OSWAFXPR - RUNNING WINFAX PRO V3.0 UNDER OS/2 2.X
12/06/94

================================================================
                RUNNING WINFAX PRO V3.0
================================================================

Please Read Entire Document for Full Explanation of Procedures
----------------------------------------------------------------

RUNNING WINFAX PRO V3.0 UNDER OS/2 2.1


SYMPTOMS:

1. WinFax Pro v3.0 is compatible with OS/2 2.1, but you must
   first call the Vendor for the Service Release.

2. Since Windows exists in other than the Microsoft version,
   WinFax Pro may not run with OS/2 for Windows.

   OS/2 2.1 is a multitasking operating system that allows
   Windows or DOS applications to access the serial ports 1000
   times per second.  This is not frequent enough to allow
   reliable data transfer.  There is a special UART* that has
   the buffering capability to allow reliable data transfer.
   OS/2 2.1's serial port driver uses the buffering capability of
   this UART to increase the reliability of data transfers
   running at 9600 baud or higher.   The type of UART is known as
   16550A.  To send or receive data at 9600 baud reliably under
   OS/2, the serial port the fax modem is connected to must
   have a 16550A** UART.

   Internal modems have their UARTs built onto the modem card.
   Many of the high speed internal modems are equipped with
   16550A UARTs. External modems use an existing serial port in
   the computer. Most of these ports use 16450 UARTs.

   If either the internal modem or the computer's serial port
   does not allow for the upgrade of the existing UART to a
   16550A, then SIO drivers may help.

   If the modem or serial port is not equipped with a 16550A
   UART, the SIO drivers, which are shareware, are on OS/2
   BBS's and on Compuserve in the OS/2 file section.

   Version 1.02 was used in testing WinFax.

3. When these drivers are installed, some of the WIN-OS/2
   settings are removed and replaced with other settings.

4. SIO drivers are third party drivers.  For OS/2, they may
   require changes to the CONFIG.SYS to disable the use of the
   original COM.SYS and VCOM.SYS.

5. The SIO drivers enhance the performance of DOS and Windows
   applications running under OS/2 2.1 by:

   A.  Emulating a 16550 UART through software if one is not
       installed.
   B.  Allowing DOS and Windows applications to make better use
       of the 16550A UART if one is installed.  With a 16550A
       UART and WIN-OS/2 settings, the drivers do not need
       to be used for WinFax.  If you still have problems after
       changing the settings, the SIO drivers may help.

       A UART is essentially the heart of a serial port. It
       controls the transmission and reception of data to and
       from the computer.  The 16550A UART can hold up to 16
       bytes of information between port scancs whereas a
       conventional UART cannot hold more than one byte.  The
       original 16550 had a bug in its handling of its 16 byte
       buffer.  The 16550A corrected this.

       The 16550AFN and 16550AF UARTS are revised versions of
       the 16550A UART.  They work with the settings below.



RESOLUTION:

1. For Class 1 or 2 modems, change WIN-OS/2 settings as
   recommended below and edit SYSTEM.INI under .386Enh. section
   as indicated.
2. Note procedures for setting the baud rate.
3. Note procedures for using SIO drivers if the need arises.
4. WinFax Pro should run in full screen session and be left
   running in the foreground.



PROCEDURES:

1. WIN-OS/2 Settings:
        COM_HOLD             to ON
        HW_TIMER             to ON
        INT_DURING_IO        to ON
        IDLE_SENSITIVITY     to 100
        IDLE_SECONDS         to 60

   NOTE: IDLE_SENSITIVITY and IDLE_SECONDS may vary between
         systems, and in many cases can be left to default
         values.

2. A. For 14400 BPS fax modems, edit SYSTEM.INI in the .386Enh.
      section as follows:

              COM?FIFO=0
           where ?  is the com number being used.

   B. If running in an Enhanced Mode Windows session under OS/2
      2.1, edit SYSTEM.INI in the .386Enh. section as follows:

                       COM?BUFFER=4096
                       COMBOOSTTIME=30
           where ?  is the COM number being used.

3. With a Class 1 fax modem and a version of WinFax dated April
   1993 or later, WinFax allows for speed restrictions on both
   transmissions and receptions.  For send sending or receiving
   faxes at 9600 baud or above, edit the General section of
   the WINFAX.INI as follows:
   A. The example is for 7200 bps transmitting and 4800 bps
      receiving:

                       MaxTXspeed=7200
                       MaxRXspeed=4800

   B. Valid entries for MaxTXspeed are 14400, 12000, 9600, 7200
      and 4800 bps.
   C. Valid variables for MaxRXSpeed are 14400, 9600, 4800 baud.
      NOTE: 1. To find the version date of WinFax, select Help,
               then About from the main WinFax screen.
            2. There is an update if the WinFax version is
               January 1993 or earlier.

4. For SIO drivers, REM lines in CONFIG.SYS that refer to COM.SYS
   and VCOM.SYS.
   NOTE:  Original serial port drivers should be REMed because
          the SIO drivers aren't an exact replacement for the
          serial port drivers shipped with OS/2 2.1.

5. WinFax may not install properly if the SIO drivers are
   running.  If this is the case REM the SIO drivers to enable
   the original serial port drivers.  Once installation is
   completed, REM COM.SYS and VCOM.SYS, then unREM SIO drivers.