        #
        | README file for the firmware upload files
        |
        | TLPROJEU.220, TLPROJUU.220, TLPROKEU.220, TLPROKUU.220,
        | BF_PROJ.102, BF_PROK.102
        |
        | Copyright (c) 1997 ELSA GmbH, Aachen (Germany)
        |
        |                                     Subsidiary:
        | ELSA GmbH                           ELSA Inc.
        | Sonnenweg 11                        2150 Trade Zone Blvd.
        | D-52070 Aachen                      Suite 101
        | Germany                             San Jose, CA 95131
        |                                     USA
        |
        | Phone      : +49-241-9177-0         Phone: +1-408-935-0350
        | Support Fax: +49-241-9177-113       Phone: +1-800-272-ELSA
        | BBS (modem): +49-241-9177-981       Fax  : +1-408-935-0370
        | BBS (ISDN) : +49-241-9177-7800      BBS  : +1-408-935-0380
        | CompuServe : GO ELSA                CIS  : GO ELSA
        | WWW        : http://www.elsa.de     WWW  : http://www.elsa.com
        |
        | 02/17/97, FMichiel, MHodhson



        Overview of Contents

        1.      Overview
        2.      Files Included
        3.      The new Firmware Loader v1.02
        4.      Firmware Upload Guide
        5.      Trouble Shooting


------------------------------------------------------------------------

1.      Overview

        This directory contains the current firmware for the  
        ISDN terminal adapter MicroLink ISDN/TLpro in the form of
        update files.

        If your ISDN terminal adapter is already equipped with a
        Flash-ROM for the firmware, then an AT command can load the new
        firmware from your PC into the terminal adapter.  The firmware
        files are in this directory.

------------------------------------------------------------------------

2.      Files Included

        BF_PROJ.102    Update for the TLpro firmware loader for
                       hardware release J (upload file)
        BF_PROK.102    Update for the TLpro firmware loader for
                       hardware release K (upload file)
        TLPROJEU.220   Upload file for updating the firmware of                      
                       MicroLink ISDN/TLpro with hardware release J
                       for European D channel protocols DSS1 and 1TR6
        TLPROJUU.220   Upload file for updating the firmware of
                       MicroLink ISDN/TLpro with hardware release J
                       for US D channel protocols AT&T 5ESS and NI-1
        TLPROKEU.220   Upload file for updating the firmware of
                       MicroLink ISDN/TLpro with hardware release K
                       for European D channel protocols DSS1 and 1TR6
        TLPROKUU.220   Upload file for updating the firmware of
                       MicroLink ISDN/TLpro with hardware release K
                       for US D channel protocols AT&T 5ESS and NI-1

        TLP_220.TXT    Revision Notes (in German)
        TLP_220E.TXT   Revision Notes

        LIESMICH.TXT   This file in German
        README.TXT     This file


------------------------------------------------------------------------

3.      The new Firmware Loader v1.02

        Check with the AT command ATUPX, if your TLpro already contains
        this loader. In this case you can load a new firmware according
        to section 4. 

        The new Firmware Loader gives you the chance to override the
        effects of an unsuccessful firmware upload, for example if the
        terminal adapter no longer reacts and you cannot enter any AT 
	commands (see below).
        A failure of the firmware is indicated by the continual blinking
        of the yellow "Line" LED, and the terminal adapter no longer 
	reacts to AT commands.
                                         
3.1     Installing the Firmware Loader

        To activate the Firmware Loader, you should upload the file
        BF_PROJ.102 for release J hardware devices or BF_PROK.102 for
        release K hardware devices.
        The hardware version of your device is displayed by the AT
        command ATI6.
        File upload is described in section 4, steps 1) to 5).

        IMPORTANT:
        DO NOT DISTURB your computer or terminal adapter while uploading
        the Firmware Loader !!!


3.2     Operating the Firmware Loader

        The Firmware Loader will enable the the upload procedure to be
        activated.  Follow these steps:

        a)  Switch your terminal adapter off.

        b)  Start your terminal program (e.g. Telix) and set the data-
            rate to the terminal adapter to 38,400 bps.  Set the other
            data transfer parameters to  8N1.

        c)  Hold the return/enter key down and, keeping it pressed, 
            switch the terminal adapter on.
        
        d)  Your terminal adapter is now in the same mode as that after
            entering the ATUPX command.  You can now continue with the
            upload procedure as listed below, as of point 4).
                                                                   
------------------------------------------------------------------------

4.      Firmware Upload Guide

        A firmware update can be loaded into the Flash-ROM of your
        ISDN terminal adapter either with an AT command or with the
        Firmware Loader described above.  Follow these steps:

        1.)
        Start your terminal program (e.g. Telix) and set up your modem
        configuration for the MicroLink ISDN/TLpro.

        2.)
        IMPORTANT: Be certain to select a data transfer rate to the ISDN
                   terminal adapter which is smaller than or equal to
                   57,600 bps!

        3.)
        Now enter the command ATUPX.  This initializes the firmware
        upload.

        4.)
        In the terminal program, set the protocol for the upload to
        "XMODEM"

        5.)
        With the terminal program, start the upload (e.g. in Telix for
        Windows click on the "Upload" button or File|Upload) and select
        the file to be uploaded from its directory (on this CD).
        To check which firmware file you need, refer to section 2 of
        this file.

        The successful upload of a firmware file takes two to three
        minutes at 57,600 bps.  The message "!!! upload ok" will be
        displayed.  A delay will arise if a slower data transfer rate is
        used or if problems arise with the transfer of the data, for
        example when a data transfer rate is selected which is faster
        than the capabilities of the serial interface.

        NOTES: -Be aware that firmware can support the D channel
                protocols of either the European DSS1 or 1TR6 types or
                the US American AT&T 5ESS and NI-1 types.  If the ISDN
                terminal adapter is moved from one to the other of these
                areas, an update of the firmware would be essential.
                The D channel protocols supported by your firmware is
                displayed with the command "AT+IDP=?".

               -Be aware that uploading firmware cannot make a TLV.34
                out of your TLpro, or vice versa.  The terminal adapter
                will simply block the data transfer and display the
                message "!!! error: upload file is not valid for MicroLink
                ISDN/TLpro".


------------------------------------------------------------------------

5.      Trouble Shooting


      -If strange characters appear after entering the ATUPX command,
       then you have entered a data transfer rate greater than
       57,600bps.

       Solution: Select a lower data transfer rate.
        
      -If the message "ERROR" appears after the ATUPX command, then your
       MicroLink ISDN/TLpro is an earlier model which does not support
       firmware upload.

       Solution: Contact ELSA Support.

      -If, after the ATUPX command and successful data transfer, your
       ISDN terminal adapter malfunctions and displays that the wrong
       memory type was detected, then you have a MicroLink ISDN/TLpro
       equipped with EPROM.

       Solution: Contact ELSA Support.

      -The upload fails without any transfer of data.

       Solution: a)
                 Check that the data transfer protocol is set to
                 "XMODEM".

                 b)
                 You have chosen the wrong file for uploading.  Repeat
                 the upload and be sure to select the correct file.
                                                                   
------------------------------------------------------------------------
