4 ContentsUsing the radio in different repeater areas ..................... 61Scanning a group of channels........................................ 625 Operating in trunked mode .................................69Checking that your network is available ......................... 70Changing your network .................................................. 70Making a preset call ....................................................... 71About trunked zones and workgroups............................ 73About emergency operation ........................................... 76Dialing a PABX number.................................................. 78Dialing a PSTN number.................................................. 78Receiving a call .............................................................. 79Re-establishing a call ..................................................... 80Checking the queue ....................................................... 81About status messages .................................................. 83About trunked text messages......................................... 85Placing the radio in do-not-disturb mode........................ 88Calls to conventional channels or conventional groups . 896 Dialing calls in trunked mode .............................90MPT 1343 dialing ........................................................... 91Nokia ANN fleet calls...................................................... 93Accessing common trunking functions ........................... 957 GPS location services ..........................................97About GPS location information ..................................... 98About GPS status information ........................................ 98Viewing GPS information ............................................... 998 Loneworker monitoring .....................................100Activating loneworker monitoring ................................. 100Responding to a loneworker alarm............................... 1019 Encryption ...........................................................102About encryption .......................................................... 103Encrypting calls ............................................................ 103Making an encrypted call.............................................. 104Receiving an encrypted call ......................................... 104Removing encryption keys from the radio .................... 10510 Customizing radio settings ...............................106Changing the volume of all audible indicators.............. 107Changing the volume of keypress tones ...................... 107Changing to quiet operation ......................................... 108Changing to silent operation......................................... 108Changing the external alert option ............................... 109Turning on backlighting ................................................ 109Adjusting the display contrast....................................... 111