To disconnect from the PTT service, select Switch PTToff.You may assign a default function to the PTT (volumeup) key to open the channel list, the contacts list, or asingle channel or contact. See "PTT settings," p. 58.Make and receive a PTTcallWarning: Do not hold the device near your earwhen the loudspeaker is in use, because the volumemay be extremely loud.To make a channel call, a one-to-one call, or a call tomultiple recipients, you must hold the PTT (volume up)key as long as you talk. To listen to the response, releasethe PTT (volume up) key.Check the login status of your contacts in Menu > Pushto talk > Contacts list: - person available, -person unknown, - person does not want to bedisturbed, but can receive callback request, - personhas PTT switched off.This service depends on your network operator and isonly available for subscribed contacts. To subscribe acontact, select Options > Subscribe contact, or if oneor more contacts are already marked, Subscribemarked.Make a channel callTo make a call to a channel, select Channel list in thePTT menu, scroll to the desired channel, and press andhold the PTT (volume up) key.Make a one-to-one callTo start a one-to-one call, select Menu > Contacts >Names, or Menu > Push to talk > Callback inbox,Channel list, or Contacts list. Select a contact, amember, or a nickname, and press and hold the PTT(volume up) key.Make a PTT call to multiplerecipientsYou can select multiple PTT contacts from the contactlist.1. Select Menu > Push to talk > Contacts list, andmark the desired contacts.2. Press and hold the PTT (volume up) key to start thecall. The participating contacts are shown on thedisplay as soon as they join the call.3. Press and hold the PTT (volume up) key to talk tothem. Release the PTT (volume up) key to hear theresponse.4. Press the end key to terminate the call.57 Push to talk