Sorry if I'm in the wrong section, I cannot find the "message Board" for my DSL

.
I am currently using a Zoom X5 on a static IP address line coupled to my DIR-655 for wireless. I would like to use my new DSL-2540B instead of the X5. Sometimes I change the cable to hook directly into the X5 so I know how to re-configure Vista for this setup.
I cannot see in the 2540B setup menus where to input the LAN IP, mask, and gateway addresses nor the WAN IP, mask or gateway. My 'encapsulzation' on the Zoom reads: 1483 Bridged IP LLC, and the VPI/VCI = 1/50. Are there other parameters I should set?
The manual and other docs are vague on this config. Can you help me out, I'm sure I'm not the first person to do this.
Gracias