88Copyright © 2006 Nokia. All rights reserved.13. Push to talkPush to talk (PTT) over cellular is a two-way radio service available over a GSM/GPRS cellularnetwork (network service). PTT provides direct voice communication. To connect, press the volume up key.You can use PTT to have a conversation with one person or with a group of people having compatible devices.When your call is connected, the people you are calling do not have to answer the phone. The participantsshould confirm the reception of any communication where appropriate, as there is no other confirmationwhether the recipients have heard the call.To check availability and costs, and to subscribe to the service, contact your service provider. Roaming servicesmay be more limited than for normal calls.Before you can use the PTT service, you must define the required PTT service settings. See PTT settings p. 93.While you are connected to the PTT service, you can use the other functions of the phone. The PTT service is notconnected to traditional voice communication; therefore many of the services available for traditional voicecalls (for example, voice mailbox) are not available for PTT communication.■ Connect and disconnectTo connect to the PTT service, select Menu > Push to talk > Switch PTT on. indicates the PTT connection.indicates that the service is temporarily unavailable. The phone automatically tries to reconnect to the serviceuntil you disconnect from the PTT service. If you have added channels to the phone, you are automaticallyjoined to the active channels, and the name of the default channel is displayed in the standby mode.To disconnect from the PTT service, select Switch PTT off.■ Make and receive a PTT callSet the phone to use the loudspeaker or earpiece for PTT communication. When the earpiece is selected, usethe phone normally by holding it to your ear.