PC MMTA: MMTA and Digiboard Configurations

• Microsoft Mail Multitasking Message Transfer Agent, version 3.2

SUMMARY

In setting up a Digiboard product to work with version 3.2 of Microsoft Mail Multitasking Message Transfer Agent (MMTA), specific switches must be modified in order for the MMTA to run properly. For example, OS/2 will initialize all ports as data type E,7,1 and 1200 baud by default, unless otherwise specified with the Digiboard driver.

Example command line for Digiboard driver used with the MMTA:

   DEVICE=C:\DIGI\XALL.SYS /b:9600 /d:N81 /p:200 /m:D8000 /n:"digi"1

MORE INFORMATION

The Digiboard driver (XALL.SYS or similar) is loaded from the CONFIG.SYS file. The command format line syntax is described as follows.

NOTE: Only pertinent switches for the MMTA are defined:

   DEVICE=C:\DIGI\XALL.SYS /n:names /b:baud /d:data type /a:a

      where:

      /n: ---> Defines the naming convention for Digiboard ports

      If this switch is omitted, the first port will
      be named COM3, the second COM4 and so on by
      default. Regardless of how the ports are named,
      they must match the AsyncCommPort= settings in
      each EXTERNAL.INI instance.

      /b: ---> Sets the default baud rate to be used with all ports

      Since the OS/2 default baud rate for serial ports is
      only 1200, the switch should be included to obtain
      better performance. The switch will support up
      to 38,400 baud; however, more reliable results can
      be obtained by using rates of 19,200 or less.

      /d: ---> Sets the initial data type (parity, # of data bits,
               stop bit #)

      If this switch is not used, all serial ports will
      be set to even parity, 7 data and 1 stop bit(s).
      The MMTA requires no parity, 8 data bits and 1 stop
      bit for asynchronous connections.

      /a:a ---> Enables the alternate pin assignment of Carrier
                Detect (DCD)

                For Digiboard RJ45 port interfaces only.

      This switch will allow an 8-pin RJ45 cable to be
      used instead of a 10-pin RJ45 cable by re-assigning
      the Carrier Detect pin from pin 1 to pin 2. Using
      an 8-pin cable will also eliminate 2 signals, ring
      indictor (RI) and data set ready (DSR). This
      switch is not recommended for use with the MMTA,
      largely because RTS/CTS (hardware) handshaking
      requires the 2 eliminated signals.

      NOTE: Digiboard uses an additional pin assignment
      for cable shielding (GND) that is not
      required for the MMTA.