Palm IIIc - Manual (Page 182)

Page 174 Setting Preferences for Your Organizer
7. Enter the initialization string supplied by the documentation for
the modem attached to your cell phone.
8. Tap OK, and then tap OK again to save the configuration.
After you create the configuration, you need to set up the HotSync
Manager of your Desktop application and the HotSync application of
your organizer to perform a modem HotSync operation.
Your new configuration appears in
the list of available configurations