Hi.... maybe this information can help you:
1)- Close switch 4 on the rear panel (mini-switches).
2)- Turn on the modem.
3)- Push "Return", and then push the button "|>" until you find the option "Reinit memory".
4)- Press "Enter". You will see a message which says: "Reinit all memory?". Press "Enter" again.
Note: When you reinit the memory, you will lose the whole information that you saved in the memory, and will reset to factory default settings.
That's all.