From Forum Nokia Wiki

ID	TSS000713	Creation date	July 4, 2007
Platform	S60 3rd Edition S60 3rd Edition, FP1	Devices
Category	Symbian C++	Subcategory	Networking, Telephony

Keywords (APIs, classes, methods, functions):

Overview

Creating video and VoIP calls

Description

It is possible to initiate video and Internet telephony (VoIP) calls with the AIW Service Handler API, included in the Extensions plug-in package for S60 3rd Edition SDKs.
Video call
The following example code demonstrates how to initiate a video call.
    MakeAiwCallL( _L("+3581234567"), _L("Firstname Lastname"), EAiwVideo);
    // EAiwForcedVideo doesn’t show dialogs
    // MakeAiwCallL( _L("+3581234567"), _L("Firstname Lastname"), EAiwForcedVideo);
    void MakeAiwCallL( const TDesC& aNumber, const TDesC& aName, TAiwCallType aCallType )
        {
        // Create AIW service handler
        CAiwServiceHandler* serviceHandler = CAiwServiceHandler::NewLC();
        // Create AIW interest
        RCriteriaArray interest;
        CleanupClosePushL( interest );
        CAiwCriteriaItem* criteria =
            CAiwCriteriaItem::NewLC( KAiwCmdCall, KAiwCmdCall, _L8( "*" ) );       
        const TUid KUidAiwBase = { KAiwClassBase };
        criteria->SetServiceClass( KUidAiwBase );
        User::LeaveIfError( interest.Append( criteria ) );
        // Attach to AIW interest
        serviceHandler->AttachL( interest );
        // Create AIW param package
        TAiwDialDataV1 data;
        TAiwDialDataV1Pckg dataPckg( data );
        iNameBuffer = aName.Left( iNameBuffer.MaxLength() );
        data.SetName( iNameBuffer );
        iTelNumber = aNumber.Left( iTelNumber.MaxLength() );
        data.SetTelephoneNumber( iTelNumber );
        data.SetCallType( aCallType );
        data.SetWindowGroup( CCoeEnv::Static()->RootWin().Identifier() );       
        CAiwGenericParamList& paramList = serviceHandler->InParamListL();
        TPtrC8 ptr;
        ptr.Set( dataPckg );
        TAiwVariant variant( ptr );
        TAiwGenericParam param( EGenericParamCallDialDataV1, variant );
        paramList.AppendL( param );
        // Execute AIW command
        serviceHandler->ExecuteServiceCmdL( KAiwCmdCall,
                                            paramList,
                                            serviceHandler->OutParamListL() );
        // destroy criteria, interest, and serviceHandler
        CleanupStack::PopAndDestroy( 3 );
        }   
VoIP call
Using the above function, it is possible to initiate a VoIP call as follows:
    MakeAiwCallL( _L("user@sip.server.com"),
                  _L("Firstname Lastname"),
                  EAiwVoIPCall );

See also

Extensions plug-in package for S60 3rd Edition SDK for Symbian OS, for C++, Maintenance Release
Extensions plug-in package for S60 3rd Edition SDK for Symbian OS, for C++, supporting Feature Pack 1