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       The following information can help you solve certain problems with your
       Intel product.  "(Field report)" means that the information comes from
       a customer and may not have been verified by Intel's compatibility lab.


   TESTCOM.EXE

       TESTCOM.EXE is a menu-driven diagnostic program that tests your modem.
       With TESTCOM, you can do the following:

          Run Modem diagnostic test

          Check phone line connection

          Call the Intel Bulletin Board Service (BBS)

       You need both the TESTCOM.EXE and PHONE.BBS files on the disk from
       which you run TESTCOM.  (PHONE.BBS is a data file with the BBS phone
       number.)

       If TESTCOM successfully connects with the Intel BBS, the modem hardware
       is working properly.  Any problems encountered with other communication
       programs are probably from improper configuration or execution.

       NOTE:   TESTCOM is not a substitute for communications software.  You
               need a program such as Crosstalk, Procomm, or Smartcom for
               normal modem communications.


   TESTCOM & OS/2

       TESTCOM won't run in either the OS/2 environment or the OS/2
       compatibility box.  Currently, no communications software runs in the
       OS/2 compatibility box.


   TESTCOM FAILS DIGITAL TEST

       (Field report)  A Silencer power supply can cause TESTCOM to fail the
       digital test.  The power supply provides the incorrect voltage.



   TESTCOM PASSES -- OTHER PROGRAMS FAIL


       If your modem passes all the tests in TESTCOM but your communications
       program fails, look for IRQ conflicts.  TESTCOM doesn't use IRQs, but
       some communications programs, like Procomm, do.  Check for other
       devices which use an IRQ such as serial ports, mouse boards, scanner
       boards, LAN boards, etc.  Read the modem installation guide to

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       determine which IRQ your modem is using.  Set the modem and other
       devices so they don't conflict.

       NOTE:   COM 1 and COM 3 use IRQ4 and COM 2 and COM 4 use IRQ3 in
               classic bus systems. In microchannel systems, COM 1 uses IRQ4
               and COM 2-7 use IRQ3.


   STUCK AFTER "EXECUTING AUTOMATIC LOGON..."

       CAUSE:  This message may appear when using the "Call Intel BBS"
               feature.  You can get stuck with the message on screen if any
               of the followin happens:

          a bad connection to the BBS

          the BBS was unexpectedly locked up and the modems were still
           answering

          the automatic logon has been temporarily changed.


       CURE:   Try the call again later.

   TESTCOM'S HIDDEN MENU SELECTIONS

       TESTCOM's main menu contains two selections that aren't displayed and
       aren't mentioned in the TESTCOM documentation.  These two selections
       can help you verify your modem's operation.  The two hidden selections
       are as follows:

       (5) Lets you directly access the AT command set from the keyboard and
       control the modem at 1200 BPS.

       (6) Lets you directly access the AT command set from the keyboard and
       control the modem at 2400 BPS.

       Pressing the ESC key exits from these options.











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   SERIAL PORTS & INTERRUPTS

                   |--------------------------------------------|
                   |                 Interrupts                 |
           |-------|---------|---------|--------------|---------|
           |       |  Above  |  2400B  |  Connection  |         |
           |       |  Board  | Classic | CoProcessor  |  2400B  |
           | Port  | Serial  |  Modem  | Modem Option | Modem 2 |
           |=======|=========|=========|==============|=========|
           | COM 1 |  IRQ 4  |  IRQ 4  |    IRQ 4     |  IRQ 4  |
           | (3F8) |         |         |              |         |
           |-------|---------|---------|--------------|---------|
           | COM 2 |  IRQ 3  |  IRQ 3  |    IRQ 3     |  IRQ 3  |
           | (2F8) |         |         |              |         |
           |-------|---------|---------|--------------|---------|
           | COM 3 |  IRQ 2  |  IRQ 4  |    IRQ 4     |  IRQ 3  |
           | (3E8) |         |         | or IRQ 5     |  IRQ 3  |
           |-------|---------|---------|--------------|---------|
           | COM 4 |  IRQ 5  |  IRQ 3  |    IRQ 3     |  IRQ 3  |
           | (2E8) |         |         | or IRQ 2     |  IRQ 3  |
           |-------|---------|---------|--------------|---------|
           | COM 5 |   NA    |   NA    |     NA       |  IRQ 3  |
           |-------|---------|---------|--------------|---------|
           | COM 6 |   NA    |   NA    |     NA       |  IRQ 3  |
           |-------|---------|---------|--------------|---------|
           | COM 7 |   NA    |   NA    |     NA       |  IRQ 3  |
           |-------|---------|---------|--------------|---------|

       In PS/2 computers,  COM ports 3 through 7 always use IRQ 3.  Classic
       bus computers have no industry standard defining the IRQ for COM ports
       3 and 4.  The Connection CoProcessor 2400B Modem Option has switches
       that let you to choose between two IRQs for COM 3 and 4.  Above Board
       serial port addresses and IRQs are independently selectable.  The
       values shown for Above Board are Intel's recommendations.


   SWITCHED DIGITAL PHONE LINES

       Modems don't work on switched digital phone lines.  You should check
       with the phone company to find out if you're connected to a switched
       digital lines.  Modems will work on switched analog lines.








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