P u s h t o t a l k76 Copyright © 2006 Nokia. All rights reserved.12. Push to talkPush to talk (PTT) over cellular is atwo-way radio service availableover a GSM/GPRS cellular network(network service). PTT providesdirect voice communication. Toconnect, press the volume up key.You can use PTT to have aconversation with one person orwith a group of people havingcompatible devices. When yourcall is connected, the people youare calling do not have to answerthe phone. The participants shouldconfirm the reception of anycommunication whereappropriate, as there is no otherconfirmation whether therecipients have heard the call.To check availability and costs,and to subscribe to the service,contact your service provider.Roaming services may be morelimited than for normal calls.Before you can use the PTT service,you must define the required PTTservice settings. See “PTT settings”p. 80.While you are connected to thePTT service, you can use the otherfunctions of the phone. The PTTservice is not connected totraditional voice communication;therefore many of the servicesavailable for traditional voice calls(for example, voice mailbox) arenot available for PTTcommunication.■ Connect anddisconnectTo connect to the PTT service,select Menu > Push to talk >Switch PTT on. indicates the PTTconnection. indicates that theservice is temporarily unavailable.The phone automatically tries toreconnect to the service until youdisconnect from the PTT service. Ifyou have added channels to thephone, you are automaticallyjoined to the active channels.To disconnect from the PTT service,select Switch PTT off.■ Make and receive aPTT callSet the phone to use theloudspeaker or earpiece for PTTcommunication. When the