Nokia E51

Page 81
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To change the connection speed for GPRS packet data
connections, select 
Options
 > 
Settings
 > 
GPRS
connection bitrate
.
To change the connection speed for 3G packet data
connections, select 
Options
 > 
Settings
 > 
3G
connection bitrate
.
To change the connection speed for WLAN connections,
select 
Options
 > 
Settings
 > 
Wi-Fi connection
bitrate
.
The quality of the radio broadcast depends on the selected
connection speed. The higher the speed, the better the
quality. To avoid buffering, use the highest quality only
with high speed connections.
Push to talk
Select 
Menu
 > 
Connectivity
 > 
PTT
.
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.
PTT settings
Select 
Options
 > 
Settings
 and select 
User settings
 to
define your preferences for PTT, or 
Connection settings
to change the connection details. Contact your service
provider for the correct settings.
Tip: You may also receive the settings in a message
from the provider of the PTT service.
Log in to PTT service
If you have set 
Application start-up
 on in 
User
settings
, PTT automatically logs in to the service when
started. If not, you must log in manually.
To log in to the PTT service manually, select 
Options
 >
Switch PTT on
.
When the 
Ringing type
 setting of your device is set to
Beep once
 or 
Silent
, or there is an ongoing phone call,
you cannot make or receive PTT calls.
Make a PTT call
Warning: Do not hold the device near your ear
when the loudspeaker is in use, because the volume may
be extremely loud.
To make a PTT call, select 
Options
 > 
PTT contacts
, select
one or several contacts from the list, and press the voice
key. Remember to hold the device in front of you during
the call so you can see the display. The display informs you
when it is your turn to speak. Speak towards the
microphone, and do not cover the loudspeaker with your
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