|We have one telephone line with broadband connection and a system which is connected to a modem to use this broadband facility. Recently we have taken two static IPs over this connection for a project work.|
Assuming you mean external IP addersses provided by your ISP, you would need to plug your internet connection into a switch and then statically assign the IP's to the two PC's and plug them into the switch.
Modem >> Switch >> Client's with static IP address as provided by your ISP
Just FYI, you could connect your modem to a SOHO router and have multiple PC's connected to the internet. The client computers would be behind a firewall and you could use the NAT and DHCP on the router to assign private IP's to the computers automatically.
Typically, paying for static IP's from your ISP is a bit costly. A router would negate the need for any more than one external IP and it wouldn't even have to be static.
If you're not talking about static, external IP's as provided by your ISP, then the SOHO Router idea is still the best one. Just statically assign private IP's in the same subnet as the router's DHCP....just use IP's that are outside the DHCP scope so as to avoid duplicate IP's.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.