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   Ί                                                                         Ί
   Ί              Setting Up a Modem in a UNIX/XENIX System                  Ί
   Ί                                                                         Ί
   ΘΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΌ


    UNIX/XENIX BASED OPERATING SYSTEMS

        UNIX, XENIX, VMS and ULTRIX
        Setting up a modem for an operating system other than DOS can be
        tricky. There are so many different varieties of each operating system
        that there is no one setup that will work with them all.  This document
        describes the general configuration requirements of most non-DOS
        operating systems.  Consult your operating system's documentation for
        more specific information.

        To use a modem in a non-DOS operating system, you must:

        1.  Configure the computer's serial port for the highest baud rate the
            modem supports.
        2.  Connect the modem to the port.
        3.  Configure the modem.

        CONFIGURE THE SERIAL PORT

        The first step is to configure the serial port you want to use for the
        modem.  You can download instructions for configuring SCO Xenix from
        Intel's BBS. Download 9600XENX.TXT from the "Modem" section of the
        "Files Download" menu. For other operating systems, read the manuals or
        contact the manufacturer for serial port configuration information.

        Since calling modems can never connect at a speed faster the the modem-
        to-computer connection, always configure the serial port for the
        maximum modem through-put speed.  For example, if a 9600EX is connected
        to a computer at 4800 baud, 4800 is the fastest rate at which any modem
        can connect.  If the serial port cannot match the maximum modem
        through-put, select the next highest available speed.  Here are the
        recommended settings for Intel modems:

                          Maximum
            Modem                Through-put
            -----------------    -----------
            SatisFAXtion/400E       57600
            14.4EX                  57600
            9600EX                  38400
            2400EX MNP               4800
            2400EX                   2400

        Also, you must enable CTS/RTS flow control on the serial port if you
        want to allow "Reliable" connections.  Reliable connections use MNP or
        CCITT error correction and data compression protocols to ensure
        accurate data transfer and maximum through-put.

        CONNECT THE MODEM TO THE PORT

        Once the serial port is configured, you need the correct cable to
        connect the serial port to the modem.  FaxBACK document 4300 shows the
        correct cable configuration.


   ΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝ

   June 4, 1992              Intel FaxBACK # 4350                       Page 1


   ΙΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝ»
   Ί                                                                         Ί
   Ί              Setting Up a Modem in a UNIX/XENIX System                  Ί
   Ί                                                                         Ί
   ΘΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝ (continued) ΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΌ

        CONFIGURE THE MODEM
        Lastly, you must configure the modem correctly.  There are many
        possible configurations, but Unix/Xenix documentation often suggests
        this string:

            ATE0Q1S0=1&C1&D0\J0\N3\Q3&W

        Intel does not guarantee this command will work with all operating
        systems, but you can use it as a basis to begin modem configuration.
        Here is a description of the commands in the configuration string:

        Modem Command    Function
        -------------    --------
           AT            Attention code.  Must be first in line
           E0            Modem doesn't echo
           Q1            Modem doesn't display result codes
           S0=1          Modem answers after 1 ring
           &C1           Carrier Detect signal always on
           &D0           Ignore DTR signal from mainframe
           \J0           Disable serial baud rate adjust
           \N3           Auto-reliable mode (MNP active)
           \Q3           Bi-directional CTS/RTS flow control
           &W            Save configuration to non-volatile RAM

        If you're receiving data from a main frame and losing characters,
        there's a good chance that the cable and/or the operating system
        doesn't have CTS/RTS flow control enabled. Refer to your reference
        manual for the operating system, contact your system administrator, or
        contact the manufacturer of the operating system to find out how to
        enable CTS/RTS.

        Some operating systems require that the Data Carrier Detect (DCD or CD)
        signal remain "ON" at all times. Issue the command  AT&C0&W  to turn on
        DCD permanently.  Make sure your serial cable has a wire connecting the
        modem's DCD signal (pin 8) to the computer's DCD signal.
        If you still have problems using the modem after trying these
        suggestions, contact the manufacturer of the operating system and ask
        them how to install a Hayes 2400 baud modem.  Follow the instructions
        except, if you're using a 9600EX, set the serial port baud rate to
        38,400bps.

        When the modem is correctly connected and configured, these LEDs on the
        front panel should be lighted.

        AA             Auto Answer
        TR   Terminal Ready









   ΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝ

   June 4, 1992              Intel FaxBACK # 4350                       Page 2