Symbian3/SDK/Source/GUID-3490A064-8421-4ABB-9E93-99A5565CF4D7.dita
author Dominic Pinkman <dominic.pinkman@nokia.com>
Fri, 11 Jun 2010 12:39:03 +0100
changeset 8 ae94777fff8f
child 13 48780e181b38
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Week 23 contribution of SDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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<?xml version="1.0" encoding="utf-8"?>
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<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->
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<!-- This component and the accompanying materials are made available under the terms of the License 
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"Eclipse Public License v1.0" which accompanies this distribution, 
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and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->
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<!-- Initial Contributors:
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    Nokia Corporation - initial contribution.
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Contributors: 
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-->
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<!DOCTYPE task
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  PUBLIC "-//OASIS//DTD DITA Task//EN" "task.dtd">
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<task id="GUID-3490A064-8421-4ABB-9E93-99A5565CF4D7" xml:lang="en"><title>Additional
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Connection Preferences</title><shortdesc>Extended Connection Preferences API allows applications to set
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a few additional preferences that customize the connection establishment.
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These preferences, when used with specific SNAP ID, SNAP Type , IAP or connection
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selection dialog enable the applications to have more control on the connection.</shortdesc><prolog><metadata><keywords/></metadata></prolog><taskbody>
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<context id="GUID-9A074511-667D-43E5-80D8-3FDAE3321E09"><p>The additional
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connection preferences that can be set using the Extended Connection
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Preferences API are listed below. One or more of the preferences can be set
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based on connection establishment requirements. For more details on the restrictions
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regarding the preferences that can be used jointly, refer <xref href="GUID-B78E8AC0-CDC8-3DEC-AF3C-98C8994DA34A.dita"><apiname> TExtendedConnPref </apiname></xref> .</p></context>
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<steps-unordered id="GUID-4DD07DEC-6017-4237-BE46-1D69E5FBD744-GENID-1-10-1-14-1-1-4-1-1-5-1-1-7-1-3-2">
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<step id="GUID-81D0BBB7-82EA-46B5-98A6-1BD426777AA5"><cmd><b>Define Bearer
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Filtering</b></cmd>
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<info><p>Extended Connection Preferences API allows the application to limit
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the used bearers.</p><p>In the below example, only WLAN bearer is allowed.</p><codeblock xml:space="preserve">preferences.SetBearerSet( TExtendedConnPref::EExtendedConnBearerWLAN );
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</codeblock></info>
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</step>
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<step id="GUID-E819B95A-90D2-4E80-89B5-3A3EAF1BCBDB"><cmd><b>Disallow Automatic
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Bearer Switching</b></cmd>
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<info><p>The established connection can be broken by the middleware when a
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better connection is available. For example, when a known WLAN IAP is available,
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the established 3G connection is disconnected. This is also known as Forced
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Roaming. Forced Roaming is enabled by default.</p><p> The sudden disconnection
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can be disabled by the applications prior to connection establishment. </p><codeblock xml:space="preserve">preferences.SetForcedRoaming( EFalse );</codeblock><p>Forced
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roaming applies only on connections made to the Internet SNAP.</p></info>
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</step>
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<step id="GUID-85E14D5A-4F68-49E9-9DBB-1E52EFA09289"><cmd><b>Inform middleware
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that application handles contention</b> </cmd>
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<info><p>When there are multiple active connections and there is a requirement
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for a new connection , the list of active connections are displayed and the
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user selects the connection to be disconnected. This accommodates the new
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connection request to be processed. </p><p>If the Disconnect dialog is disabled,
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the contention situation is not exposed to the user and the application handles
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 the contention by itself.</p><codeblock xml:space="preserve">preferences.SetDisconnectDialog( EFalse );</codeblock></info>
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</step>
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<step id="GUID-0C8D3720-047B-4449-9645-6788ED6E0BE8"><cmd><b>Disable connecting
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soft notes and Queries</b></cmd>
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<info><p>During connection establishment , pop-ups(soft notes) indicate the
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state of the connection providing visibility and cost awareness to the user.
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The application can disable these soft notes using the Extended Connection
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Preferences API. </p><p>The application can start a connection and roam between
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different bearers without any notes about connection state shown to the user.</p><codeblock xml:space="preserve">preferences.SetNoteBehaviour( TExtendedConnPref::ENoteBehaviourConnDisableNotes );</codeblock><p>The application can start a connection and roam between different bearers
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without displaying any queries to the user but inform the user on the events
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with dialogs or notes. The user is able to see the notes about connection
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state. Queries that need user confirmation are not exposed to the user.</p><codeblock xml:space="preserve">preferences.SetNoteBehaviour( TExtendedConnPref::ENoteBehaviourConnDisableQueries ); 
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</codeblock><p>The application can start a connection and roam between different
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bearers without any queries, dialogs or notes. The connection state details
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are not exposed to the user.</p><codeblock xml:space="preserve">preferences.SetNoteBehaviour( TExtendedConnPref::ENoteBehaviourConnSilent );</codeblock></info>
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</step>
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</steps-unordered>
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</taskbody></task>