■ Push to talk
Push to talk (PTT) (network service) is a real-time voice over IP service (network
service) available over a GSM/GPRS network. Push to talk provides direct voice
communication connected with the push of a key.
Before you can use the push to talk service, you must define the push to talk
access point and push to talk settings. You may receive the settings in a
configuration message from the push to talk service provider.
In push to talk communication, one person talks while the others listen from the
built-in loudspeaker. Speakers take turns responding to each other. Because only
one group member can talk at any time, the maximum duration of a speech turn is
limited.
Phone calls always take priority over push to talk calls.
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Besides the packet data counters, the phone registers only one-to-one calls in the
recent calls lists in Log. The participants should confirm the reception of any
communications where appropriate as there is no other confirmation of whether
the recipients have heard the call.
To check availability and costs, and to subscribe to the service, contact your
network operator or service provider. Note that roaming services may be more
limited than home network services.
While connected to the push to talk service, you can use the other functions of the
phone. Many of the services available for traditional voice calls (for example, voice
mailbox) are not available for push to talk communications.