Here is a list of all struct and union fields with links to the structures/unions they belong to:

### - f -

- FacilityIE : Q931
- FacilityMsg : Q931
- FacilityNotImplemented : IAX2IeCauseCode
- FacilityNotSubscribed : IAX2IeCauseCode
- FacilityRejected : IAX2IeCauseCode , Q931
- Factory : OpalRecordManager
- failed : RTP_Session
- Failure : IAX2IeCauseCode
- Failure_AddressIncomplete : SIP_PDU
- Failure_Ambiguous : SIP_PDU
- Failure_BadEvent : SIP_PDU
- Failure_BadExtension : SIP_PDU
- Failure_BadGateway : SIP_PDU
- Failure_BadRequest : SIP_PDU
- Failure_BusyHere : SIP_PDU
- Failure_Conflict : SIP_PDU
- Failure_ExtensionRequired : SIP_PDU
- Failure_Forbidden : SIP_PDU
- Failure_Gone : SIP_PDU
- Failure_InternalServerError : SIP_PDU
- Failure_IntervalTooBrief : SIP_PDU
- Failure_LengthRequired : SIP_PDU
- Failure_LoopDetected : SIP_PDU
- Failure_MessageTooLarge : SIP_PDU
- Failure_MethodNotAllowed : SIP_PDU
- Failure_NotAcceptable : SIP_PDU
- Failure_NotAcceptableHere : SIP_PDU
- Failure_NotFound : SIP_PDU
- Failure_NotImplemented : SIP_PDU
- Failure_PaymentRequired : SIP_PDU
- Failure_ProxyAuthenticationRequired : SIP_PDU
- Failure_RequestEntityTooLarge : SIP_PDU
- Failure_RequestPending : SIP_PDU
- Failure_RequestTerminated : SIP_PDU
- Failure_RequestTimeout : SIP_PDU
- Failure_RequestURITooLong : SIP_PDU
- Failure_ServerTimeout : SIP_PDU
- Failure_ServiceUnavailable : SIP_PDU
- Failure_SIPVersionNotSupported : SIP_PDU
- Failure_TemporarilyUnavailable : SIP_PDU
- Failure_TooManyHops : SIP_PDU
- Failure_TransactionDoesNotExist : SIP_PDU
- Failure_UnAuthorised : SIP_PDU
- Failure_Undecipherable : SIP_PDU
- Failure_UnsupportedMediaType : SIP_PDU
- Failure_UnsupportedURIScheme : SIP_PDU
- FalklandIslands : OpalLineInterfaceDevice
- fastResponseRequired : H323Transaction
- FastStartAcknowledged : H323Connection
- fastStartChannels : H323Connection
- FastStartDisabled : H323Connection
- FastStartInitiate : H323Connection
- fastStartMediaStream : H323Connection
- FastStartOptionDisable : OpalConnection
- FastStartOptionEnable : OpalConnection
- FastStartOptionMask : OpalConnection
- FastStartResponse : H323Connection
- fastStartState : H323Connection
- FastStartStates : H323Connection
- Fax() : OpalMediaStatistics::Fax , OpalMediaType
- FaxCompression : OpalMediaStatistics
- FaxCompressionT4_1d : OpalMediaStatistics
- FaxCompressionT4_2d : OpalMediaStatistics
- FaxCompressionT6 : OpalMediaStatistics
- FaxCompressionUnknown : OpalMediaStatistics
- FaxErrorBase : OpalMediaStatistics
- FaxInProgress : OpalMediaStatistics
- FaxMessageWaiting : OpalManager
- FaxNotStarted : OpalMediaStatistics
- FaxSuccessful : OpalMediaStatistics
- fci : RTP_ControlFrame::FbFIR , RTP_ControlFrame::FbTSTO
- FeatureBase : H460_Feature
- FeatureBaseAll : H460_Feature
- FeatureBaseRas : H460_Feature
- FeatureBaseSignal : H460_Feature
- FeatureCategory : H460_Feature
- FeatureDesired : H460_Feature
- FeatureInstance : H460_Feature
- FeatureNeeded : H460_Feature
- FeatureRas : H460_Feature
- features : H323Connection , H323EndPoint , H323Gatekeeper
- Features : H460_FeatureSet
- FeatureSetDisable() : H323EndPoint
- FeatureSetDisabled() : H323EndPoint
- FeatureSignal : H460_Feature
- FeatureSupported : H460_Feature
- Fiji : OpalLineInterfaceDevice
- file : OpalFileMediaStream
- Filter() : OpalMediaPatch::Filter
- FilterFrame() : OpalMediaPatch
- FilterNotifier : RTP_Session
- filters : OpalMediaPatch
- finalFrames : OpalMediaPatch::Sink
- Finalise() : H235Authenticator
- FindBy() : SIPHandlersList
- FindCall() : H323GatekeeperServer
- FindCallWithLock() : OpalManager
- FindCapability() : H323Capabilities , H323EndPoint
- FindChannel() : H245NegLogicalChannels , H323Connection
- FindChannelBySession() : H245NegLogicalChannels
- FindConnectionWithLock() : H323EndPoint
- FindContextByIdWithLock() : OpalIMManager
- FindContextByNamesWithLock() : OpalIMManager
- FindContextForMessageWithLock() : OpalIMManager
- FindDestinationEndPoint() : H323GatekeeperServer
- FindEndPoint() : OpalManager
- FindEndPointByAliasAddress() : H323GatekeeperServer
- FindEndPointByAliasString() : H323GatekeeperServer
- FindEndPointByIdentifier() : H323GatekeeperServer
- FindEndPointByPartialAlias() : H323GatekeeperServer
- FindEndPointByPrefixString() : H323GatekeeperServer
- FindEndPointBySignalAddress() : H323GatekeeperServer
- FindEndPointBySignalAddresses() : H323GatekeeperServer
- FindFormat() : OpalMediaFormatList , SDPMediaDescription
- FindIntermediateFormat() : OpalTranscoder
- FindListener() : OpalEndPoint
- FindListenerForProtocol() : OpalEndPoint
- FindNegLogicalChannel() : H245NegLogicalChannels
- FindNode() : OpalMixerEndPoint , OpalMixerNodeManager
- FindOption() : OpalMediaFormat , OpalMediaFormatInternal
- FindOptionAs() : OpalMediaFormat
- FindSIPHandlerByAuthRealm() : SIPHandlersList
- FindSIPHandlerByCallID() : SIPHandlersList
- FindSIPHandlerByDomain() : SIPHandlersList
- FindSIPHandlerByUrl() : SIPHandlersList
- FinishOutputFrame() : OpalRFC4175Encoder
- Finland : OpalLineInterfaceDevice
- firmwareVer : IAX2IeData
- FirstEvent : SIPDialogNotification
- firstMediaFrame : IAX2CallProcessor
- firstOctet : H281VideoSource
- firstPacketReceived : RTP_Session
- firstPacketSent : RTP_Session
- FirstState : SIPDialogNotification
- FixedSilenceDetection : OpalSilenceDetector
- flags : PluginCodec_GetCodecFunction
- Flash : OpalRFC2833Info
- flashhook : IAX2FullFrameSessionControl
- Flush() : OpalBitRateCalculator
- FlushData() : RTP_Session , RTP_UDP
- fnName : OpalPluginControl
- FocusDirection : H281_Frame
- FocusIn : H281_Frame
- FocusOut : H281_Frame
- Forbidden : OpalPresenceInfo
- ForceIFrame() : OpalVideoTranscoder
- forceIFrame : OpalVideoTranscoder
- forceIsTransportable : OpalMediaFormatInternal
- forkedInvitations : SIPConnection
- format : IAX2IeData
- formatName : OpalMediaFormatInternal
- formats : SDPMediaDescription
- ForwardCall() : H323Connection , IAX2Connection , OpalConnection , SIPConnection
- ForwardConnection() : H323EndPoint , SIPEndPoint
- ForwardingPhase : OpalConnection
- fraction : RTP_ControlFrame::ReceiverReport
- fractionLost : RTP_Session::ReceiverReport
- FrameHeader : OpalVideoTranscoder
- FrameHeightOption() : OpalVideoFormat
- FrameIncrementsInSeqNo() : IAX2FullFrame
- frameList : IAX2Processor
- FrameMap : OpalJitterBuffer
- FrameTimeOption() : OpalMediaFormat
- frameType : IAX2Frame
- FrameWidthOption() : OpalVideoFormat
- France : OpalLineInterfaceDevice
- FreeOptions() : PluginCodec< NAME >
- freeOptionsControl : OpalPluginMediaFormatInternal
- FrenchPolynesia : OpalLineInterfaceDevice
- FrenchSouthernAndAntarcticLands : OpalLineInterfaceDevice
- fromDestination : Q931
- fromNetworkFrames : IAX2Receiver
- fromRemote : H323ChannelNumber
- FromSIPActivityString() : SIPPresenceInfo
- FromString() : OpalMediaOption , OpalPresenceInfo , SIPDialogContext , SIPURLList
- FromURI : SIPURL
- FS1016 : RTP_DataFrame
- FullTSAP : OpalTransportAddress
- fwBlockData : IAX2IeData
- fwBlockDesc : IAX2IeData