Connecting to your ISP using static IP addressing is much like setting up dynamic IP. You start by logging into your router as shown in the last section. However, you set the opposite radio buttons; namely click on the Use Static IP Address radio button (also called "fixed" or "manual" IP addressing) and Use These DNS Servers radio button as shown below. (Again, the name on your router may be different. You're looking for a way that lets you manually type IP addresses into the four small text boxes like the ones shown.)
For my example network, I am making believe that my ISP assigned me the static IP address of 192.168.3.52. You would substitute the IP address that your ISP has assigned to you, and enter it into the IP address line. Each part of the IP address goes into a separate text box. (This is just like we did for assigning the internal LAN IP address.) The subnet mask is often set to 255.255.255.0, however, your ISP may give you another value. If so, enter that instead into the IP Subnet Mask line. Your ISP will also tell you what your gateway address is. For my example network, it is 192.168.3.1, which is actually the LAN IP address on my real internal LAN. Substitute yours in those boxes. Finally, enter the DNS server IP addresses given to you by your ISP. (ISPs often don't give these addresses to dynamic IP address customers as the DHCP response from your ISP's DHCP server will include that information. However, status IP address customers need to know that information, so if your ISP failed to give it to your, now's the time to see how good their technical support line is. Press the Apply button to make the new settings active.
If all has gone well, you should now have connectivity to the Internet. One easy way to test this is to use a web browser to browse to a web site that's almost guaranteed to be up. From one of the PCs on your LAN, try one of these web sites: http://www.google.com and/or http://www.ebay.com. If you are not able to reach either of those sites, you may need to do a little troubleshooting on your LAN to WAN connection; see Test 5: The Handy-Dandy LAN Ping Test and Test 7: Testing for DNS Functionality. Repeat this test on the other PCs on your LAN (and other devices such as an Xbox [if possible]).