Netopia R3100-U User Reference Manual page 254

D-4 User's Reference Guide
Remote WAN IP address information to obtain
The telephone number of the ISP's local or nearby dial-up POP (point-of-presence).
Remote IP address of router at ISP or other remote site
Remote IP subnet mask address of router at ISP or other remote site
PPP authentication type for router at the ISP, such as PAP.
Send User Login name and Send User Password if PAP or CHAP security authentication is used
Note: If you are not using Network Address Translation, you will need to obtain all of the Remote WAN IP
address information from your ISP.