55Section 4Cell PhoneReferenceKeep in mind when sending DTMF tones for PIN’sthat the NavTalk Pilot is essentially a radio, and its signalscan be monitored by radio receivers set to the samefrequency. Considering the possibility, you may want torestrict the use of bank account PIN’s, and credit cardnumbers as a security measure.Using Prefix Dialing:Prefix dialing allows you to insert an area code orlong distance service number prefix in front of a phonenumber selected from the PhoneBook. This is helpfulwhen you are outside your home cell or area code andwant to dial a number from your PhoneBook, Speed Dial,Last Dialed, and Missed Calls pages.To use Prefix Dialing:1. Access any dialing related page and press MENU.2. Cursor down to ‘Use Prefix Dial’ and press ENTER.The ‘Enter Prefix’ window will appear.3. Press ENTER, then use the phone keypad to enterthe dialing prefix. When finished, press ENTER toreturn to the PhoneBook Page.4. Select the name from the Phonebook, or other pagethat lists numbers, that you wish to dial and pressSEND. The prefix will be displayed on the CellularStatus display along with the number just selected.Prefix Dialing is a one time per call feature and theprefix dialing string is erased after the call has beenplaced.Using Hook FlashHook Flash is used to access enhanced callingfeatures which are offered by some cellular providers,such as Call Waiting and Conference Calling. During acall, pressing the SEND key performs a hook flash. Forspecific operation, contact your cellular provider.Dialed Numbershowing the prefixThe PhoneBook Pop-upMenu with ‘Use PrefixDial’ highlightedEnter the prefixnumber string
