Hi,
I gather that all devices are getting their IP addresses from the DHCP in the ADSL router, if so you will have disable the DHCP in the router, give the router ethernet connection it's own fixed IP, then in the TCPIP section on each workstation's NIC set the fixed IP that you want, and set the gateway to the IP address that you gave the Router.

Also set the DNS to the router's IP Address as the DHCP would be issuing that also.

>Hi all
>
>I would like to configure an internal TCP/IP LAN (currently has Obtain an IP address automatically) to use fixed IP addresses, in hope that it would not clash with the ADSL (PPP on Ethernet Protocol) connection LAN card which also has Obtain an IP address automatically for it's TCP/IP Properties.
>
>Please advise.