Nokia 3230 User Manual page 98

Closed user group
You can specify a group of people
whom you can call and who can call
you. For more information, contact
your network operator or service
provider. Select: Default
the default group agreed on with the
network operator,
use another group (you need to
know the group index number), or
Off.
When security features that restrict
calls are in use (such as call barring,
closed user group and fixed dialing)
calls still may be possible to the
official emergency number
programmed into your device.
Confirm SIM services
service) - To set the phone to display
confirmation messages when you
are using a SIM card service.
Certificate management
Options in the certificate
management main view are:
Certificate details, Delete,
settings, Mark/Unmark, Help, and
Exit.
In the certificate management main
view, you can see a list of authority
certificates that have been stored in
your phone. Move the joystick to the
right to see a list of personal
certificates, if available.
(network service) -
to activate
On if you want to
(network
Trust
Copyright © 2005 Nokia. All rights reserved.
P e r s o n a l i s i n g y o u r p h o n e
Authority certificates are used by
some browser services, such as
banking services, for checking
signatures or server certificates or
other authority certificates.
Server certificates are used to
improve security in the connection
between the phone and the gateway.
The phone receives the server
certificate from the service provider
before the connection is established
and its validity is checked using the
authority certificates saved in the
phone. Server certificates are not
saved.
Server certificates may be needed
when you, for example:
• want to connect to an online
bank or another site or remote
server for actions that involve
transferring confidential
information, or
• want to be sure of the
authenticity of software when
downloading and installing
software.
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