User's Manual

User manual Version 1.2
ABLELink
®
Ethernet-Serial Server
GW21W-MAXI
Copyright © 2003 Atop Technologies, Inc.
All rights reserved. Designed in Taiwan.
10 / 56
3. Hardware Installation
■ Prepare necessary cables, hub, power cord and RS-232/RS-485 connector.
■ Place GW21W-MAXI to the area that an access point can cover.
■ Connect a serial device to a serial port of GW21W-MAXI, make sure the right connection of either
RS-232 or RS-485.
■ Plug in DC-9-30V, the buzzer will beep and the RUN LED will blink if GW21W-MAXI functions normally.
Please refer to Appendix A.4 to see all of LED messages.
■ Use monitor.exe configuration utility in the product CD or diskette to diagnose GW21W-MAXI. If it
starts up successfully, you are able to find the IP and MAC addresses of GW21W-MAXI. You can change
the network parameters of GW21W-MAXI to join your LAN by changing its IP address, gateway IP
address and subnet mask.
Note: If there are more than one access points, the access point’s ESSID must be the same.
3.1 Configuration
Atop GW21W-MAXI Ethernet-Serial Server is shipped with default settings shown in the following table:
Property Default Value
IP Address 10.0.50.100
Gateway 10.0.0.254
Subnet Mask 255.255.0.0
User Name admin
Password Null
COM 1 9600,None,8,1,No flow control, buffer disabled, packet delimiter timer 1ms
Link 1 Type: TCP Server, Listen port 4660, Filter=0.0.0.0, Virtual COM disabled
SysName of SNMP name
SysLocation of SNMP location
SysContact of SNMP contact
NOTE: Atop provides a reset button to restore system settings including IP address, gateway IP address
and subnet mask etc. to the defaults. Press and hold the reset button for 5 seconds till the server reboots.
3.2 Assigning a new IP Address by ARP command
Arp –s is used to assign a static IP address of GW21W-MAXI and add this static entries to the Arp cache
of the computer, when TCP/IP packet with destination port number 1 is sent to GW21W-MAXI, it causes
the device to check its MAC address with IP address, once GW21W-MAXI finds those two unmatched, it
will reboot and change to the new IP address which was set by Arp –s command. The following example
uses ARP to assign a static IP address of GW21W-MAXI using its MAC address printed on the label of
the rear panel, then use Telnet to send the TCP/IP packet with destination port number 1 to
GW21W-MAXI, after GW21W-MAXI reboots it will change its IP address to the new one.