9Copyright © 2006 Nokia. All rights reserved.Sound meter............................................................................................................................................... 9213.Push to talk .................................................................................................. 93Push to talk menu .................................................................................................................................... 94Connect to and disconnect PTT ............................................................................................................ 94Make and receive a PTT call .................................................................................................................. 95Make a dial out PTT call ...................................................................................................................... 95Make a group call ................................................................................................................................. 96Make a one-to-one call ...................................................................................................................... 96Receive a PTT call.................................................................................................................................. 97Callback requests...................................................................................................................................... 97Send a callback request ...................................................................................................................... 98Respond to a callback request .......................................................................................................... 98Save the callback request sender ..................................................................................................... 99Add a one-to-one contact..................................................................................................................... 99Create and set up groups .................................................................................................................... 100Add a group ......................................................................................................................................... 100Receive an invitation ........................................................................................................................ 101PTT settings ............................................................................................................................................. 10214.Sports.......................................................................................................... 103Compass ................................................................................................................................................... 103Calibrate the compass ...................................................................................................................... 104Set the declination ............................................................................................................................ 104Set and reset the direction.............................................................................................................. 105Stopwatch................................................................................................................................................ 105Countdown timer................................................................................................................................... 106Audio message ....................................................................................................................................... 106Thermometer........................................................................................................................................... 107