Linksys WIP300 User Manual page 17

Wireless-G IP Phone
9. If you need to change a setting that does not appear on the Edit screen, scroll to Advanced, then press the Select Soft Key to enter the Advanced menu.
10. Highlight each setting your service provider requires you to change, then press the Select Soft Key to change the setting.
When you are finished changing the setting, press the Navigation button to save your changes.
11. When you are finished making changes in the advanced settings menu, press the Back Soft Key until you return to the Profile menu.
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Chapter 3: Installing and Using the Wireless-G IP Phone
Setting up the Wireless-G IP Phone