ConeXant makes chipsets, not actual modems.

If you cannot figure out who made your modem, CLICK HERE for information concerning the FCC ID lookup tool

I have noticed problems recently with Packard Bell computers that come with modems that have a Rockwell Voice 33.6 (RCV336) chipset. The problem is that the modems connect at 33.6 every connection, but disconnect after a few minutes. The only solution t hat I have found to work reliably is to force the modem to connect at a lower speed. To do this add the following to Windows 95's extra settings:
+MS=11,1,26400,28800
This will force the modem to connect between 26,400 and 28,800
Some newer Supra modems (with the same chipset) seem to suffer from the same problem.

The links here became dated since ConeXant bought Rockwell and discontinued support. The information regarding making RPI modems work is still valid. Since the Rockwell site is no longer available, I have made the WinRPI drivers available for download. See below for more information.

Many 14,400 modems with Rockwell chipsets are RPI modems. For more information on what this means, please see the WinRPI FAQ (link below). To find out if you have an RPI modem, enter any Terminal program type "ATI3" (without the quotes). On occasion, "ATI3" does not report the proper chip information. In these cases, try also "ATI4" "ATI5" and "ATI6."
An RPI modem will answer with "...Rockwell (tm) RPI...." or may echo "Rockwell.... (tm) RPI+...." (which is an RPI+ modem, not a standard RPI). The most noticeable problem (at least on our systems) is e-mail not sending properly. If error correction is not present, e-mail messages will stall after about about 2K of the transmission in most cases. Lowering the baud rate of the modem to 9600 usually gets around this, but who wants to go that slow?

----Some models of rockwell chips require software drivers to perform Error Correction and Compression. Not all modem vendors supply the drivers when they sell the modem. The drivers are WinRPI or 95WinRPI and can be obtained from Rockwell's Web sight at:
http://www.nb.rockwell.com/techinfo/pc/rpi/winrpi.html
The drivers come with a setup program that changes the comm.drv line in system.ini to comm.drv=wrpi.drv. You must also add a command to the init string for the modem to utilize the drivers. The command is +H3 to lock the modem DTE to 57,600. If the modem has an RPI+ chipset (information obtained from issuing ATI3 to the modem), then the AT Command to add is +H13.

Here are some updated notes for configuring WinRPI drivers to be used with Windows 95. Please read the additional notes provided my myself and others before taking this as 100% fact.

This is what I have found to work recently in Windows 95. All files that I reference can be obtained from the following address:

Configuration Information for Windows 95

This page is also where I got this setup idea. Rockwell has recently dramatically improved the performance of RPI modems in Windows 95, and here is how I have done it in the past:

Download the following files onto a floppy disk:
rock_15.inf
mdmrock.inf
mdmdsi.inf

1.) I would first remove the modem by clicking Start >> Settings >> Control Panels >> Modem >> Select the modem >> click Remove.
2.) Go to Add Modems
Start >> Settings >> Control Panel >> Modems >> Add
3.) Do not allow autodetection.
Check "Don't detect my modem; I will select it from a list" followed by clicking on Next. Click Have Disk.. Then OK (after inserting the floppy with the downloaded .inf files).
4.) Choose Modem Model manually.
Now from the list, choose Rockwell RSS as the manufacturer, and then select V.32bis VOICE VV DS (or whatever best matches your modem). Click on Next.
5.) Choose appropriate COM port.
Choose the COM port device that corresponds to the modem that is being installed. Now Click on Next.
6.) Finish
Click on Finish

Please, before going through with this, get more information directly from Rockwell.

HERE THEY ARE!

Download the following:
Standard WinRPI Drivers
WinRPI95 Drivers
COMPLETE generic AT command reference for Rockwell modem chipsets including 14.4 (with and without RPI) and 28.8 modems