Loading system images into the Access 1000 and 4000
---------------------------------------------------

Generally, system updates should be performed or monitored by qualified 
Microtronix personnel.  For units out of warranty, this service will require
the purchase of a support contract, or a repair service.  A repair service will
be required if the following procedures do not work or successfully correct 
the system problem.

Overview:
---------

The following system images may be uploaded into the Access 1000/4000.

1) U-Boot boot/loader      File name: u-boot.bin
2) Linux kernel image      File name: uImage
3) Linux root filesystem   File name: jffs2.img 

These binary image files can only be loaded from a TFTP server via the serial 
console of the Access (WAN 1 of the Access 4000, WAN 0 of the Access 1000).


Requirements:
-------------

1) TFTP server platform on a reachable network.
2) Serial RS232 DB25M-DB9F console or modem adapter cable.
3) Serial COM port on a PC.  This could be a USB serial adapter.
4) Terminal emulator on the PC, for example, "PuTTY".
5) Ethernet connection to provide IP access for the Access.
6) IP network parameters for the Access (IP address, network mask, IP gateway).


Steps to reload system images:
------------------------------

1) Set up and start the TFTP server.  Put the file(s) into it's root directory.
   Use the server's IP address to program into the Access at step 7).

2) If reloading the root file system, backup current system as all system and 
   application configuration will be lost.  Use the Maintenance page of the 
   web UI, Configuration section.  Click the Save button to open a file window 
   to your PC.
   Skip this step if the Access will not run.

3) Connect the serial cable between the Access console port and the serial port 
   on your PC.

4) Start the terminal emulator on your PC to access its serial port.  Configure
   the serial settings to 9600-N-8-1.

5) Power up the Access.  There is a 10 second delay in the boot-up that allows
   access to the U-Boot loader.  It will display a prompt indicating so.
   Enter the password "foad".  You should get an "A4K:>" prompt.

6) The default IP network parameters may be displayed using U-Boot commands:

       print ipaddr
       print netmask
       print gatewayip

   Change the default values as required (for example 10.1.1.240) using the commands:

       set ipaddr 10.1.1.240
       set netmask 255.255.255.0
       set gatewayip 10.1.1.1
       save

7) Set the TFTP server IP address from above into the U-Boot configuration:

       set serverip <TFTP IP address>
       save

8) Check the network connection by pinging the TFTP server using the command:

       ping <TFTP IP address>

   If no response, try pinging another known IP address.
   
9) Download the system image(s) by running the relevant command(s):

      run updateuboot
      run updatekernel
      run updatefs

   Wait for each command to finish processing and return to the prompt.
   Allow for a few more seconds to ensure flash write operation completes.

10) Reboot the Access.  Use the "boot" command, or re-apply power.

      boot
      
   Wait about 10 seconds, then try to access the web UI from an internet browser.
   Telnet or ssh access should be available to access a Linux command prompt.


Once the file system has reloaded, the application package(s) will need to be 
reloaded.  The package could be one or more of:

  X.25 Gateway
  Terminal Server
  Synchronous server
  CDR Collectiom Manager
  MWI Gateway

Refer to the "Application_upgrade" file for instructions.

When all relevant applications are reloaded, restore the saved configuration.