Nokia N91 - Manual (Page 70)

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Tip! Remember to hold the device in front of you
during a push-to-talk call so you can see the display.
Speak towards the microphone, and do not cover
the loudspeaker with your hands.
Answer a one-to-one call
Press to start a one-to-one call or to dismiss
the call.
Tip! You can make a one-to-one or group call
also from Contacts. Select
Options > Talk 1 to 1
or Make PTT group call .
Make a group call
To call a group, select Options > PTT contacts , select
Options > Make PTT group call , mark the contacts
you want to call, and press .
Subscribe login status of others
To subscribe or unsubscribe to the push-to-talk login
status of others, select
Options > PTT contacts , select
the contact, select Options > Show login status or Hide
login status .
Send a callback request
In PTT contacts , scroll to the desired name, and select
Options > Send callback request .
Respond to a callback request
When someone sends you a callback request, 1 new
callback request is displayed in standby mode. Press
Show to open Callback inbox . Select a contact and
select Options > Talk 1 to 1 to start a one-to-one call.
Channels
You can join public preconfigured channels. Public
channels are open to anyone who knows the URL for
the channel.
When you are connected to a channel and talk, all
members joined to the channel hear you talking. Up to five
channels can be active at the same time. When more than
one channel is active, use
Swap to change the channel you
want to talk to.
Select Options > PTT channels .
To connect to a public preconfigured channel for the first
time, select
Options > New channel > Add existing .
When you join a preconfigured channel, you must fill
in an URL for the channel.
Create your own channels
To create a new preconfigured channel select Options >
New channel > Create new .
You can create your own public channels, choose your own
channel name, and invite members. Those members can
invite more members to the public channel.