15. Push to talk
Push to talk (PTT) over cellular is a two-way radio service
available over a GSM/GPRS cellular network (network service). PTT
provides direct voice communication. To connect, press and hold the
volume up (PTT) 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
person or group you are calling does not have to answer the phone. The
participants should confirm the reception of any communications where
appropriate, as there is no other confirmation whether the recipients
have heard the call.
To check availability and costs, and to subscribe to the service, contact
your service provider. Roaming services may 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. 80.
While you are connected to the PTT service, you can use the other
functions of the phone. The PTT over cellular service is not connected to
traditional voice communication, and therefore many of the services
available for traditional voice calls (for example, voice mailbox) are not
available for PTT over cellular communications.