This Forum Beta is ONLY for registered owners of D-Link products in the USA for which we have created boards at this time.
Setting > Network SettingOnce there you need to view the page without a style to see the "WAN Port Mode" option.In IE just select View > style > no style from the menu bar.
Review the Turning a Router into an AP over on the DGL-4500 forum for the info, however yes, you can use the 655 on the same network, ssid, just use different channels and dont connect it using the WAN port, use the KAN port in back.