Siemens CL-110-I - Manual (Page 66)

7. Check the network information. Make sure the settings match the settings provided by ISP.
Click Finish.
8. Set TCP/IP for your computer. Specify an IP Address, subnet mask and set default gateway. eg:
IP Address: 10.3.75.51
Subnet Mask: 255.255.255.248
Gateway: 10.3.75.49
9. Now the router is well configured. You can access into Internet.