Push to talk
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PTT
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Push to talk (PTT) (network service) provides direct voice
communication connected with the push of a key. With
PTT, you can use your device as a walkie-talkie.
You can use PTT to have a conversation with one person
or with a group of people, or join a channel. A channel is
like a chat room: you can call the channel to see if anyone
is online. The channel call does not alert the other users;
the users just join the channel and start speaking with
each other.
In PTT communication, one person talks while the other
users listen through the built-in loudspeaker. Users take
turns responding to each other. Because only one user can
talk at a time, the maximum duration of a speech turn is
limited. For details of the speech turn duration for your
network, contact your service provider.