How is the 655 connected to the 2wire modem? Using the WAN port I presume on the 655?
The 2wire has a built in router already I presume and is probably giving out a 192.168.1.# or possible a 192.168.0.# address. Or it could be conflicting with the 2wires IP address that are the same, 0.1. In this case the 655 needs to be assigned a new router IP address, something different.
It's recommended to bridge DSL modems and let the 655 handle the DSL PPPoE connection since DIR series routers have better features and work better than ISP modems for routing, however with some 2wire modems, this can't be done. However using the DMZ option on the 2wire helps:
http://forums.dlink.com/index.php?topic=49338.0If this modem has a built in router, it's best to bridge the modem. Having 2 routers on the same line can cause connection problems.
Double NATTo tell if the modem is bridged or not, look at the 655s web page, Status/Device Info/Wan Section, if there is a 192.168.0.# address in the WAN IP address field, then the modem is not bridged.
If the modem can't be bridged then see if the modem has a DMZ option and input the IP address the router gets from the modem and put that into the modems DMZ.
Sometimes if the DMZ can't be used or is not an option, or the ISP modem is going to be used has the main host router, the 655 still can't be used for a wireless AP:
Bridge Mode vs Relay vs Acess Point (AP) / Routers vs Dedicated Acess Points (AP)Resetting the 655 to factory settings will change an custom router IP address back to 192.168.0.1. You should be able to log into this address from any PC using any browser to connect. The 655 does not even have to be connected to a ISP modem to do this. Just make sure the networking on the connecting PC is set up for automatic obtain IP addressing.
Please review the articles and setup guides and let us know if you need any more help. We are here to help out.