--
-- Abstract Syntax Notion (ASN.1) file for H.225.0 Version 4
--

H323-MESSAGES DEFINITIONS AUTOMATIC TAGS ::=
BEGIN


IMPORTS
                SIGNED--{}--,
                ENCRYPTED--{}--,
                HASHED--{}--,
                ChallengeString,
                TimeStamp,
                RandomVal,
                Password,
                EncodedPwdCertToken,
                ClearToken,
                CryptoToken,
                AuthenticationMechanism,
                DHset,
                TypedCertificate,
                Identifier,
                Params,
                ECKASDH
        FROM H235-SECURITY-MESSAGES
                DataProtocolCapability,
                T38FaxProfile
--        FROM MULTIMEDIA-SYSTEM-CONTROL;
        FROM H323-MESSAGES-CAP;

H323-UserInformation ::= [PRIVATE 0] SEQUENCE       -- root for all Q.931 related ASN.1
{
        h323-uu-pdu     H323-UU-PDU,
        user-data       SEQUENCE
        {
                protocol-discriminator          INTEGER (0..255),
                user-information                OCTET STRING (SIZE(1..131)),
                ...
        } OPTIONAL,
        ...
}

H323-UU-PDU ::= SEQUENCE
{
        h323-message-body   CHOICE
        {
                setup                   Setup-UUIE,
                callProceeding          CallProceeding-UUIE,
                connect                 Connect-UUIE,
                alerting                Alerting-UUIE,
                information             Information-UUIE,
                releaseComplete         ReleaseComplete-UUIE,
                facility                Facility-UUIE,
                ...,
                progress                Progress-UUIE,
                empty                   NULL,           -- used when a Facility message is sent,
                                                        -- but the Facility-UUIE is not to be invoked
                                                        -- (possible when transporting supplementary
                                                        -- services messages in versions prior to
                                                        -- H.225.0 version 4). Also used as specified
                                                        -- in H.323 to send messages that are not
                                                        -- call related.

                status                  Status-UUIE,
                statusInquiry           StatusInquiry-UUIE,
                setupAcknowledge        SetupAcknowledge-UUIE,
                notify                  Notify-UUIE
        },
        nonStandardData                 NonStandardParameter OPTIONAL,
        ...,
        h4501SupplementaryService       SEQUENCE OF OCTET STRING OPTIONAL,
                                                -- each sequence of octet string is defined as one
                                                -- H4501SupplementaryService APDU as defined in
                                                -- Table 3/H.450.1

        h245Tunneling                   BOOLEAN, -- if TRUE, tunneling of H.245 messages is enabled
        h245Control                     SEQUENCE OF OCTET STRING OPTIONAL,
        nonStandardControl              SEQUENCE OF NonStandardParameter OPTIONAL,
        callLinkage                     CallLinkage OPTIONAL,
        tunnelledSignallingMessage      SEQUENCE
        {
                tunnelledProtocolID     TunnelledProtocol,              -- tunnelled signalling protocol ID
                messageContent          SEQUENCE OF OCTET STRING,       -- sequence of entire message(s)
                tunnellingRequired      NULL OPTIONAL,
                nonStandardData NonStandardParameter OPTIONAL,
                ...
        } OPTIONAL,
        provisionalRespToH245Tunneling  NULL OPTIONAL,
        stimulusControl                 StimulusControl OPTIONAL,
        genericData                     SEQUENCE OF GenericData OPTIONAL
}

StimulusControl ::= SEQUENCE
{
        nonStandard                     NonStandardParameter OPTIONAL,
        isText                          NULL OPTIONAL,
        h248Message                     OCTET STRING OPTIONAL,
        ...
}

Alerting-UUIE ::= SEQUENCE
{
        protocolIdentifier      ProtocolIdentifier,
        destinationInfo         EndpointType,
        h245Address             TransportAddress OPTIONAL,
        ...,
        callIdentifier          CallIdentifier,
        h245SecurityMode        H245Security OPTIONAL,
        tokens                  SEQUENCE OF ClearToken OPTIONAL,
        cryptoTokens            SEQUENCE OF CryptoH323Token OPTIONAL,
        fastStart               SEQUENCE OF OCTET STRING OPTIONAL,
        multipleCalls           BOOLEAN,
        maintainConnection      BOOLEAN,
        alertingAddress         SEQUENCE OF AliasAddress OPTIONAL,
        presentationIndicator   PresentationIndicator OPTIONAL,
        screeningIndicator      ScreeningIndicator OPTIONAL,
        fastConnectRefused      NULL OPTIONAL,
        serviceControl          SEQUENCE OF ServiceControlSession OPTIONAL,
        capacity                CallCapacity OPTIONAL,
        featureSet              FeatureSet OPTIONAL
}

CallProceeding-UUIE ::= SEQUENCE
{
        protocolIdentifier      ProtocolIdentifier,
        destinationInfo         EndpointType,
        h245Address             TransportAddress OPTIONAL,
        ...,
        callIdentifier          CallIdentifier,
        h245SecurityMode        H245Security OPTIONAL,
        tokens                  SEQUENCE OF ClearToken OPTIONAL,
        cryptoTokens            SEQUENCE OF CryptoH323Token OPTIONAL,
        fastStart               SEQUENCE OF OCTET STRING OPTIONAL,
        multipleCalls           BOOLEAN,
        maintainConnection      BOOLEAN,
        fastConnectRefused      NULL OPTIONAL,
        featureSet              FeatureSet OPTIONAL
}

Connect-UUIE ::= SEQUENCE
{
        protocolIdentifier      ProtocolIdentifier,
        h245Address             TransportAddress OPTIONAL,
        destinationInfo         EndpointType,
        conferenceID            ConferenceIdentifier,
        ...,
        callIdentifier          CallIdentifier,
        h245SecurityMode        H245Security OPTIONAL,
        tokens                  SEQUENCE OF ClearToken OPTIONAL,
        cryptoTokens            SEQUENCE OF CryptoH323Token OPTIONAL,
        fastStart               SEQUENCE OF OCTET STRING OPTIONAL,
        multipleCalls           BOOLEAN,
        maintainConnection      BOOLEAN,
        language                SEQUENCE OF IA5String (SIZE (1..32)) OPTIONAL, -- RFC1766 language tag
        connectedAddress        SEQUENCE OF AliasAddress OPTIONAL,
        presentationIndicator   PresentationIndicator OPTIONAL,
        screeningIndicator      ScreeningIndicator OPTIONAL,
        fastConnectRefused      NULL OPTIONAL,
        serviceControl          SEQUENCE OF ServiceControlSession OPTIONAL,
        capacity                CallCapacity OPTIONAL,
        featureSet              FeatureSet OPTIONAL
}

Information-UUIE ::=SEQUENCE
{
        protocolIdentifier      ProtocolIdentifier,
        ...,
        callIdentifier          CallIdentifier,
        tokens                  SEQUENCE OF ClearToken OPTIONAL,
        cryptoTokens            SEQUENCE OF CryptoH323Token OPTIONAL,
        fastStart               SEQUENCE OF OCTET STRING OPTIONAL,
        fastConnectRefused      NULL OPTIONAL,
        circuitInfo             CircuitInfo OPTIONAL
}

ReleaseComplete-UUIE ::= SEQUENCE
{
        protocolIdentifier      ProtocolIdentifier,
        reason                  ReleaseCompleteReason OPTIONAL,
        ...,
        callIdentifier          CallIdentifier,
        tokens                  SEQUENCE OF ClearToken OPTIONAL,
        cryptoTokens            SEQUENCE OF CryptoH323Token OPTIONAL,
        busyAddress             SEQUENCE OF AliasAddress OPTIONAL,
        presentationIndicator   PresentationIndicator OPTIONAL,
        screeningIndicator      ScreeningIndicator OPTIONAL,
        capacity                CallCapacity OPTIONAL,
        serviceControl          SEQUENCE OF ServiceControlSession OPTIONAL,
        featureSet              FeatureSet OPTIONAL
}

ReleaseCompleteReason ::= CHOICE
{
        noBandwidth                     NULL,   -- bandwidth taken away or ARQ denied
        gatekeeperResources             NULL,   -- exhausted
        unreachableDestination          NULL,   -- no transport path to the destination
        destinationRejection            NULL,   -- rejected at destination
        invalidRevision                 NULL,
        noPermission                    NULL,   -- called party's gatekeeper rejects
        unreachableGatekeeper           NULL,   -- terminal cannot reach gatekeeper for ARQ
        gatewayResources                NULL,
        badFormatAddress                NULL,
        adaptiveBusy                    NULL,   -- call is dropping due to LAN crowding
        inConf                          NULL,   -- no address in AlternativeAddress
        undefinedReason                 NULL,
        ...,
        facilityCallDeflection          NULL,   -- call was deflected using a Facility message
        securityDenied                  NULL,   -- incompatible security settings
        calledPartyNotRegistered        NULL,   -- used by gatekeeper when endpoint has
                                                -- preGrantedARQ to bypass ARQ/ACF
        callerNotRegistered             NULL,   -- used by gatekeeper when endpoint has
                                                -- preGrantedARQ to bypass ARQ/ACF
        newConnectionNeeded             NULL,   -- indicates that the Setup was not accepted on this
                                                -- connection, but that the Setup may be accepted on
                                                -- a new connection
        nonStandardReason               NonStandardParameter,
        replaceWithConferenceInvite     ConferenceIdentifier,   -- call dropped due to subsequent
                                                                -- invitation to a conference
                                                                -- (see H.323 8.4.3.8)
        genericDataReason               NULL,
        neededFeatureNotSupported       NULL,
        tunnelledSignallingRejected     NULL,
        invalidCID                      NULL
}

Setup-UUIE ::= SEQUENCE
{
        protocolIdentifier              ProtocolIdentifier,
        h245Address                     TransportAddress OPTIONAL,
        sourceAddress                   SEQUENCE OF AliasAddress OPTIONAL,
        sourceInfo                      EndpointType,
        destinationAddress              SEQUENCE OF AliasAddress OPTIONAL,
        destCallSignalAddress           TransportAddress OPTIONAL,
        destExtraCallInfo               SEQUENCE OF AliasAddress OPTIONAL,              -- Note 1
        destExtraCRV                    SEQUENCE OF CallReferenceValue OPTIONAL,        -- Note 1
        activeMC                        BOOLEAN,
        conferenceID                    ConferenceIdentifier,
        conferenceGoal                  CHOICE
        {
                create                          NULL,
                join                            NULL,
                invite                          NULL,
                ...,
                capability-negotiation          NULL,
                callIndependentSupplementaryService             NULL
        },
        callServices                    QseriesOptions  OPTIONAL,
        callType                        CallType,
        ...,
        sourceCallSignalAddress         TransportAddress OPTIONAL,
        remoteExtensionAddress          AliasAddress OPTIONAL,
        callIdentifier                  CallIdentifier,
        h245SecurityCapability          SEQUENCE OF H245Security OPTIONAL,
        tokens                          SEQUENCE OF ClearToken OPTIONAL,
        cryptoTokens                    SEQUENCE OF CryptoH323Token OPTIONAL,
        fastStart                       SEQUENCE OF OCTET STRING OPTIONAL,
        mediaWaitForConnect             BOOLEAN,
        canOverlapSend                  BOOLEAN,
        endpointIdentifier              EndpointIdentifier OPTIONAL,
        multipleCalls                   BOOLEAN,
        maintainConnection              BOOLEAN,
        connectionParameters            SEQUENCE        -- additional gateway parameters
        {
                connectionType                  ScnConnectionType,
                numberOfScnConnections          INTEGER (0..65535),
                connectionAggregation           ScnConnectionAggregation,
                ...
        } OPTIONAL,
        language                        SEQUENCE OF IA5String (SIZE (1..32)) OPTIONAL, -- RFC1766 language tag
        presentationIndicator           PresentationIndicator OPTIONAL,
        screeningIndicator              ScreeningIndicator OPTIONAL,
        serviceControl                  SEQUENCE OF ServiceControlSession OPTIONAL,
        symmetricOperationRequired      NULL OPTIONAL,
        capacity                        CallCapacity OPTIONAL,
        circuitInfo                     CircuitInfo OPTIONAL,
        desiredProtocols                SEQUENCE OF SupportedProtocols OPTIONAL,
        neededFeatures                  SEQUENCE OF FeatureDescriptor OPTIONAL,
        desiredFeatures                 SEQUENCE OF FeatureDescriptor OPTIONAL,
        supportedFeatures               SEQUENCE OF FeatureDescriptor OPTIONAL,
        parallelH245Control             SEQUENCE OF OCTET STRING OPTIONAL,
        additionalSourceAddresses       SEQUENCE OF ExtendedAliasAddress OPTIONAL -- deprecated
}

ScnConnectionType ::= CHOICE
{
        unknown         NULL,   -- should be seleceted when connection type is unknown
        bChannel        NULL,   -- each individual connection on the SCN is 64kbps.
                                        -- Note that where SCN delivers 56kbps usable data, the
                                        -- actual bandwidth allocated on SCN is still 64kbps.
        hybrid2x64      NULL,   -- each connection is a 128kbps hybrid call
        hybrid384       NULL,   -- each connection is an H0 (384kbps) hybrid call
        hybrid1536      NULL,   -- each connection is an H11 (1536kbps) hybrid call
        hybrid1920      NULL,   -- each connection is an H12 (1920kbps) hybrid call
        multirate       NULL,   -- bandwidth supplied by SCN using multirate.
                                        -- In this case, the information transfer rate octet in the
                                        -- bearer capability shall be set to multirate and the rate
                                        -- multiplier octet shall denote the number of B channels.
        ...
}

ScnConnectionAggregation ::= CHOICE
{
        auto            NULL,   -- aggregation mechanism is unknown
        none            NULL,   -- call produced using a single SCN connection
        h221            NULL,   -- use H.221 framing to aggregate the connections
        bonded-mode1    NULL,   -- use ISO/IEC 13871 bonding mode 1.