem speaker I have ever heard. There have been reliability
problems with the speaker but they are supposedly fixed. This modem
worked well. It tends to try for a fast connection. However, it does
a much better job than the Zoom or Gateway of getting through the
negotiation phase. Still, it can be made to exhibit the same
CARRIER 14400 and then nothing response as the other Rockwell
based modems. All in all, not a bad modem for the price ($265 here,
$199 at the BBS Con One convention). This modem runs hot so reliability
is a question. Keep it well ventilated. Case has an expensive look.
Much nicer than the ZyXEL (especially E model) or Zoom. There is a
front panel power switch (YEAH!). As with the other Rockwell based
modems, a very good modem and FAX command set. Several stored factory
setups designed for Mac, Mac with DTR, PC - a nice touch. I couldn't
get the F2 default to be recognized however (user error??). The
F0 and F1 defaults worked. Caller ID is being added and voice is
promised. The Supra BBS looks fairly good. Supra has a reasonable
update policy with fixes being free and new features (caller ID etc.)
being about $30. All in all, this is a reasonable modem if bottom
line dollars are a first priority. The quick reference card is
the best I have seen. The manual is ok for beginners but lacking in
depth of coverage. The modem is available with various software
packages. The PROM revision number was V1.200H. I believe this is the
latest rev. without caller ID. Since these are the original PROMs,
it is interesting that caller ID hasn't been added to the shipping
product.
OK
at i3
V1.200-H TR14-Jxxx-001 053
Practical Peripherals - Based on the AT&T chip set this one is hard to
call since I didn't have it available for direct comparison. However,
I was able to spend some time with it and have a preliminary opinion.
The size and shape make placement a bit awkward. This modem really
wants to sit beside your PC and not on top of it. The display is
GREAT. Only the LCD model ZyXEL is better.Once you have used a
modem with this kind of display you won't want to go back. In some
areas it is better than the ZyXEL. The ZyXEL will just say
DIALING..... The PPI will say DIALING then FAR RING to show that
it is getting a ring at
the other end of the line. There are several other messages not
displayed by the ZyXEL. The modem is easy to update and the past
policies of PPI have been very nice. PROM changes are sent free of
charge. All they ask is that the old PROMs be sent back in the
supplied mailer. The quick reference card is very good. Slightly
below that of the Supra and the ZyXEL. It doesn't show the FAX
commands. The manual is good for beginners but lacks the depth of the
Zoom manual. Connections are, in most cases, easy to make. I was
never able to connect to the ZyXEL BBS however. The PPI likes to
make high speed connections and seems to stay at 14400 more than
the ZyXEL. However, when it does renegotiate, there is a problem
and the connection is more often than not lost. This is fixed in
the latest PROM release (1.15m). However, the fix resulted in the
modem not working on uucp connections. PPI is serious about fixing this
problem and they were asking to work closely with my friend who owns
the PPI. It seems that at first they didn't know what uucp was.
This looks to be an excellent modem once this problem is fixed.
For the moment I would stay away if uucp is a concern. Also, make
sure you have the latest PROMs (1.15m?) since otherwise you will
get lots of dropped connections. I had trouble getting through my
mail before being dropped. The street price for this modem is
about $400. This is expensive for a modem with 9600 FAX (not 14.4K)
and no caller ID or voice mail capability.
Courier HST Dual - I didn't have one to evaluate but almost all BBSs use
these. Some of this is due to their long standing discount program for
sysops but I have heard only good things about these modems.
Unfortunately, you pay a lot for the security. Probably a safe bet
but costly. No voice or caller ID. No security features. The 16.8K
mode is proprietary and is 16.8K in only one direction. The ZyXEL
is 16.8K both ways. However, the HST mode is more widely supported.
In many ways these are the "cheap" reference modems.
AT&T and Motorola - Great reputations. Didn't have any to test. I wanted
to mention them since they are the safe bets for a business.
VERY EXPENSIVE. Generally no side features (FAX, caller ID etc.).
The AT&T is able to download the update to its PROMs by dialing a
special number. THE best way of doing updates I have ever seen. Most
of these can be remotely configured (so can the ZyXEL) which aids
the system administrator. There are now pre-v.fast modems available
that transmit around 24K baud. If you really need high speed point to
point over regular phone lines and you have $1800 to spend ($900
each end) then that is the way to go. Everything else is bush league.
<BACK TO REAL WORLD - HE WAKES UP FROM THE DREAM OF v.FAST>
ZyXEL U-1496 (S & E) - The S model is usually listed without the S designator
i.e. as U-1496. This is the LCD model. It has far and away the best
display I have ever seen. Scope outputs are an option. If you can
afford this modem then get it. I learned more about my phone lines
in 5 minutes with this modem than from 2 visits by the local phone
company technician. If nothing else, at least borrow one for a day.
The feature set is too long to list here. Read the review in
Boardwatch Magazine. The S model is physically very large and at the
opposite end of the size range from the Supra. The E model is smaller
than the S. It is slightly larger than the Zoom
i.e. close to typical but slightly bigger. The E has the more
traditional front panel lights and is similar to the Zoom in capability
of the display. There are some extra display features over the Zoom
with bliking lights telling you line quality etc. but I found that a
little awkward. Both ZyXEL models have caller ID, voice mail, FAX
and on and on. Performance was the best of the group actually tested
(Zoom, PPI, Gateway, Supra). The ZyXEL is conservative. I got a lot
of 12K connections where other modems connected at 14.4K. HOWEVER, under
the line conditions that generated the 12K ZyXEL connections, the ZyXEL
always connected while the others sometimes hung either during
initial negotiation or renegotiation. All in all, this is my favorite
modem and I wound up sending back my Gateway and buying a ZyXEL 1496S.
Speed shifts are fast. Speaker sound quality is good. It has many
rare features - DTMF recognition, distinctive ring recognition,
security callback, leased line dial backup, front pannel
programmability (S model). Negatives include a manual that's out of date
and doesn't document many features (a new one has just been introduced),
lack of support for some common AT command extensions, poor software
documentation, & no Windows software. ZyXEL is excellent about issuing
revised firmware. ZyXEL and Supra seem to have the most active update
programs. ZyXEL's update policy is reasonable but not as good as PPI's.
They sell the updated PROMs for about $20. The code is freely available
for download if you want to save money and burn your own. ZyXEL
dealers are few and far between. This is a shame for such an excellent
product. Their BBS is reasonable and I have gotten fair responses.
With the design staff in Taiwan, I doubt that techie questions will
be as easily answered as on the Gateway BBS. Modem has a 16.8K mode.
This is an extension of v.32bis and is not compatible with HST 16.8K.
ZyXEL is placing the protocol in the public domain (thank you). Also,
there are new + models coming out which extend this mode to 19.2K
(not right now - a future PROM update). There may be some issues with
16.8K since there has been a problem with 16.8K connections not being
clean or properly downshifting on noisy lines. I have not experienced
this myself. Mine has worked fine. The 16.8K problem gets solved when
one of the ZyXELs is restricted to 14.4K or slower. This brings up a
connand set feature missing on many modems. It is possible to set
v.22bis/no negotiation and connect easily to older 2400/1200 baud modems.
Many modems (Gateway, Zoom) require that you lock to a specific speed
i.e. S37=5 for 1200 baud. The ZyXEL method is much more flexible.
Figuring out how to connect to America Online was minutes rather than
the days that I spent with the Gateway and the string was simple:
AT&N15&K0
Be sure to ask about availability of the plus models when ordering.
These modems are not cheap. Call around for good pricing. ZyXEL will
supply names of dealers. Get them to give you the full list and not
just the guy in your area. Then call around. The E model can be had for
$329 from Mike Bernstein at the Kandy Shack (800-638-1170). The E+ is
about $500. Tradeup policy is currently undefined. I hope they will use
PPI as an example. PPI had a tradeup policy (about $250) from their
9600 to 14400 modems. It was supposed to be an upgrade but became a
tradeup when the decision was made to add the LCD display to the PPI.
PROMs are rev. 5.02 m. There is a problem with 16.8K when the modem
retrains (or is it shifts speed?) in the middle of negotiation.
This only happens on the initial connect (as far as we have seen).
You get 16.8K no error correction rather than downshifting. ZyXEL
is aware of this and has a fix in beta test. Same with the problem
connecting to Microsoft BBS. [these last problems have been fixed
with the latest ROMs.]
In summary, for the price and if you have fairly good phone lines, get the
Supra. If you want the best of the ones I tested then that is the ZyXEL. If
you want it all as far as fearures go get the ZyXEL. If you want a modem that
is also a piece of phone line test equipment then get the ZyXEL 1496S.
I bought the S model I tested. I am now sending it back but only because
I want the S+ model.
UPDATE: Tech response from ZyXEL has been very good. Better than I expected.
They say PROMs are free when they are only a bug fix. Upgrade path from
S to S+ is to sell the S ( or in my case get a refund ) and buy the S+.
I think they should do better here. UDS will upgrade to full v.fast for free
but ythe modem costs $900 street price. I am still in love with the ZyXEL.
The display on the S is just to good to give up. It has proven more useful
than I would have imagined. By watching the instantaneous data rate (RX & TX)
numbers you can tell a lot about what is going on. S/N says a lot about how
variable line quality is. Last night kept bouncing from 26dB to 12bD. 12 is awful
and resulted in a speed shift to 4800. 26 will support 14400 - I live in the
boonies!
The Rockwell based modems have problems in negotiation. All three above
showed the same problem signature (CARRIER 14400 then nothing). The ZyXEL
and PPI do not. The fact that I am returing my S for an S plus and shipping
the Gateway back says it all. BTW, Supra is $265 locally so I must REALLY
like the ZyXEL to spend so much more on it.
Gateway --- -10 garbage
Zoom --- -7 poor
PPI --- -7 poor IF you need UUCP. Not -10 since I have faith PPI
will fix it. Friend is taking his SPARCstation
over to PPI to show them the problem. They called
him.
Supra --- +4 adequate. Great feature set. Lots of upgrades.
PPI --- +7 if no UUCP usage. Great display. PROM changes fixes
dropped connection probelm (but breaks UUCP)
Who uses 14400 FAX anyway. I don't get caller ID.
ZyXEL --- +9 Not perfect but close enough for sport. Best feature set.
Works well on poor lines.
MOST WANTED FEATURE: Upgrade of PROMs via modem like AT&T. Expect to
go through several upgrades no matter what you choose.
Hope this long winded report helps. Let me know if you get this.
===============================================================
Zyxel
ati
U1496E V 5.02 M
Zoom
ati3
V1.200 TR14-Jxxx-001 049
===============================================================
>From pep Mon Nov 2 09:05:14 1992
Date: Mon, 2 Nov 92 09:05:13 CST
From: pep (Paul Platt)
To: derek@morris.b17d.ingr.com@meson
Subject: Re: modems not Rockwell
Cc: pep
Content-Length: 3766
Status: RO
X-Lines: 84
>From what I hear USR modems work well. They tend to be overpriced.
Other modems I hear great things about are AT&T and Motorola (UDS).
My comparison was based on what I could get my hands on. I had the Gateway
which wasn't working out. I kept getting told it was my phone lines. The
phone company came out twice and said things were ok. We had a Zoom at
work but it was having problems similar to the Gateway's. I couldn't
even get the Gateway to talk to the Zoom on a local call! A guy who
works for me got a Supra and was able to get in. The people we used the Zoom
to link to got so fed up they bought a ZyXEL 1496E. That is when I decided
that I needed to do some comparison testing. I read the Mac User article
(Nov. issue) but didn't think their testing pushed the top modems enough.
I got the S model ZyXEL on a 30 day money back guarantee on the BBS screen
special. Would have loved to have had a USR Dual to test. A Sportster would
also have been nice.
More thoughts:
Gateway Telepath is hopeless. AVOID
Zoom is poor in its present form and they seem to be waiting on Rockwell
to solve their problems.
Supra is the best of the Rockwell modems but still has problems. Packaging is
excellent - small, attractive, functional. Very good display.
Avoid the Rockwell based modems. I know, preaching to the converted.
PPI is getting there. GREAT display especially for the price. Limited
feature set, however.
USR - expensive, people seem to love them, the thousands of BBSs can't
be wrong. Limited feature set.
AT&T, UDS - expensive. What your business should buy. AT&T gets PROM
updates via modem download directly to the EEPROM. GREAT IDEA! UDS has
a 24.4K speed in a $900 (street price) modem and the mode WORKS! UDS on
that modem offers a FREE upgrade to v.fast when the definition is completed.
Like I said, what I would recommend to a company. Few side features. These are
modems period.
ZyXEL - best feature set. Voice lacks good software but second party software
is currently being worked on. Works well. There is a problem with Microsoft
support BBS. Earlier PROM releases were ok. ZyXEL is being open that they
also see a problem with that one connection. They seem very dedicated to
solving the problem. S model has the best display I have ever seen.
Callback secureity, leased line (S model), scope outputs (S model option),
FAX, caller ID, distinctive ring, DTMF decoding (many possibilities here -
`if you want blah press 3...', voice recording and transmit, 16.8K speed,
future 19.2K speed (+ models only). See Nov Boardwatch Magazine. FAST
speed shifts especially ZyXEL to ZyXEL. This is seperate from a retrain and
works very well. The S model display is like a piece of test gear and
has let me debug my line problems. I feel much better knowing what
the conditions are at any time
S display:
connect speed
error correction and compression mode
DTE speed
instantaneous bit rate both receive & transmit
selection to hang up using front panel (in case software locks)
<next screen>
phase jitter
frequency offset
received signal strength
signal to noise ratio on line (wow does mine move around a lot)
<next screen>
retrains granted (retrain requests from other modem)
retrains done
echo delay
CL (can't remember what this one does. I think it involves leased
line operation and counts disconnects on the line)
<other screens>
other screens allow complete control from the front panel including security
features, S registers, dialing, .......
Sorry about the long winded reply but ZyXEL is a young, small company that
is trying hard and isn't very well known. A year ago their modems were
interesting but with real problems. Most of those are gone and it is a
very useful product. They have come a long way.
=========================================================================
All new S models (some old ones may be at dealers) are now S+ models.
They have a sticker saying "Plus Enhanced". The upgrade is to faster
components including a change from a 12MHz 68000 to a 16MHz 68000.
A PROM upgrade should offer a 19.2K modem around Jan timeframe.
Non-plus models will not be able to run at 19.2K. Not that I think they
have kept the E as a cheaper model seperate from the E+. Careful on the
B models since older ones have smaller PROMs that can't store latest codes.
The update is a $50 board mod. Latest B+ models have sockets with
the extra address line connected.
ZyXEL has a problem that can cause flakiness at 16.8K but a fix is in beta test.
It will be a PROM update.
Voice support is poor but SoftKlone (make the Mirror communications package)
is working on an integrated voice/fax/data com package. They are testing
it with a ZyXEL.
Speaker volume, particularly on voice, needs to be louder. ZyXEL is aware of this.
Personally, I have no problem with the speaker volume under normal
usage (some people want more) but I haven't used voice very much.
========================================================================
Article: 25138 of comp.dcom.modems
Path: netcom.com!netcomsv!decwrl!sun-barr!cs.utexas.edu!zaphod.mps.ohio-state.edu!saimiri.primate.wisc.edu!sdd.hp.com!elroy.jpl.nasa.gov!lll-win--Moreken!angmar!scriv
From: scriv@angmar.llnl.gov (Mark Scrivener)
Newsgroups: comp.dcom.modems
Subject: RE: Straw Poll of Supra and ZyXEL
Keywords: Straw Poll, Supra, ZyXEL
Message-ID: <140718@lll-winken.LLNL.GOV>
Date: 5 Nov 92 19:30:18 GMT
Sender: usenet@lll-winken.LLNL.GOV
Organization: UC LLNL
Lines: 349
Nntp-Posting-Host: angmar.llnl.gov
Status: RO
Well the results are in! I'd like to thank everyone who took time to
respond. In my initial post, I asked people to rate the Supra and the
ZyXEL modems on a scale of -10 (worst) to +10 (best). Here are the results:
Total responses: 40
Total Supra: 27
Total ZyXEL: 13 (Note: some people scored both modems,
for purposes of the total I counted
this as 2 responses.)
Supra average: +5.8
Supra SDev 4.1
ZyXEL average: +8.2
ZyXEL SDev 1.2
A histogram of responses follows:
Score Supra (#) ZyXEL (#)
----- -------- --------
-10 0 0
-9 0 0
-8 0 0
-7 0 0
-6 1 0
-5 0 0
-4 1 0
-3 0 0
-2 1 0
-1 0 0
0 0 0
1 1 0
2 0 0
3 0 0
4 1 0
5 3 1
6 3 0
7 5 1
8 5 4
9 3 7
10 3 0
Those persons who scored both modems ALWAYS scored the Supra LOWER than
the ZyXEL (the lowest ZyXEL score was a +5, and this person gave the
Supra a +1).
It seems that the Supra is a good modem for the money, but it has some
flaws (gets hot, latches up, sometimes has problems with connections,etc).
If you have good phone lines, don't plan on unattended operation, need
special protocalls, and are willing to tollerate the ocasional glitch,
then the Supra might be a good deal for you.
The ZyXEL, however, appears almost bullet proof. If you want the next
best thing to perfection and don't want to pay out the nose for it,
buy a ZyXEL (or so say our survey respondants). Other benifits of the
ZyXEL included better customer support, instant free ROM upgrades via
down-loadable ROM images (provided you can burn your own ROMs), and a
68000 with 2 DSP chips (providing a much more flexable engine than the
Rockwell ASICs in the Supra).
I've included a response I got that gave a nice comparision of several
modems, including the Supra and the ZyXEL. The respondant (sorry, don't
know his name) tested each modem and then ranked it on the -10 to +10
scale. His results agree with the survey.
-Mark
========================================================================
::::::::::::::
zyxel_review_nonpep.txt
::::::::::::::
From: josephs@msen.com (Joseph Stroup)
Newsgroups: comp.dcom.modems
Subject: ZyXEL Report
Date: 1 Jan 1993 12:06:28 -0500
Organization: Msen, Inc. -- Ann Arbor, Michigan
Distribution: world
NNTP-Posting-Host: garnet.msen.com
I just finished testing the Zyxel U-1496E v.32b/fax/voice modem.
I don't care if every feature works but, I needed a fast and good
v32b connection. The modem works. I called the company, bought it
direct , paid cash and got it next day. I have seen no problems
on all major long distance carriers, local carriers, BT, OTC and
one line I call in Japan. I have inbound 0800 free-phone access
to my commercial system from 6 countries and no problems. I tried
to vary the voltages to the modem - no problem. I cut power, caused
surges and even droped the thing - No problem. I own USR and Telebit.
How fast is fast. The price is right and they answer their phone. I asked
for a replacement guarantee not a 15 day repair time and they agreed.
With USR I must send in red lable UPS to get fast service - generally
2 days. One of my friends just drove to the company they treated him
great.
Now on my list of junk...
Supra - Zoom - Quicktel and other junk. Things like Infotel/Midwest Micro
don't even count.
The bottom line the modems work for now, 24hrs 7 days a week. If I do have
problems I will post.
Final Note: Egghead Software admits that Zoom modem fails. They just placed
an order with ZyXEL.
--
Joseph Stroup
========================================================================
::::::::::::::
zyxel_dealers.txt
::::::::::::::
From: aron@garnet.berkeley.edu (Aron Roberts)
Newsgroups: comp.dcom.modems
Subject: Places to purchase ZyXEL modems
Date: 8 Dec 1992 20:59:15 GMT
Organization: University of California, Berkeley
Distribution: na
NNTP-Posting-Host: garnet.berkeley.edu
With the numerous mentions here in the comp.dcom.modems newsgroup
of ZyXEL's line of modems, I thought that sharing the following
information might prove helpful to someone, particularly since
it appears that the computer products dealers that many of us are
most familiar with do not currently carry ZyXEL's products.
David L. Gibbs (gibbsdl@ornl.gov) generously sent me a list of
some dealers that carry the ZyXEL modems. In compiling this list,
he received contributions from ??? (wbe@bbn.com), Larry Sher
(sher@bbn.com), and Paul Levin (paul@count.tct.com), as well as
Joy at ZyXEL USA, (800) 255-4101, or (714) 693-0808:
CTS (615) 966-3667
Golden Everstar (714) 594-4168
Boston Computer (617) 551 0166
The Questor Project, Vancouver, BC (604) 682-6659
Steve Pershing, sp@questor.org
Eagle Computing, Newark, DE (302) 657-9303
Chris Pyrros, pyrros@cis.udel.edu
SI Services, Philadelphia, PA (?), (215) 675 7507
The Whitman Group, (301) 897-8064, (301) 424-7844
Joshua Adler
(There was a mention of another dealer in California, Kandy Shack,
that carries this modem line; I have not yet tried to obtain contact
info for that dealer.)
Dave Gibbs also mentioned that the lowest price he found on the
Zyxel 1496E (?--he didn't mention the specific model) was $349 plus
shipping, although an unnamed BBS sysop local to him was offering
him a $348 price. Steve Pershing at The Questor Project is selling
this model for $350 plus $12 shipping per modem.
Barton F. Bruce (Barton.Bruce@camb.com) will sell these modems
in quantity, usually but not necessarily as a result of a consulting
relationship between his consulting/integration firm and a customer.
His firm offers binary PROM images and other information (such
as specs and Q&A sheets) about ZyXEL modems via anonymous ftp
from cca.camb.com ("or probably just camb.com"), in the zyxel
directory there.
--
Aron Roberts Workstation Software Support Group . 221 Evans Hall
University of California, Berkeley, CA 94720
aron@garnet.berkeley.edu . ucbvax!garnet!aron
aron@ucbgarne.bitnet . (510) 642-5974 . fax: (510) 643-5385
ok--pep[104]
========================================================================
::::::::::::::
zyxel_details.txt
::::::::::::::
The U-1496 Series Universal Modem
U-1496+ External stand-alone model with 20x2 LCD display and menu
control. Includes 4 W leased line support and 16800 data,
upgradable to ZyXEL 19.2 Kbps, 14400 Fax with Voice.
U-1496 External stand-alone model with 20X2 LCD display and menu
control. Includes 4 W leased line support and 16800 data,
14400 Fax with Voice.
U-1496E+ External stand-alone model with LED status display. Includes
2-wire leased and dial-up line application, with 16800
data upgradable to ZyXEL 19.2 Kbps, 14400 Fax with Voice.
U-1496E External stand-alone model with LED status display. Supports
2-wire leased and dial-up line application, with 16800 data
14400 Fax with Voice.
U-1496B/144 PC internal card version. Supports 2-wire leased and dial-up
line application, with 14400 data, 14400 Fax.
U-1496B/168 PC internal card version. Includes 2-wire leased and dial-up
line application, with 16800 data, 14400 Fax and Voice.
U-1496R Rackmount version modem card, supports 2 W leased and dial-up
line, 16800 data upgradable to ZyXEL 19200, 14400 Fax with
Voice. Can be controlled by local NMS.
U-1496RN Rackmount version modem card, supports 4/2 W leased and dial-up
line, 16800 data upgradable to ZyXEL 19200, 14400 Fax with
Voice. Can be controlled by local and remote NMS.
RS-1600 Rack System Chassis with 16 modem slots and 40 X 4 LCD display
and Menu Tree, single power supply.
RS-1600N Rack System Chassis with 16 modem slots and 40 X 4 LCD display
and Menu Tree, with redundant power supply (1993/1q) and NMS
control card, NMS software (1993/1q).
Compatibility
The ZyXEL U-1496 series modem is a high performance universal modem capable
of transmission speed of up to 19.2/16.8 Kbps on a 2-wire full duplex mode.
Universal compatibility covers a broad range of CCITT and BELL standards,
and provides data compression and error free transmission.
Various operation modes that can be achieved are listed in the following
table:
Bit rate Baud rate Modulation Carrier
(+/-0.01%) (+/-0.01%) Freq
bps baud Hz
ZyX 19200 19,200
ZyX 16800 16,800
V.33 14,400 2400 128-TCM 1800
V.33 12,000 2400 64-TCM 1800
V.32bis 14,400 2400 128-TCM 1800
V.32bis 12,000 2400 64-TCM 1800
V.32bis 9,600 2400 32-TCM 1800
V.32bis 7,200 2400 16-TCM 1800
V.32 9,600 2400 32-TCM 1800
V.32 uncoded 9,600 2400 16-QAM 1800
V.32 4,800 2400 4-DPSK 1800
V.29 9,600 2400 16-QAM 1700
V.29 7,200 2400 8-QAM 1700
V.29 4,800 2400 4-DPSK 1700
V.27ter 4,800 1600 8-PSK 1800
V.27ter 2,400 1200 4-DPSK 1800
V.22bis 2,400 600 16-QAM 1200 Orig.
2400 Ans.
V.22 1,200 600 4-DPSK 1200 Orig.
(BELL 212A) 2400 Ans.
G3 Fax implemented according to T.30, V.17, V.29 and V.27ter.
1800 Hz guard tone for V.22bis/V.22 answer mode, 6 dB below data signal level.
Note: The U-1496R, U-1496E, U-1496E+, and U-1496B do not support the
V.33 14.4/12.0, V.29 9.6/7.2/4.8, or V.27ter 4.8/2.4 Kpbs standards.
All models have the G3 Fax send and receive capability with PC Fax software
Mac software available as an option.
The U-1496 Series Standard Features
Synchronous/Asynchronous operations for external stand-
alone model and rackmount model.
Asynchronous operations for PC internal card model.
MNP class 3/4/5 error correction/data compression.
V.42/V.42bis error correction/data compression.
Extended AT command set.
V.25bis command set. (Not available on U-1496B)
Operate on 2-wire dial-up line or 2/4-wire leased line.
(4-wire leased line on U-1496, U-1496+, and U-1496R only)
Auto-dial/answer and Manual originate/answer.
Tone/Pulse dialing.
Dial tone, busy, and ringback detection.
Programmable speaker volume control.
Non-volatile memory storage.
Diagnostics available for:
Modem full self test
Analog loopback (w/ self test)
Remote digital loopback (w/ self test)
Digital loopback
XON/XOFF or RTS/CTS flow control.
Line status monitoring available for: (U-1496, U-1496+, U-1496R)
Signal-to-noise ratio
Receive signal level
Frequency offset
Phase jitter
Retrain granted
Retrain requested
Round trip echo delay
Carrier loss counter
20 X 2 LCD display and directional keypads. (U-1496, U-1496+)
G3 Fax capability.
Caller ID (CND) support
Distinctive Ring
Voice Digitizing
ADPCM 3 bit 28800 bps
ADPCM 2 bit 19600 bps
CELP 9600 bps (only in Plus models)
MODEM FEATURE CHART
ZyXEL ZyXEL ZyXEL ZyXEL ZyXEL
U-1496+ U-1496 U-1496B U-1496E+ U-1496E
Physical EXT EXT INT EXT EXT
External Model V V V V
Internal Model V
Number of LED lights 6 6 N/A 12 12
Full LCD Menu Tree V V
Speed and Compatibility
ZyXEL 19.2 Kbps * *
ZyXEL 16.8 Kbps V V Opt. V V
V.32bis 14.4, 12.0, 7.2 kbps V V V V V
V.32 9.6, 4.8 kbps V V V V V
V.23 1200/75 bps V V V V V
V.22bis 2400 bps V V V V V
V.22/BELL 212A 1200 bps V V V V V
V.21/BELL 103 300 bps V V V V V
V.33 14.4, 12.0 kbps V V
V.29 9.6, 7.2, 4.8 kbps V V
V.27ter 4.8, 2.4 kbps V V
HST 14.4, 12.0, 9.6, 4.8 kbps
G3 FAX, 9.6 kpbs V V V V V
G3 FAX, V.17 14,400 kbps V V V V V
EIA Class 2 FAX Standard V V V V V
Asynchronous Transmission V V V V V
Synchronous Transmission V V V V
Dynamic Online Full back/forward V V V V V
Auto Speed Detect V V V V V
Error Correction/Data Compression
MNP 3-4 V V V V V
MNP 5 V V V V V
V.42 V V V V V
V.42bis V V V V V
Throughput / DTE rate
Max. Throughput Possible (K) 76.8 57.6 57.6 76.8 57.6
DTE speed (K) (max) 76.8 57.6 57.6 76.8 57.6
ZyXEL ZyXEL ZyXEL ZyXEL ZyXEL
U-1496+ U-1496 U-1496B U-1496E+ U-1496E
Operation Mode
2-Wire Dial Up V V V V V
2-Wire Leased V V V V V
4-Wire Leased V V
Dial Backup V V
Diagnostic Modes
Remote Digital Loopback V V V V V
Analog Loopback V V V V V
Digital Loopback V V V V V
On line, line condition monitoring V V
Read/Write Remote Configuration V V V V V
Reset Remote Configuration V V V V V
Security
Password Protection V V V V V
Automatic Call Back V V V V V
Other
Caller ID (CND) detection V V V V V
Distinctive Ring V V V V V
Voice Digitizing V V Opt. V V
Also Included
Telephone Cord (RJ-11) V V V V V
RJ-45 Cord V V
AC Power Adaptor V V V V
Communication Software
ZFAX Voice and Fax Utility V V V V V
Warranty, Parts and Labor (years) 5 5 5 5 5
Money Back (days) 30 30 30 30 30
V = Standard Feature
* = Can be upgraded
Opt. = Optional
List Price $989 899 449 649 469
469 for U-1496B/168
U-1496R has features that are similar to U-1496E+ and U-1496RN has features
that are similar to U-1496+, both U-1496R and U-1496RN will utilize the
40 X 4 LCD display and Menu Tree that come with the Rack.
U-1496R $ 899
U-1496RN $ 1099
RS1600 $ 1299
RS1600N $ 1950
U-1496/U-1496+ Front Panel
There are 6 LED indicators, a 20 X 2 LCD display, and four arrow key.
U-1496/U-1496+ Front Panel Indicators
LED Indicators
PWR Power ON indicator, lights up when U-1496 is turned ON.
OH Off-Hook indicator, lights up when U-1496 is in data mode
or off-hook, and goes out when U-1496 is in talk mode or
on-hook.
AA Auto-Answer indicator, lights up when U-1496 is in the Auto-
Answer Mode; flashes when modem rings.
DTR Data Terminal Ready indicator, lights up when your DTE or
Computer indicates that it is ready to begin communication.
TXD Transmit indicator, flashes when your DTE/Computer trans-
mits data on the serial port.
RXD Receive indicator, flashes when your DTE/Computer recei-
ves data on the serial port.
U-1496 Front Panel Arrow Keys
The four arrow keys are for the panel operation manipulation. They
are for intuitive menu tree operation and status display.
U-1496/U-1496+ Rear Panel
The following explains the connectors and switch on the rear panel.
POWER Power switch, turns the U-1496 ON or OFF.
POWER Input terminal for power adapter.
JACK
NOTE: Use only ZyXEL power adapter supplied with the unit.
Connecting any other adapter will result in inoperability
of the U-1496, and could cause serious damage to the U-1496.
LEASED Leased-line JM8 terminal jack, for connection to a 2/4
LINE wire leased line.
DIAL-UP Dial-up line RJ11 terminal jack, for connection to a 2<197>
LINE wire dial-up line.
PHONE Telephone line RJ11 terminal jack, for connection to a
telephone set.
EIA-232D Serial port DB25S connector, for connection to the
serial port of DTE. Pin assignments are presented in
appendix A for your reference.
U-1496E/U-1496E+ Front Panel
There are 12 LED indicators and two switches.
U-1496E/U-1496E+ Front Panel Indicators
LED indicators
HS High Speed indicator, lights up when modem is in V.32 or
V.32bis mode.
AA Auto-Answer indicator, lights up when modem is in the Auto-
Answer mode; flashes when modem rings.
CD Carrier Detect indicator, lights up when a valid carrier is pre-
sent on the line.
OH Off-Hook indicator, lights up when modem is in data mode
or off-hook, and goes out when modem is in voice mode or
on-hook.
DTR Data Terminal Ready indicator, lights up when the DTE or
Computer indicates that it is ready for communication.
DSR Data Set Ready indicator, lights up when modem is ready
for communication.
CTS Clear To Send indicator, lights up when modem can accept
data for transmission.
TXD Transmit Data indicator, flashes when DTE/Computer is tran-
smitting data on the serial port.
RXD Receive Data indicator, flashes when the DTE/Computer is
receiving data on the serial port.
EC Error Control indicator, lights up when modem is operated
in an error control mode like MNP-4 or V.42.
SQ Signal Quality indicator, lights up when signal quality is
good; flashes when it is on margin.
TST Test indicator, lights up when modem is in a test mode.
U-1496E/U-1496E+ Front Panel Switches
VOICE/DATA A toggle switch that toggles the modem on-line
(off-hook, DATA mode) or off-line (on-hook,
VOICE mode, the telephone set is connected
to the line).
ANS/ORG A locked switch, it determines the modem is in
originate mode or answer mode when the
modem goes off-hook by toggling the VOICE/
DATA switch. Locked up position means answer
mode and locked down position means originate
mode.
U-1496E/U-1496E+ Rear Panel
U-1496E/U-1496E+ rear panel is the same as the U-1496/U-1496+
except that U-1496E/U-1496E+ does not have the leased line jack.
Refer to the U-1496/U-1496+ rear panel explanation for the U-1496E/U-1496E+
rear panel information.
--
Steve Pershing, SysAdmin <sp@questor.org> The QUESTOR Project
FREE access to Environ, Sci, Med, & AIDS news, and more. [also UUCP]
on a ZyXEL-U1496S+ => v.42bis, v.32bis, v.33, up to 16,800bps.
-=- -=- -=- -=-
Fones: (+1 604) Data: 681-0670 Telefax: 682-6160 Voice: 682-6659
========================================================================
Voice Mode + Ultra High Speed 16800 bps FOR
U-1496E and U-1496E PLUS
****************************************************
ZyXEL Q & A List
==============
Q-1, What is ZyXEL proprietary ultra high speed 16800 bps ?
-------------------------------------------------------------
Ans : ZyXEL 16800 bps scheme is full duplex, not like USR's HST design
which is only one way.
ZyXEL 16800 bos mode is an extesion of V.32bis, it has fast
speed shifting downward to and upward from V.32bis speeds according
to line condition.
Q-2, May we know more detail on U-1496E Plus model ?
----------------------------------------------------------------
Ans : U-1496E Plus model has a 68000-16 running at 20MHz. It
has larger SRAM space for digital signal processor (DSP). This
provides the power and flexibility for higher 19200 bps speed.
The possibility of higher speed depends on the complexity of
the scheme, computation power of the modem, and architecture
flexibility of the modem. ZyXEL can support 16800 bps on all
U-1496 series models now (except U1496B which does not have
1M sockets installed), for higher speed , we think the modem
needs more computation power so that not to degrade the performance.
We need more DSP memory to accommodate a more complicated scheme.
Q-3, Can user upgrade U1496E model into U1496E Plus model ?
------------------------------------------------------------------
Ans : Due to some hardware difference, ZyXEL's current U1496E is not
upgradable to PLUS model. It will be too messy to do the
hardware modification. The firware for the U1496E and E PLUS
is not inter changeable.
Q-4, What is your new feature --Caller ID in ZyXEL modem ?
------------------------------------------------------------
Ans : Normally called Caller Number Delivery (CND), this is a service
feature available from phone companies in some parts of USA and
in some other countries. With this service, the phone company
sends calling party information along with ring signal to the
called party. The major part of this information is the telephone
number of the calling party or so-called caller ID. ZyXEL modems can
detect and report caller ID.
Q-5, What is Distinctive Ring in your ZyXEL product ?
---------------------------------------------------------
Ans :This is a service feature available from some phone companies
in some area of USA and other countries. You can have several
phone numbers on the same subscriber phone line. The phone company
sends a different ring signal for each phone number assigned to the
same line.
You can have your phone equipments answer only to a certain type of ring
corresponding to a certain phone number. ZyXEL modems can be set to
answer on one of or a combination of 4 types of ring signal. There is a
problem that each country may have a different specification for
different ring types.
Q-6, What is Digitized Voice and CELP technology ?
--------------------------------------------------------------------------
Ans : Modem with digitized voice capability can digitize the incoming
voice message and the computer can store it as file. The modem can
also playback a recorded digital voice message either locally or to
the line as an announcement.
Digital voice message needs speech compression to reduce the storage
requirement. This speech compression is done in real time by the modem
and it does the decompression in playback. A simple voice capability
using ADPCM algorithm can reduce speech data rate to 1/2 or 1/3. We call
it advanced voice capability when it can reduce speech data rate even
further with advanced algorithm like CELP (Code Excited Linear Prediction)
.
Q-7, May we know more detail on VOICE mode ? Can it be used as an
answering machine ?
--------------------------------------------------------------------
Ans : In VOICE mode, the modem will digitize and compress the incoming voice
message from the telephone line and send it to the computer for storage
or forward. It will also playable the recorded voice message for local
listening or as announcement to the phone line. It will also detect DTMF
tone signal during recording that the computer program can detect and
respond to the tone signal from a push-button phone set. The simplest use
is as a digital answering machine or used in voice mail system. With voice
mode, you combine modem, fax, and voice capability in one single device.
Q-8, When will V.fast standard be included in ZyXEL modems ? How fast will
the standard be ?
-----------------------------------------------------------------------------
Ans : We do not know when the V.fast standard will be settled and ZyXEL can not
promise when we will implement it. We must have the detail of the standard
before we can have an estimation. There are only talking (paper
presentation) but not a draft standard about what speed will be included
in V.fast. Proposed speed include 24k bps, 25.6k bps, and 28.8k bps.
You need a perfect line to get that high speed , most probably you can
only get 19.2k bps speed on the real line connection.
Q-9, How to process U-1496 series modem firmware upgrade with 1Mbit EPROM ?
----------------------------------------------------------------------------
Ans : The 1Mbit EPROM has 32pins while the 512K EPROM has only 28 pins.
Among the four additional pins the 1M bit EPROM has, only pin 2 and
pin 32 need signal correction, pin 1 and pin 31 have no connection
inside the chip. If you put 1Mbit EPROM chip in front of you with
pin 1 on the lower left corner, the 28 pins on the right have the
same signal connection as the 512K EPROM chip.
There are three cases for 1Mbit firmware upgrade:
(1) There are already a pair of 32pin sockets installed on the modem main
board.
Just install the 1Mbit EPROMS in the 32-pin sockets. Note that there
are no pin sockets for pin 1 and pin 31, no connection is needed for
those two pins.
(2) 28-pin sockets on the modem board but pin holes on the board exist for
pin 2 and pin 32.
Solder in two single-pin sockets for pin 2 and pin 32 and you can
install the 1M bit EPROM. You need some skill to solder the single-pin
socket.
It is better to use a SIP 8-pin single-row pin socket as an alignment tool.
Plug the single-row pin socket into the existing socket and the single-pin
socket you want to solder and it will hold the single-pin socket in place
while you solder.
(3) 28 pin sockets on the modem board and no pin hole exists on the board for
pin 2 and pin 32.
We do NOT recommend to install 1Mbit EPROM on this case. You can do the
following hardware modifications but it will void the warranty and it is
difficult to remove and reprogram the EPROMS.
(a) Solder a jump-wire to short pin 32 and pin 30 of the EPROM.
(b) Install the 1Mbit EPROMS on the 28-pin sockets with the left 4pins
outside the sockets.
(c) Solder a wire to connect pin 2 of the EPROM to pin 45 of the MC68000
and solder a wire to short pin 30 and pin 32 of EPROM.
Q-10, Will it be possible to upgrade ZyXEL to V.fast just with changing the
firmware ?
----------------------------------------------------------------------------
Ans : ZyXEL does not promise any of this possibility. We can not promise a thing
that we do not know what it really is. V.fast may become too complicated
that we need to develop a new model for it.
Q-11, May we know the difference between ZyXEL 16800bps and US Robotics HST
16800bps ? Is it campatible with HST 16800 ?
----------------------------------------------------------------------------
Ans : HST 16800bps is USR's own protocol and is not compatible with any other
modems. HST is a one-way high speed modem, ZyXEL 16800bps is a
full-duplex high speed mode, it is an extention of V.32bis 14400bps and
will automatic shift speed downward to or upward from V.32bis speeds.
Q-12, Will it be able to detect data/fax/voice under Frontdoor/Binkley at the
same time?
----------------------------------------------------------------------------
Ans : It is difficult to include voice in auto-detection because there is no
standard and there is no way to specify how human voice should act or
response to a phone call. A commom method is to have the answer party
play a answering message first and check response. The problem is that
some data/fax devices may be confused by this voice message and not
connected and normal data/fax connection will take longer. ZyXEL is
working on a optimum way to do it that it will have a minimum missing
rate or connection delay.
Q-13, How often is there released new ROM/ZFAX versions?
----------------------------------------------------------------------------
Ans : Usually, we have a new version when we have new ROM code which is
different from the previous version. Many version are for beta tester and
many intermediate versions have some small changes/additions for some
specific condition or use and most users are not affected. It is strongly
suggested that normal users should not bother to update to each version
unless its use is affected. Update to a major formal release once every
2-6 month is enough. We will differentiate a major release from some
intermediate versions to save user/dealer's trouble. Software version is
much easier for user to update. Since we were doing major Zfax2.0 update,
we didn't have so often a zfax version in the past.
========================================================================
ZyXEL Tech support BBS/voice numbers:
ZyXEL, Tawain
BBS: 886-35-787045
Voice: 886-35-783942
FAX: 886-35-782439
TCL Technology, Hong Kong
BBS: (852) 574-6040
Voice: (852) 891-3281
FAX: (852) 891-6335
ZyXEL, USA (formerly 0/1 Networking)
BBS: 714-693-0762
Voice: 714-693-0808
or: 800-255-4101
FAX: 714-693-8811
OCOMP Optimizing COMPuters, Canada
Voice: (416) 534-1508
E-Mail: gvb@telly.on.ca