MULTIMEDIA-SYSTEM-CONTROL DEFINITIONS AUTOMATIC TAGS ::=
BEGIN

-- Export all symbols

-- ===================================================================================
-- Top level Messages
-- ===================================================================================

MultimediaSystemControlMessage	::=CHOICE
{
	request	RequestMessage,
	response	ResponseMessage,
	command	CommandMessage,
	indication	IndicationMessage,
	...
}

-- A RequestMessage results in action and requires an immediate response

RequestMessage	::=CHOICE
{
	nonStandard	NonStandardMessage,

	masterSlaveDetermination	MasterSlaveDetermination,

	terminalCapabilitySet	TerminalCapabilitySet,

	openLogicalChannel	OpenLogicalChannel,
	closeLogicalChannel	CloseLogicalChannel,

	requestChannelClose	RequestChannelClose,

	multiplexEntrySend	MultiplexEntrySend,

	requestMultiplexEntry	RequestMultiplexEntry,

	requestMode	RequestMode,

	roundTripDelayRequest	RoundTripDelayRequest,

	maintenanceLoopRequest	MaintenanceLoopRequest,

	...
}

-- A ResponseMessage is the response to a request Message

ResponseMessage	::=CHOICE
{
	nonStandard	NonStandardMessage,

	masterSlaveDeterminationAck	MasterSlaveDeterminationAck,
	masterSlaveDeterminationReject	MasterSlaveDeterminationReject,

	terminalCapabilitySetAck	TerminalCapabilitySetAck,
	terminalCapabilitySetReject	TerminalCapabilitySetReject,

	openLogicalChannelAck	OpenLogicalChannelAck,
	openLogicalChannelReject	OpenLogicalChannelReject,
	closeLogicalChannelAck	CloseLogicalChannelAck,

	requestChannelCloseAck	RequestChannelCloseAck,
	requestChannelCloseReject	RequestChannelCloseReject,

	multiplexEntrySendAck	MultiplexEntrySendAck,
	multiplexEntrySendReject	MultiplexEntrySendReject,

	requestMultiplexEntryAck	RequestMultiplexEntryAck,
	requestMultiplexEntryReject	RequestMultiplexEntryReject,

	requestModeAck	RequestModeAck,
	requestModeReject	RequestModeReject,

	roundTripDelayResponse	RoundTripDelayResponse,

	maintenanceLoopAck	MaintenanceLoopAck,
	maintenanceLoopReject	MaintenanceLoopReject,

	...
}

-- A CommandMessage requires action, but no explicit response

CommandMessage	::=CHOICE
{
	nonStandard	NonStandardMessage,

	maintenanceLoopOffCommand	MaintenanceLoopOffCommand,

	sendTerminalCapabilitySet	SendTerminalCapabilitySet,

	encryptionCommand	EncryptionCommand,

	flowControlCommand	FlowControlCommand,

	endSessionCommand	EndSessionCommand,

	miscellaneousCommand	MiscellaneousCommand,

	...
}

-- An IndicationMessage is information that does not require action or response

IndicationMessage	::=CHOICE
{
	nonStandard	NonStandardMessage,

	functionNotSupported	FunctionNotSupported,

	masterSlaveDeterminationRelease	MasterSlaveDeterminationRelease,

	terminalCapabilitySetRelease	TerminalCapabilitySetRelease,

	openLogicalChannelConfirm	OpenLogicalChannelConfirm,

	requestChannelCloseRelease	RequestChannelCloseRelease,

	multiplexEntrySendRelease	MultiplexEntrySendRelease,

	requestMultiplexEntryRelease	RequestMultiplexEntryRelease,

	requestModeRelease	RequestModeRelease,

	miscellaneousIndication	MiscellaneousIndication,

	jitterIndication	JitterIndication,

	h223SkewIndication	H223SkewIndication,

	newATMVCIndication	NewATMVCIndication,

	userInput	UserInputIndication,
	...
}

-- SequenceNumber is defined here as it is used in a number of Messages
SequenceNumber	::=INTEGER (0..255)

-- ===================================================================================
-- Non standard Message definitions
-- ===================================================================================

NonStandardMessage	::=SEQUENCE
{
	nonStandardData	NonStandardParameter,
	...
}

NonStandardParameter	::=SEQUENCE
{
	nonStandardIdentifier	NonStandardIdentifier,
	data		OCTET STRING
}

NonStandardIdentifier	::=CHOICE
{
	object		OBJECT IDENTIFIER,
	h221NonStandard	SEQUENCE
	{
		t35CountryCode	INTEGER (0..255),	-- country, per T.35
		t35Extension	INTEGER (0..255),	-- assigned nationally
		manufacturerCode	INTEGER (0..65535)	-- assigned nationally
	}
}

-- ===================================================================================
-- Master-slave determination definitions
-- ===================================================================================

MasterSlaveDetermination	::=SEQUENCE
{
	terminalType	INTEGER (0..255),
	statusDeterminationNumber	INTEGER (0..16777215),
	...
}

MasterSlaveDeterminationAck	::=SEQUENCE
{
	decision	CHOICE
	{
		master	NULL,
		slave	NULL
	},
	...
}

MasterSlaveDeterminationReject	::=SEQUENCE
{
	cause		CHOICE
	{
		identicalNumbers	NULL,
		...
	},
	...
}

MasterSlaveDeterminationRelease	::=SEQUENCE
{
	...
}


-- ===================================================================================
-- Capability exchange definitions
-- ===================================================================================

TerminalCapabilitySet	::=SEQUENCE
{
	sequenceNumber	SequenceNumber,

	protocolIdentifier	OBJECT IDENTIFIER,
				-- shall be set to the value
				-- {itu-t (0) recommendation (0) h (8) 245 version (0) 1}

	multiplexCapability	MultiplexCapability OPTIONAL,

	capabilityTable	SET SIZE (1..256) OF CapabilityTableEntry OPTIONAL,

	capabilityDescriptors	SET SIZE (1..256) OF CapabilityDescriptor OPTIONAL,

	...
}

V75Capability	::=SEQUENCE
{
	audioHeader	BOOLEAN,
	...
}

CapabilityTableEntry	::=SEQUENCE
{
	capabilityTableEntryNumber	CapabilityTableEntryNumber,
	capability	Capability OPTIONAL
}

CapabilityDescriptor	::=SEQUENCE
{
	capabilityDescriptorNumber	CapabilityDescriptorNumber,
	simultaneousCapabilities	SET SIZE (1..256) OF AlternativeCapabilitySet OPTIONAL
}

AlternativeCapabilitySet	::=SEQUENCE SIZE (1..256) OF CapabilityTableEntryNumber

CapabilityTableEntryNumber	::=INTEGER (1..65535)

CapabilityDescriptorNumber	::=INTEGER (0..255)

TerminalCapabilitySetAck	::=SEQUENCE
{
	sequenceNumber	SequenceNumber,
	...
}

TerminalCapabilitySetReject	::=SEQUENCE
{
	sequenceNumber	SequenceNumber,
	cause		CHOICE
	{
		unspecified	NULL,
		undefinedTableEntryUsed	NULL,
		descriptorCapacityExceeded	NULL,
		tableEntryCapacityExceeded	CHOICE
		{
			highestEntryNumberProcessed	CapabilityTableEntryNumber,
			noneProcessed	NULL
		},
		...
	},
	...
}

TerminalCapabilitySetRelease	::=SEQUENCE
{
	...
}

-- ===================================================================================
-- Capability exchange definitions: top level capability description
-- ===================================================================================

Capability		::=CHOICE
{
	nonStandard	NonStandardParameter,

	receiveVideoCapability	VideoCapability,
	transmitVideoCapability	VideoCapability,
	receiveAndTransmitVideoCapability	VideoCapability,

	receiveAudioCapability	AudioCapability,
	transmitAudioCapability	AudioCapability,
	receiveAndTransmitAudioCapability	AudioCapability,

	receiveDataApplicationCapability	DataApplicationCapability,
	transmitDataApplicationCapability	DataApplicationCapability,
	receiveAndTransmitDataApplicationCapability	DataApplicationCapability,

	h233EncryptionTransmitCapability	BOOLEAN,
	h233EncryptionReceiveCapability	SEQUENCE
	{
		h233IVResponseTime	INTEGER (0..255),	-- units milliseconds	
		...
	},
	...
}

-- ===================================================================================
-- Capability exchange definitions: Multiplex capabilities
-- ===================================================================================

MultiplexCapability	::=CHOICE
{
	nonStandard	NonStandardParameter,
	h222Capability	H222Capability,
	h223Capability	H223Capability,
	v76Capability	V76Capability,
	...
}

H222Capability	::= SEQUENCE
{
	numberOfVCs	INTEGER (1..256),
	vcCapability	SET OF VCCapability,
	...
}

VCCapability	::=SEQUENCE
{
	aal1		SEQUENCE
	{
		nullClockRecovery	BOOLEAN,
		srtsClockRecovery	BOOLEAN,
		adaptiveClockRecovery	BOOLEAN,
		nullErrorCorrection	BOOLEAN,
		longInterleaver	BOOLEAN,
		shortInterleaver	BOOLEAN,
		errorCorrectionOnly	BOOLEAN,
		structuredDataTransfer	BOOLEAN,
		partiallyFilledCells	BOOLEAN,
		...
	} OPTIONAL,
	aal5		SEQUENCE
	{
		forwardMaximumSDUSize	INTEGER (0..65535),	-- units octets
		backwardMaximumSDUSize	INTEGER (0..65535),	-- units octets
		...
	} OPTIONAL,
	transportStream	BOOLEAN,
	programStream	BOOLEAN,
	availableBitRates	SEQUENCE
	{
		type	CHOICE
		{
			singleBitRate	INTEGER (1..65535),	-- units 64 kbits per second
			rangeOfBitRates	SEQUENCE
			{
				lowerBitRate	INTEGER (1..65535),	-- units 64 kbits per second
				higherBitRate	INTEGER (1..65535)	-- units 64 kbits per second
			}
		},
		...
	},
	...
}

H223Capability	::=SEQUENCE
{
	transportWithI-frames	BOOLEAN,	-- I-frame transport of H.245

	videoWithAL1	BOOLEAN,
	videoWithAL2	BOOLEAN,
	videoWithAL3	BOOLEAN,
	audioWithAL1	BOOLEAN,
	audioWithAL2	BOOLEAN,
	audioWithAL3	BOOLEAN,
	dataWithAL1	BOOLEAN,
	dataWithAL2	BOOLEAN,
	dataWithAL3	BOOLEAN,

	maximumAl2SDUSize	INTEGER (0..65535),	-- units octets
	maximumAl3SDUSize	INTEGER (0..65535),	-- units octets

	maximumDelayJitter	INTEGER (0..1023),	-- units milliseconds

	h223MultiplexTableCapability	CHOICE
	{
		basic	NULL,
		enhanced	SEQUENCE
		{
			maximumNestingDepth	INTEGER (1..15),
			maximumElementListSize	INTEGER (2..255),
			maximumSubElementListSize	INTEGER (2..255),
			...
		}
	},
	...
}

V76Capability	::=SEQUENCE
{
	suspendResumeCapabilitywAddress	BOOLEAN,
	suspendResumeCapabilitywoAddress	BOOLEAN,
	rejCapability	BOOLEAN,
	sREJCapability	BOOLEAN,
	mREJCapability	BOOLEAN,
	crc8bitCapability	BOOLEAN,
	crc16bitCapability	BOOLEAN, 
	crc32bitCapability	BOOLEAN,
	uihCapability	BOOLEAN,
	numOfDLCS	INTEGER (2..8191),
	twoOctetAddressFieldCapability	BOOLEAN,
	loopBackTestCapability	BOOLEAN,
	n401Capability	INTEGER (1..4095),
	maxWindowSizeCapability	INTEGER (1..127),
	v75Capability	V75Capability,
	...
}

-- ===================================================================================
-- Capability exchange definitions: Video capabilities
-- ===================================================================================

VideoCapability	::=CHOICE
{
	nonStandard	NonStandardParameter ,
	h261VideoCapability	H261VideoCapability,
	h262VideoCapability	H262VideoCapability,
	h263VideoCapability	H263VideoCapability,
	is11172VideoCapability	IS11172VideoCapability,
	...
}

H261VideoCapability	::=SEQUENCE
{
	qcifMPI	INTEGER (1..4) OPTIONAL,	-- units 1/29.97 Hz
	cifMPI		INTEGER (1..4) OPTIONAL,	-- units 1/29.97 Hz
	temporalSpatialTradeOffCapability	BOOLEAN,
	maxBitRate	INTEGER (1..19200),	-- units of 100 bits/s
	stillImageTransmission	BOOLEAN,	-- annex D of H.261
	...
}

H262VideoCapability	::=SEQUENCE
{
	profileAndLevel-SPatML	BOOLEAN,
	profileAndLevel-MPatLL	BOOLEAN,
	profileAndLevel-MPatML	BOOLEAN,
	profileAndLevel-MPatH-14	BOOLEAN,
	profileAndLevel-MPatHL	BOOLEAN,
	profileAndLevel-SNRatLL	BOOLEAN,
	profileAndLevel-SNRatML	BOOLEAN,
	profileAndLevel-SpatialatH-14	BOOLEAN,
	profileAndLevel-HPatML	BOOLEAN,
	profileAndLevel-HPatH-14	BOOLEAN,
	profileAndLevel-HPatHL	BOOLEAN,
	videoBitRate	INTEGER (0.. 1073741823) OPTIONAL,	-- units 400 bits/sec
	vbvBufferSize	INTEGER (0.. 262143) OPTIONAL,	-- units 16384 bits
	samplesPerLine	INTEGER (0..16383) OPTIONAL,	-- units samples/line
	linesPerFrame	INTEGER (0..16383) OPTIONAL,	-- units lines/frame
	framesPerSecond	INTEGER (0..15) OPTIONAL,	-- frame_rate_code
	luminanceSampleRate	INTEGER (0..4294967295) OPTIONAL,	-- units samples/sec
	...
}

H263VideoCapability	::=SEQUENCE
{
	sqcifMPI	INTEGER (1..32) OPTIONAL,	-- units 1/29.97 Hz
	qcifMPI	INTEGER (1..32) OPTIONAL,	-- units 1/29.97 Hz
	cifMPI		INTEGER (1..32) OPTIONAL,	-- units 1/29.97 Hz
	cif4MPI	INTEGER (1..32) OPTIONAL,	-- units 1/29.97 Hz
	cif16MPI	INTEGER (1..32) OPTIONAL,	-- units 1/29.97 Hz
	maxBitRate	INTEGER (1..192400),	-- units 100 bits/s
	unrestrictedVector	BOOLEAN,
	arithmeticCoding	BOOLEAN,
	advancedPrediction	BOOLEAN,
	pbFrames	BOOLEAN,
	temporalSpatialTradeOffCapability	BOOLEAN,
	hrd-B		INTEGER (0..524287) OPTIONAL,	-- units 128 bits
	bppMaxKb	INTEGER (0..65535) OPTIONAL,	-- units 1024 bits
	...
}

IS11172VideoCapability	::=SEQUENCE
{
	constrainedBitstream	BOOLEAN,
	videoBitRate	INTEGER (0.. 1073741823) OPTIONAL,	-- units 400 bits/sec
	vbvBufferSize	INTEGER (0.. 262143) OPTIONAL,	-- units 16384 bits
	samplesPerLine	INTEGER (0..16383) OPTIONAL,	-- units samples/line
	linesPerFrame	INTEGER (0..16383) OPTIONAL,	-- units lines/frame
	pictureRate	INTEGER (0..15) OPTIONAL,	
	luminanceSampleRate	INTEGER (0..4294967295) OPTIONAL,	-- units samples/sec
	...
}

-- ===================================================================================
-- Capability exchange definitions: Audio capabilities
-- ===================================================================================

-- For an H.222 multiplex, the integers indicate the size of the STD buffer in units of 256 octets
-- For an H.223 multiplex, the integers indicate the maximum number of audio frames per AL-SDU

AudioCapability	::=CHOICE
{
	nonStandard	NonStandardParameter,
	g711Alaw64k	INTEGER (1..256),
	g711Alaw56k	INTEGER (1..256),
	g711Ulaw64k	INTEGER (1..256),
	g711Ulaw56k	INTEGER (1..256),

	g722-64k	INTEGER (1..256),
	g722-56k	INTEGER (1..256),
	g722-48k	INTEGER (1..256),

	g7231		SEQUENCE
	{
		maxAl-sduAudioFrames	INTEGER (1..256),
		silenceSuppression	BOOLEAN
	},
					g728		INTEGER (1..256),
	g729		INTEGER (1..256),
	g729AnnexA	INTEGER (1..256),
	is11172AudioCapability	IS11172AudioCapability,
	is13818AudioCapability	IS13818AudioCapability,
	 ...
}

IS11172AudioCapability	::=SEQUENCE
{
	audioLayer1	BOOLEAN,
	audioLayer2	BOOLEAN,
	audioLayer3	BOOLEAN,

	audioSampling32k	BOOLEAN,
	audioSampling44k1	BOOLEAN,
	audioSampling48k	BOOLEAN,

	singleChannel	BOOLEAN,
	twoChannels	BOOLEAN,

	bitRate	INTEGER (1..448),	-- units kbits/sec
	...
}

IS13818AudioCapability	::=SEQUENCE
{
	audioLayer1	BOOLEAN,
	audioLayer2	BOOLEAN,
	audioLayer3	BOOLEAN,

	audioSampling16k	BOOLEAN,
	audioSampling22k05	BOOLEAN,
	audioSampling24k	BOOLEAN,
	audioSampling32k	BOOLEAN,
	audioSampling44k1	BOOLEAN,
	audioSampling48k	BOOLEAN,

	singleChannel	BOOLEAN,
	twoChannels	BOOLEAN,
	threeChannels2-1	BOOLEAN,
	threeChannels3-0	BOOLEAN,
	fourChannels2-0-2-0	BOOLEAN,
	fourChannels2-2	BOOLEAN,
	fourChannels3-1	BOOLEAN,
	fiveChannels3-0-2-0	BOOLEAN,
	fiveChannels3-2	BOOLEAN,

	lowFrequencyEnhancement	BOOLEAN,

	multilingual	BOOLEAN,

	bitRate	INTEGER (1..1130),	-- units kbits/sec
	...
}

-- ===================================================================================
-- Capability exchange definitions: Data capabilities
-- ===================================================================================

DataApplicationCapability	::=SEQUENCE
{
	application	CHOICE
	{
		nonStandard	NonStandardParameter,
		t120	DataProtocolCapability,
		dsm-cc	DataProtocolCapability,
		userData	DataProtocolCapability,
		t84	SEQUENCE
		{
			t84Protocol	DataProtocolCapability,
			t84Profile	T84Profile
		},
		t434	DataProtocolCapability,
		h224	DataProtocolCapability,
		nlpid	SEQUENCE
		{
			nlpidProtocol	DataProtocolCapability,
			nlpidData	OCTET STRING
		},
		dsvdControl	NULL,
		h222DataPartitioning	DataProtocolCapability,
		...
	},
	maxBitRate	INTEGER (0..4294967295),	-- units 100 bits/sec
	...
}

DataProtocolCapability	::=CHOICE
{
	nonStandard	NonStandardParameter,
	v14buffered	NULL,
	v42lapm	NULL,	-- may negotiate to V.42bis
	hdlcFrameTunnelling	NULL,
	h310SeparateVCStack	NULL,
	h310SingleVCStack	NULL,
	transparent	NULL,
	...
}

T84Profile		::=CHOICE
{
	t84Unrestricted	NULL,
	t84Restricted	SEQUENCE
	{
		qcif	BOOLEAN,
		cif		BOOLEAN,
		ccir601Seq	BOOLEAN,
		ccir601Prog	BOOLEAN,
		hdtvSeq	BOOLEAN,
		hdtvProg	BOOLEAN,

		g3FacsMH200x100	BOOLEAN,
		g3FacsMH200x200	BOOLEAN,
		g4FacsMMR200x100	BOOLEAN,
		g4FacsMMR200x200	BOOLEAN,
		jbig200x200Seq	BOOLEAN,
		jbig200x200Prog	BOOLEAN,
		jbig300x300Seq	BOOLEAN,
		jbig300x300Prog	BOOLEAN,

		digPhotoLow	BOOLEAN,
		digPhotoMedSeq	BOOLEAN,
		digPhotoMedProg	BOOLEAN,
		digPhotoHighSeq	BOOLEAN,
		digPhotoHighProg	BOOLEAN,

		...
	}
}


-- ===================================================================================
-- Logical channel signalling definitions
-- ===================================================================================

-- 'Forward' is used to refer to transmission in the direction from the terminal making the
-- original request for a logical channel to the other terminal, and 'reverse' is used to refer
-- to the opposite direction of transmission, in the case of a bi-directional channel request.

OpenLogicalChannel	::=SEQUENCE
{
	forwardLogicalChannelNumber	LogicalChannelNumber,

	forwardLogicalChannelParameters	SEQUENCE
	{
		portNumber	INTEGER (0..65535) OPTIONAL,
		dataType	DataType,
		multiplexParameters	CHOICE
		{
			h222LogicalChannelParameters	H222LogicalChannelParameters,
			h223LogicalChannelParameters	H223LogicalChannelParameters,
			v76LogicalChannelParameters V76LogicalChannelParameters,
			...
		},
		...
	},

	-- Used to specify the reverse channel for bi-directional open request

	reverseLogicalChannelParameters	SEQUENCE
	{
		dataType	DataType,
		multiplexParameters	CHOICE
		{
			-- H.222 parameters are never present in reverse direction
			h223LogicalChannelParameters	H223LogicalChannelParameters,
			v76LogicalChannelParameters	V76LogicalChannelParameters,
			...
		} OPTIONAL,	-- Not present for H.222
		...
	} OPTIONAL,	-- Not present for uni-directional channel request
	...
}

LogicalChannelNumber	::=INTEGER (1..65535)

V75Parameters	::= SEQUENCE
{
	audioHeaderPresent	BOOLEAN,
	 ...
}	



DataType		::=CHOICE
{
	nonStandard	NonStandardParameter,
	nullData	NULL,
	videoData	VideoCapability,	
	audioData	AudioCapability,
	data		DataApplicationCapability,
	encryptionData	EncryptionMode,
	...
}


H222LogicalChannelParameters	::=SEQUENCE
{
	resourceID	INTEGER (0..65535),
	subChannelID	INTEGER (0..8191),
	pcr-pid	INTEGER (0..8191) OPTIONAL,
	programDescriptors	OCTET STRING OPTIONAL,
	streamDescriptors	OCTET STRING OPTIONAL,
	...
}

H223LogicalChannelParameters	::=SEQUENCE
{
	adaptationLayerType	CHOICE
	{
		nonStandard	NonStandardParameter,
		al1Framed	NULL,
		al1NotFramed	NULL,
		al2WithoutSequenceNumbers	NULL,
		al2WithSequenceNumbers	NULL,
		al3		SEQUENCE
		{
			controlFieldOctets	INTEGER (0..2),
			sendBufferSize	INTEGER (0..16777215)	-- units octets
		},

		...
	},

	segmentableFlag	BOOLEAN,
	...
}	

V76LogicalChannelParameters	::=SEQUENCE
{
	hdlcParameters	V76HDLCParameters,
 	suspendResume	CHOICE
	{ 
		wAddress	NULL,
		woAddress	NULL,
		...
	},
	uIH			BOOLEAN,
	mode		CHOICE
	{
		eRM	SEQUENCE
		{
			windowSize	INTEGER (1..127) ,
			recovery	CHOICE
			{
				rej	NULL,
				sREJ	NULL,
				mSREJ	NULL,
				...
			},
			...
		},
	 	uNERM	NULL,
		...
	},
	v75Parameters	V75Parameters,
	...
}

V76HDLCParameters	::=SEQUENCE
{
	crcLength	CRCLength,
	n401		INTEGER (1..127),
	loopbackTestProcedure	BOOLEAN,
		...
}



CRCLength	::=CHOICE
{
	crc8bit		NULL,
	crc16bit	NULL,
	crc32bit	NULL,
	...
}

OpenLogicalChannelAck	::=SEQUENCE
{
	forwardLogicalChannelNumber	LogicalChannelNumber,

	reverseLogicalChannelParameters	SEQUENCE
	{
		reverseLogicalChannelNumber	LogicalChannelNumber,
		portNumber	INTEGER (0..65535) OPTIONAL,
		multiplexParameters	CHOICE
		{
			h222LogicalChannelParameters	H222LogicalChannelParameters,
			-- H.223 parameters are never present in reverse direction
			...
		} OPTIONAL,	-- Not present for H.223
		...

	} OPTIONAL,	-- Not present for uni-directional channel request
	...
}

OpenLogicalChannelReject	::=SEQUENCE
{
	forwardLogicalChannelNumber	LogicalChannelNumber,
	cause		CHOICE
	{
		unspecified	NULL,
		unsuitableReverseParameters	NULL,
		dataTypeNotSupported	NULL,
		dataTypeNotAvailable	NULL,
		unknownDataType	NULL,
		dataTypeALCombinationNotSupported	NULL,
		...
	},
	...
}

OpenLogicalChannelConfirm	::=SEQUENCE
{
	forwardLogicalChannelNumber	LogicalChannelNumber,
	...
}

CloseLogicalChannel	::=SEQUENCE
{
	forwardLogicalChannelNumber	LogicalChannelNumber,
	source		CHOICE
	{
		user	NULL,
		lcse	NULL
	},
	...
}

CloseLogicalChannelAck	::=SEQUENCE
{
	forwardLogicalChannelNumber	LogicalChannelNumber,
	...
}

RequestChannelClose	::=SEQUENCE
{
	forwardLogicalChannelNumber	LogicalChannelNumber,
	...
}

RequestChannelCloseAck	::=SEQUENCE
{
	forwardLogicalChannelNumber	LogicalChannelNumber,
	...
}

RequestChannelCloseReject	::=SEQUENCE
{
	forwardLogicalChannelNumber	LogicalChannelNumber,
	cause		CHOICE
	{
		unspecified	NULL,
		...
	},
	...
}

RequestChannelCloseRelease	::=SEQUENCE
{
	forwardLogicalChannelNumber	LogicalChannelNumber,
	...
}


-- ===================================================================================
-- H.223 multiplex table definitions
-- ===================================================================================

MultiplexEntrySend	::=SEQUENCE
{
	sequenceNumber	SequenceNumber,
	multiplexEntryDescriptors	SET SIZE (1..15) OF MultiplexEntryDescriptor,
	...
}

MultiplexEntryDescriptor	::=SEQUENCE
{
	multiplexTableEntryNumber	MultiplexTableEntryNumber,
	elementList	SEQUENCE SIZE (1..256) OF MultiplexElement OPTIONAL
}

MultiplexElement	::=SEQUENCE
{
	type		CHOICE
	{
		logicalChannelNumber	INTEGER(0..65535),
		subElementList	SEQUENCE SIZE (2..255) OF MultiplexElement
	},
	repeatCount	CHOICE
	{
		finite	INTEGER (1..65535),	-- repeats of type
		untilClosingFlag	NULL	-- used for last element 
	}
}

MultiplexTableEntryNumber	::=INTEGER (1..15)

MultiplexEntrySendAck	::=SEQUENCE
{
	sequenceNumber	SequenceNumber,
	multiplexTableEntryNumber	SET SIZE (1..15) OF MultiplexTableEntryNumber,
	...
}

MultiplexEntrySendReject	::=SEQUENCE
{
	sequenceNumber	SequenceNumber,
	rejectionDescriptions	SET SIZE (1..15) OF MultiplexEntryRejectionDescriptions,
	...
}

MultiplexEntryRejectionDescriptions	::=SEQUENCE
{
	multiplexTableEntryNumber	MultiplexTableEntryNumber,
	cause		CHOICE
	{
		unspecifiedCause	NULL,
		descriptorTooComplex	NULL,
		...
	},
	...
}

MultiplexEntrySendRelease	::=SEQUENCE
{
	multiplexTableEntryNumber	SET SIZE (1..15) OF MultiplexTableEntryNumber,
	...
}

RequestMultiplexEntry	::=SEQUENCE
{
	entryNumbers	SET SIZE (1..15) OF MultiplexTableEntryNumber,
	...
}

RequestMultiplexEntryAck	::=SEQUENCE
{
	entryNumbers	SET SIZE (1..15) OF MultiplexTableEntryNumber,
	...
}

RequestMultiplexEntryReject	::=SEQUENCE
{
	entryNumbers	SET SIZE (1..15) OF MultiplexTableEntryNumber,
	rejectionDescriptions	SET SIZE (1..15) OF RequestMultiplexEntryRejectionDescriptions,
	...
}

RequestMultiplexEntryRejectionDescriptions	::=SEQUENCE
{
	multiplexTableEntryNumber	MultiplexTableEntryNumber,
	cause		CHOICE
	{
		unspecifiedCause	NULL,
		...
	},
	...
}

RequestMultiplexEntryRelease	::=SEQUENCE
{
	entryNumbers	SET SIZE (1..15) OF MultiplexTableEntryNumber,
	...
}


-- ===================================================================================
-- Request mode definitions
-- ===================================================================================

-- RequestMode is a list, in order or preference, of modes that a terminal would like
-- to have transmitted to it.

RequestMode	::=SEQUENCE
{
	sequenceNumber	SequenceNumber,
	requestedModes	SEQUENCE SIZE (1..256) OF ModeDescription,
	...
}

RequestModeAck	::=SEQUENCE
{
	sequenceNumber	SequenceNumber,
	response	CHOICE
	{
		willTransmitMostPreferredMode	NULL,
		willTransmitLessPreferredMode	NULL,
		...
	},
	...
}

RequestModeReject	::=SEQUENCE
{
	sequenceNumber	SequenceNumber,
	cause		CHOICE
	{
		modeUnavailable	NULL,
		multipointConstraint	NULL,
		requestDenied	NULL,
		...
	},
	...
}

RequestModeRelease	::=SEQUENCE
{
	...
}

-- ===================================================================================
-- Request mode definitions: Mode description
-- ===================================================================================

ModeDescription	::=SET SIZE (1..256) OF ModeElement

ModeElement	::= SEQUENCE
{
	type		CHOICE
	{
		nonStandard	NonStandardParameter,
		videoMode	VideoMode,
		audioMode	AudioMode,
		dataMode	DataMode,
		encryptionMode	EncryptionMode,
		...
	},

	h223ModeParameters	H223ModeParameters OPTIONAL,
	...
}

H223ModeParameters	::=SEQUENCE
{
	adaptationLayerType	CHOICE
	{
		nonStandard	NonStandardParameter,
		al1Framed	NULL,
		al1NotFramed	NULL,
		al2WithoutSequenceNumbers	NULL,
		al2WithSequenceNumbers	NULL,
		al3		SEQUENCE
		{
			controlFieldOctets	INTEGER(0..2),
			sendBufferSize	INTEGER(0..16777215)	-- units octets
		},

		...
	},

	segmentableFlag	BOOLEAN,
	...
}

 

-- ===================================================================================
-- Request mode definitions: Video modes
-- ===================================================================================

VideoMode		::=CHOICE
{
	nonStandard	NonStandardParameter,
	h261VideoMode	H261VideoMode,
	h262VideoMode	H262VideoMode,
	h263VideoMode	H263VideoMode,
	is11172VideoMode	IS11172VideoMode,
	...
}

H261VideoMode	::=SEQUENCE
{
	resolution	CHOICE
	{
		qcif	NULL,
		cif		NULL
	},
	bitRate	INTEGER (1..19200),	-- units 100 bits/s
	stillImageTransmission	BOOLEAN,
	...
}

H262VideoMode	::=SEQUENCE
{
	profileAndLevel	CHOICE
	{
		profileAndLevel-SPatML	NULL,
		profileAndLevel-MPatLL	NULL,
		profileAndLevel-MPatML	NULL,
		profileAndLevel-MPatH-14	NULL,
		profileAndLevel-MPatHL	NULL,
		profileAndLevel-SNRatLL	NULL,
		profileAndLevel-SNRatML	NULL,
		profileAndLevel-SpatialatH-14	NULL,
		profileAndLevel-HPatML	NULL,
		profileAndLevel-HPatH-14	NULL,
		profileAndLevel-HPatHL	NULL,
		...
	},
	videoBitRate	INTEGER(0..1073741823) OPTIONAL,	-- units 400bits/sec
	vbvBufferSize	INTEGER(0..262143) OPTIONAL,	-- units 16384bits
	samplesPerLine	INTEGER(0..16383) OPTIONAL,	-- units samples/line
	linesPerFrame	INTEGER(0..16383) OPTIONAL,	-- units lines/frame
	framesPerSecond	INTEGER(0..15) OPTIONAL,	-- frame_rate_code
	luminanceSampleRate	INTEGER(0..4294967295) OPTIONAL,	-- units samples/sec
	...
}

H263VideoMode	::=SEQUENCE
{
	resolution	CHOICE
	{
		sqcif	NULL,	
		qcif	NULL,
		cif		NULL,
		cif4	NULL,
		cif16	NULL,
		...
	},
	bitRate	INTEGER (1..19200),	-- units 100 bits/s
	unrestrictedVector	BOOLEAN,
	arithmeticCoding	BOOLEAN,
	advancedPrediction	BOOLEAN,
	pbFrames	BOOLEAN,
	...
}

IS11172VideoMode	::=SEQUENCE
{
	constrainedBitstream	BOOLEAN,
	videoBitRate	INTEGER(0..1073741823) OPTIONAL,	-- units 400bits/sec
	vbvBufferSize	INTEGER(0..262143) OPTIONAL,	-- units 16384bits
	samplesPerLine	INTEGER(0..16383) OPTIONAL,	-- units samples/line
	linesPerFrame	INTEGER(0..16383) OPTIONAL,	-- units lines/frame
	pictureRate	INTEGER(0..15) OPTIONAL,
	luminanceSampleRate	INTEGER(0..4294967295) OPTIONAL,	-- units samples/sec
	...
}

-- ===================================================================================
-- Request mode definitions: Audio modes
-- ===================================================================================

AudioMode	::=CHOICE
{
	nonStandard	NonStandardParameter,
	g711Alaw64k	NULL,
	g711Alaw56k	NULL,
	g711Ulaw64k	NULL,
	g711Ulaw56k	NULL,

	g722-64k	NULL,
	g722-56k	NULL,
	g722-48k	NULL,

	g728		NULL,
	g729		NULL,
	g-dsvd		NULL,

	g7231		CHOICE
	{
		noSilenceSuppressionLowRate	NULL,
		noSilenceSuppressionHighRate	NULL,
		silenceSuppressionLowRate	NULL,
		silenceSuppressionHighRate	NULL
	},

	is11172AudioMode	IS11172AudioMode,
	is13818AudioMode	IS13818AudioMode,

	...
}

IS11172AudioMode	::=SEQUENCE
{
	audioLayer	CHOICE
	{
		audioLayer1	NULL,
		audioLayer2	NULL,
		audioLayer3	NULL
	},

	audioSampling	CHOICE
	{
		audioSampling32k	NULL,
		audioSampling44k1	NULL,
		audioSampling48k	NULL
	},

	multichannelType	CHOICE
	{
		singleChannel	NULL,
		twoChannelStereo	NULL,
		twoChannelDual	NULL
	},

	bitRate	INTEGER (1..448),	--units kbit/sec
	...
}

IS13818AudioMode	::=SEQUENCE
{
	audioLayer	CHOICE
	{
		audioLayer1	NULL,
		audioLayer2	NULL,
		audioLayer3	NULL
	},

	audioSampling	CHOICE
	{
		audioSampling16k	NULL,
		audioSampling22k05	NULL,
		audioSampling24k	NULL,
		audioSampling32k	NULL,
		audioSampling44k1	NULL,
		audioSampling48k	NULL
	},

	multichannelType	CHOICE
	{
		singleChannel	NULL,
		twoChannelStereo	NULL,
		twoChannelDual	NULL,
		threeChannels2-1	NULL,
		threeChannels3-0	NULL,
		fourChannels2-0-2-0	NULL,
		fourChannels2-2	NULL,
		fourChannels3-1	NULL,
		fiveChannels3-0-2-0	NULL,
		fiveChannels3-2	NULL
	},

	lowFrequencyEnhancement	BOOLEAN,

	multilingual	BOOLEAN,

	bitRate	INTEGER (1..1130),	--units kbit/sec
	...
}

-- ===================================================================================
-- Request mode definitions: Data modes
-- ===================================================================================

DataMode		::=SEQUENCE
{
	application	CHOICE
	{
		nonStandard	NonStandardParameter,
		t120	DataProtocolCapability,
		dsm-cc	DataProtocolCapability,
		userData	DataProtocolCapability,
		t84	DataProtocolCapability,
		t434	DataProtocolCapability,
		h224	DataProtocolCapability,
		nlpid	SEQUENCE
		{
			nlpidProtocol	DataProtocolCapability,
			nlpidData	OCTET STRING
		},
		dsvdControl	NULL,
		h222DataPartitioning	DataProtocolCapability,
		...
	},
	bitRate	INTEGER (0..4294967295),	-- units 100 bits/sec
	...
}

-- ===================================================================================
-- Request mode definitions: Encryption modes
-- ===================================================================================

EncryptionMode	::=CHOICE
{
	nonStandard	NonStandardParameter,
	h233Encryption	NULL,
	...
}


-- ===================================================================================
-- Round Trip Delay definitions
-- ===================================================================================

RoundTripDelayRequest	::=SEQUENCE
{
	sequenceNumber	SequenceNumber,
	...
}

RoundTripDelayResponse	::=SEQUENCE
{
	sequenceNumber	SequenceNumber,
	...
}

-- ===================================================================================
-- Maintenance Loop definitions
-- ===================================================================================

MaintenanceLoopRequest	::=SEQUENCE
{
	type		CHOICE
	{
		systemLoop	NULL,
		mediaLoop	LogicalChannelNumber,
		logicalChannelLoop	LogicalChannelNumber,
		...
	},
	...
}

MaintenanceLoopAck	::=SEQUENCE
{
	type		CHOICE
	{
		systemLoop	NULL,
		mediaLoop	LogicalChannelNumber,
		logicalChannelLoop	LogicalChannelNumber,
		...
	},
	...
}

MaintenanceLoopReject	::=SEQUENCE
{
	type		CHOICE
	{
		systemLoop	NULL,
		mediaLoop	LogicalChannelNumber,
		logicalChannelLoop	LogicalChannelNumber,
		...
	},
	cause		CHOICE
	{
		canNotPerformLoop	NULL,
		...
	},
	...
}

MaintenanceLoopOffCommand	::=SEQUENCE
{
	...
}


-- ===================================================================================
-- Command Message definitions
-- ===================================================================================

-- ===================================================================================
-- Command Message : Send Terminal Capability Set
-- ===================================================================================

SendTerminalCapabilitySet	::=CHOICE
{
	specificRequest	SEQUENCE
	{
		multiplexCapability	BOOLEAN,

		capabilityTableEntryNumbers	SET SIZE (1..65535) OF CapabilityTableEntryNumber OPTIONAL,

		capabilityDescriptorNumbers	SET SIZE (1..256) OF CapabilityDescriptorNumber OPTIONAL,
		...
	},
	genericRequest	NULL,
	...
}

-- ===================================================================================
-- Command Message : Encryption
-- ===================================================================================

EncryptionCommand	::=CHOICE
{
	encryptionSE	OCTET STRING,	-- per H.233, but no error protection
	encryptionIVRequest	NULL,	-- requests new IV
	encryptionAlgorithmID	SEQUENCE
	{
		h233AlgorithmIdentifier	SequenceNumber,
		associatedAlgorithm	NonStandardParameter
	},
	...
}

-- ===================================================================================
-- Command Message : Flow Control
-- ===================================================================================

FlowControlCommand	::=SEQUENCE
{
	scope		CHOICE
	{
		logicalChannelNumber	LogicalChannelNumber,
		resourceID	INTEGER (0..65535),
		wholeMultiplex	NULL
	},
	restriction	CHOICE
	{
		maximumBitRate	INTEGER (0..16777215),	-- units 100 bits per second 
		noRestriction	NULL
	},
	...
}

-- ===================================================================================
-- Command Message : Change or End Session
-- ===================================================================================

EndSessionCommand	::=CHOICE
{
	nonStandard	NonStandardParameter,

	disconnect	NULL,

	gstnOptions	CHOICE
	{
		telephonyMode	NULL,
		v8bis	NULL,
		v34DSVD	NULL,
		v34DuplexFAX	NULL,
		v34H324	NULL,
		...
	},

	...
}

-- ===================================================================================
-- Command Message : Miscellaneous H.230-like commands
-- ===================================================================================

MiscellaneousCommand	::=SEQUENCE
{
	logicalChannelNumber	LogicalChannelNumber,
	type		CHOICE
	{
		equaliseDelay	NULL,	-- same as H.230 ACE
		zeroDelay	NULL,	-- same as H.230 ACZ
		multipointModeCommand	NULL,
		cancelMultipointModeCommand	NULL,
		videoFreezePicture	NULL,
		videoFastUpdatePicture	NULL,

		videoFastUpdateGOB	SEQUENCE
		{
			firstGOB	INTEGER (0..17),
			numberOfGOBs	INTEGER (1..18)
		},

		videoTemporalSpatialTradeOff	INTEGER (0..31),	-- commands a trade-off value

		videoSendSyncEveryGOB	NULL,
		videoSendSyncEveryGOBCancel	NULL,

		...
	},

	...
}


-- ===================================================================================
-- Indication Message definitions
-- ===================================================================================

-- ===================================================================================
-- Indication Message : Function not supported
-- ===================================================================================

-- This is used to return a complete request, response or command that is not recognised

FunctionNotSupported	::=CHOICE
{
	request	RequestMessage,
	response	ResponseMessage,
	command	CommandMessage
}

-- ===================================================================================
-- Indication Message : Miscellaneous H.230-like indication
-- ===================================================================================

MiscellaneousIndication	::=SEQUENCE
{
	logicalChannelNumber	LogicalChannelNumber,
	type		CHOICE
	{
		logicalChannelActive	NULL,	-- same as H.230 AIA and VIA
		logicalChannelInactive	NULL,	-- same as H.230 AIM and VIS

		multipointConference	NULL,	
		cancelMultipointConference	NULL,	

		multipointZeroComm	NULL,	-- same as H.230 MIZ
		cancelMultipointZeroComm	NULL,	-- same as H.230 cancel MIZ

		multipointSecondaryStatus	NULL,	-- same as H.230 MIS
		cancelMultipointSecondaryStatus	NULL,	-- same as H.230 cancel MIS

		videoIndicateReadyToActivate	NULL,	-- same as H.230 VIR

		videoTemporalSpatialTradeOff	INTEGER (0..31),	-- indicates current trade-off

		...
	},
	...
}

-- ===================================================================================
-- Indication Message : Jitter Indication
-- ===================================================================================

JitterIndication	::=SEQUENCE
{
	scope		CHOICE
	{
		logicalChannelNumber	LogicalChannelNumber,
		resourceID	INTEGER (0..65535),
		wholeMultiplex	NULL
	},
	estimatedReceivedJitterMantissa	INTEGER (0..3),
	estimatedReceivedJitterExponent	INTEGER (0..7),
	skippedFrameCount	INTEGER (0..15) OPTIONAL,
	additionalDecoderBuffer	INTEGER (0..262143) OPTIONAL,	-- 262143 is 2^18 - 1
	...
}

-- ===================================================================================
-- Indication Message : H.223 logical channel skew
-- ===================================================================================

H223SkewIndication	::=SEQUENCE
{
	logicalChannelNumber1	LogicalChannelNumber,
	logicalChannelNumber2	LogicalChannelNumber,
	skew		INTEGER (0..4095),	-- units milliseconds
	...
}

-- ===================================================================================
-- Indication Message : New ATM virtual channel indication
-- ===================================================================================

NewATMVCIndication	::=SEQUENCE
{
	resourceID	INTEGER(0..65535),
	bitRate	INTEGER(1..65535),	-- units 64 kbits per second
	bitRateLockedToPCRClock	BOOLEAN,
	bitRateLockedToNetworkClock	BOOLEAN,
	aal			CHOICE
	{
		aal1	SEQUENCE
		{
			clockRecovery	CHOICE
			{
				nullClockRecovery	NULL,
				srtsClockRecovery	NULL,
				adaptiveClockRecovery	NULL,
				...
			},
			errorCorrection	CHOICE
			{
				nullErrorCorrection	NULL,
				longInterleaver	NULL,
				shortInterleaver	NULL,
				errorCorrectionOnly	NULL,
				...
			},
			structuredDataTransfer	BOOLEAN,
			partiallyFilledCells	BOOLEAN,
			...
		},
		aal5	SEQUENCE
		{
			forwardMaximumSDUSize	INTEGER (0..65535),	-- units octets
			backwardMaximumSDUSize	INTEGER (0..65535),	-- units octets
			...
		},
		...
	},
	multiplex	CHOICE
	{
		noMultiplex	NULL,
		transportStream	NULL,
		programStream	NULL,
		...
	},
	...
}

-- ===================================================================================
-- Indication Message : user input
-- ===================================================================================

UserInputIndication	::=CHOICE
{
	nonStandard	NonStandardParameter,
	alphanumeric	GeneralString,
	...
}


END