🚀 go-pugleaf

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                                      Daniel (Doni) Rosenzweig
                                        (in order of preference)
             drosenzw@gnn.com       drosenzw@its.brooklyn.cuny.edu
                           drosenzw@commspec.com
                           daniel.rosenzweig@nycps.nycenet.edu
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I.   Zoom Contact info (US and UK).               
II.  Zoom v.34 (28.8) ROM info- including installation instructions.
III. Zoom 14.4 PC/EX (RPI) info.
               
I.              ZOOM TELEPHONICS - ALL TIMES EASTERN

Sales             800-666-6191  9-6 M-F (Switchboard 8:30-6)
Voice Main        617-423-1072  8:30-6
Voice Tech Supp.  617-423-1076  8:30-11 M-F 9-5 Sat
Pay Tech Supp.    900-555-COMM  95 cents/min 8:30-6 M-F
Repairs           617-423-2564    
Fax               617-423-5536  24 hrs
Faxback           617-423-4651  24 hrs
BBS               617-423-3733  24 hrs
AOL (keyword)     zoomt     
AOL Email         ZoomRep
Compuserve    GO  ZOOM                
Compuserve Email  76711,770
Internet Email    ZoomRep@aol.com    (Tech support)
Internet Email    76711.770@compuserve.com (Tech support)
Internet Email    zoom@zoomtel.com   (General- will forward msgs, so slow)
WWW Homepage      http://www.zoomtel.com
WWW Tech Sup form http://www.zoomtel.com/tech-sup.html 
                                                      
Zoom Telephonics
207 South Street      
Boston, MA 02111

Zoom recommends that Internet users fill out the WWW tech support form
versus using the Email addresses.
Each of the online services and the BBS have seperate Zoom tech support 
representatives. The zoomrep email address has more than one.

Voice Tech Support UK  44 (0) 171 720 0585 
Fax                    44 (0) 171 720 2464

Address:  Zoom Telephonics UK
          1e Tideway Industrial Estate
          Kirtling Street
          London SW8 5BP
          U K


They also have a few other international offices....
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Besides Zoom's WWW site, BBS and faxback, Rockwell's WWW site has some
useful information.  http://www.nb.rockwell.com
The Baudman and v.34 sections are very useful.
-----------------------------------------------------------------------
II. Zoom v.34 ROM info

Newest Zoom v.34 ROM version 1.309  - Contact Zoom for free upgrade
that you install- instructions below.

The ver1.309 ROMs do _not_ apply to the WorldWide chipset (as used in the
BABT approved V34) (--Richard Town)

To check what version ROM you have, type at i3 in your communications
program.

Improvements:
A)Fixed dropped carrier problems
B)Increased connect speed
C)Improved LAPM
D)Fixed adaptive answering -false fax receive- problem 

NOTES ON CHANGING ROMS - FROM POSTING BY RICHARD TOWN
======================   (Take normal Static Precautions-
                               Use at your own risk)

If you've never changed a ROM chip before and feel a bit put off by
doing it yourself, then ask your supplier who'll be glad to help

There is a proper chip-puller tool (available from Maplins and any 
other good hobbys electronic parts outlet) for around #2.

Switch off your computer, switch off your monitor, switch off at the
mains.  Unplug your monitor from the supply (either at rear of your
computer or at the mains), unplug your computer.  Unplug your modem's
power cube (if external)  Remove the 'phone lead from your modem, remove 
the data lead (if an external modem).

For Internal Modems
-------------------
Remove your computer's case.  Gently remove the modem
card from its slot.   Place the two inward pointing prongs of the chip
puller between the old chip (you can recognise it as the only one
looking exactly the same as your replacement) and it's socket.  On
each of the short sides there should be a very slight gap.  Gently
squeeze the puller and the prongs should enter the gap.  Gently rock
the chip puller from left to right and you will see each side of the
ROM chip slowly rise.  As it rises you can gently decrease the "pull"
pressure upwards away from the modem.  It will slowly become more free.
Take the replacement ROM from its protective plastic case and hold length
-wise between thumb and forefinger.  The chip's label should not be
upside down!  Check that it's the same way round as the way the original
was socketed!  Place the new ROM over the vacant socket and gently 
squeeze the pins until they are exactly over the socket's holes.  Insert
pins into socket all the way along the chip's length.  When both rows of
pins are correctly located into socket, gentle thumb pressure will seat
the chip firmly into socket.  Do not press too hard!  Zoom Telephonics'
products are warrantied for seven years for the US versions and are
subject to continual improvement.  Do leave a slight gap (say 1/16 inch
between chip and socket) so if you need to update ROMs again it'll be
easier to change chips is another update is issued.

For External Modems
-------------------
There are two screws that hold the board down and two hex nuts on the 
back which hold the RS232 socket.  Remove all of these, then the modem's 
circuit board.  Now you can unbend the metal tabs which hold the metal 
shielding on the top of the board and remove the shielding.

Once you have the shielding off, it's just a matter of swapping the ROM 
chips as for the internal modem.  Be careful, the ROM in mine was in tight 
with no gap between the chip and its socket making it hard to get 
anything in to lever it up.  

IF YOU ARE NOT HAPPY ABOUT DOING IT YOURSELF THEN DO TAKE YOUR MODEM AND
REPLACEMENT CHIP BACK TO YOUR RESELLER.  

---------------
III. Zoom 14.4 EX/PC (RPI) info.

For 14.4 EX and 14.4 PC models 100 and 110 - which are RPI or RPI+ modems 
Serial # xxxZA1ixxx or xxxZA2ixxx are plain RPI models
Serial # xxxZF1ixxx or xxxZF4ixxx are RPI+ models 
If you type at i3 you'll get the ROM version which would also say RPI
or RPI+ after it.

These models (unlike other Zoom 14.4 models) need special software to be 
able to support Error Checking and Data Compression (ECC). The WinRPI driver 
gives this functionality to just about any Windows program. At the moment it 
only supports WIN 3.1- Rockwell is working on a WIN95 version.
Newer versions of these modem models come with WinRPI on the COMit disk. 

If WinRPI didn't come with your modem, you can get WinRPI (2.23) from the 
Zoom BBS or WWW site at 
http://www.zoomtel.com/files/util/WINRPI.EXE

Rockwell has just released WinRPI version 2.26. Even if you have WinRPI 
included with your modem, you may want to download this new version (bug 
fixes).
http://www.nb.rockwell.com/ref/rpi/wrpi_226.zip

Instructions for installation- including how to change your initialization
string on your communications program (e.g. Procomm, AOL, Winsock)
- WHICH IS VERY IMPORTANT- are included. 

RPI+ models use standard AT commands to control ECC. Plain RPI models have
their ECC controlled via the program that supplies the ECC functionality.
Older RPI models don't support WinRPI. As of now at least, there is no 
such thing as RPI on 28.8 modems.
(Last updated Nov 5, 1995)