Release Notes PN 93000580_A1

                         Digi Connect WAN IA
                       (Cellular Modbus Bridge)

                            82001323_A1 EOS

                             May 10, 2006


INTRODUCTION

    This is a production release of firmware for the Digi Connect WAN IA.
    The WAN IA starts with the feature set of the Digi Connect VPN, then 
    adds a Modbus bridge for multi-master access and mixing of protocols
    such as Modbus/TCP, Modbus/UDP, Modbus/RTU, and Modbus/ASCII.  
    (ModbusPlus requires dedicated hardware and IS NOT supported)
    
    The Digi Connect WAN IA, part of the Digi Cellular Product Family,
    provides an alternative to traditional wired TCP/IP Wide Area Networks (WANs), 
    utilizing global wireless Cellular, and IPSec VPN  technology to create 
    secure primary and backup network connectivity. 
    They offer an easy, cost-effective, means of securely connecting virtually
    any remote location or device into the corporate IP network.

    The Modbus Bridge functionality enables remote Masters to connect via both
    the Cellular IP network and the local Ethernet. It supports:
    - Modbus/TCP transported by TCP/IP or UDP/IP
    - Modbus/RTU transported by serial, TCP/IP, or UDP/IP
    - Modbus/ASCII transported by serial, TCP/IP, or UDP/IP
    See Digi Document 90000773 for more details on the Modbus Bridge

    The standard Digi Connect WAN IA hardware includes screw terminals for
    10-30vdc power supply and EIA-232/422/485 field selectable serial port.
    
SUPPORTED PRODUCTS

    Digi Connect WAN IA EDGE10
    Digi Connect WAN IA 1X

ENHANCEMENTS

    N/A
    
    The Factory Default configuration consists of:
    - IP address is assigned by DHCP client
    - Internal DHCP server is disabled
    - Serial login (terminal) is disabled
    - Modbus/TCP Masters incoming on TCP port 502 and UDP port 502
    - Modbus/RTU Masters incoming on TCP port 2101 and UDP port 2101
     (Note: matches serial config, so changes to Modbus/ASCII when 
            serial port changed to Modbus/ASCII)
    - Modbus/RTU serial slave on port 1, settings 9600:8,N,1
    - Incoming Unit Id or Slave Address 0 treated as 1, not broadcast
    - Incoming Unit Id or Slave Address 1 to 32 assumed on serial port
    - Incoming Unit Id or Slave Address 33 to 254 assumed to be Modbus/TCP
      slaves (servers) on local Ethernet port. Slave Address is used for
      mast octet of local IP, so if WAN IA has the IP 192.168.2.1, then
      local slaves assumed to be at 192.168.2.33 to 192.168.2.254.
    - Incoming Unit Id or Slave Address 255 returns 0x0A exception
    - Default timeouts:
      *) Serial or Modbus/TCP slave response in 1 second
      *) Serial responses with less than 20 msec of inter-byte gap
      *) IP requests with less than 30 seconds of inter-byte gap (required
         to assemble fragmented TCP/IP via cellular link)

    To disable the Modbus Bridge, just change the serial port profile
    to anything other than ia or Industrial Automation. The ia configuration 
    may be damaged while profile is not ia. Setting the profile back to ia
    may cause a factory default configuration to be restored.
    
    To use the WAN IA as a normal WAN or VPN device, change the serial port
    profile to anything other than ia or Industrial Automation. Then modify the
    network, DHCP, and router configuration as desired.
                 
BUG FIXES
     
    Fixed an issue, where, in certain circumstances, the device would not 
    retain the correct default IP address assignment configuration (18544)

KNOWN ISSUES

  - The Modbus Bridge must be configured by Telnet and Command Line. At 
    present the Web UI only allows disabling the Modbus bridge or changing 
    the basic serial settings.
    
  - Digi RealPort can only be used if the Modbus Bridge function is 
    disabled. You cannot use RealPort with Modbus/RTU or ASCII to access
    the Modbus Bridge function.
    
  - Do not attempt to "Port Forward" TCP 502 or UDP 502 to local Modbus/TCP
    servers while the Modbus Bridge is active - this causes NEITHER function
    to work.  Disable the Modbus Bridge if you desire tradtional Router/NAT 
    function for Modbus/TCP port 502.
    
  - If you disable the Modbus Bridge or it stops working due to other
    configuration changes you have made (on purpose or accidently), then
    the safest way to restore the Modbus Bridge is to hold the blue reset
    button while powering up the WAN IA to do a hardware configuration 
    reset. Doing a Default Reset by the Web UI may not fully clear certain
    low-level settings.

DOCUMENTATION ERRATA

    None.

HISTORY

    82001323A1 - May 10, 2006

    Fixed an issue, where, in certain circumstances, the device would not 
    retain the correct default IP address assignment configuration (18544)

    82001323A - Feb 17, 2006

        Initial release.