ANNEXG-MESSAGES DEFINITIONS AUTOMATIC TAGS ::=
BEGIN

IMPORTS
  AuthenticationMechanism, TimeStamp, ClearToken
    FROM H235-SECURITY-MESSAGES
  AliasAddress, TransportAddress, ReleaseCompleteReason, ConferenceIdentifier,
    CallIdentifier, CryptoH323Token, CryptoToken, EndpointType,
    GatekeeperIdentifier, GloballyUniqueID, NonStandardParameter, NumberDigits,
    PartyNumber, TransportQOS, VendorIdentifier, IntegrityMechanism, 
    ICV
    FROM H323-MESSAGES;

Message ::= SEQUENCE {body    AnnexGMessageBody,
                      common  AnnexGCommonInfo,
                      ...
}

AnnexGMessageBody ::= CHOICE {
  serviceRequest               ServiceRequest,
  serviceConfirmation          ServiceConfirmation,
  serviceRejection             ServiceRejection,
  serviceRelease               ServiceRelease,
  descriptorRequest            DescriptorRequest,
  descriptorConfirmation       DescriptorConfirmation,
  descriptorRejection          DescriptorRejection,
  descriptorIDRequest          DescriptorIDRequest,
  descriptorIDConfirmation     DescriptorIDConfirmation,
  descriptorIDRejection        DescriptorIDRejection,
  descriptorUpdate             DescriptorUpdate,
  descriptorUpdateAck          DescriptorUpdateAck,
  accessRequest                AccessRequest,
  accessConfirmation           AccessConfirmation,
  accessRejection              AccessRejection,
  requestInProgress            RequestInProgress,
  nonStandardRequest           NonStandardRequest,
  nonStandardConfirmation      NonStandardConfirmation,
  nonStandardRejection         NonStandardRejection,
  unknownMessageResponse       UnknownMessageResponse,
  usageRequest                 UsageRequest,
  usageConfirmation            UsageConfirmation,
  usageIndication              UsageIndication,
  usageIndicationConfirmation  UsageIndicationConfirmation,
  usageIndicationRejection     UsageIndicationRejection,
  usageRejection               UsageRejection,
  validationRequest            ValidationRequest,
  validationConfirmation       ValidationConfirmation,
  validationRejection          ValidationRejection,
  ...
}

AnnexGCommonInfo ::= SEQUENCE {
  sequenceNumber       INTEGER(0..65535),
  version              AnnexGVersion,
  hopCount             INTEGER(1..255),
  replyAddress         SEQUENCE OF TransportAddress OPTIONAL,
  -- Must be present in request
  integrityCheckValue  ICV OPTIONAL,
  tokens               SEQUENCE OF ClearToken OPTIONAL,
  cryptoTokens         SEQUENCE OF CryptoH323Token OPTIONAL,
  nonStandard          SEQUENCE OF NonStandardParameter OPTIONAL,
  ...
}

--
-- Annex G messages
--
ServiceRequest ::= SEQUENCE {
  elementIdentifier  ElementIdentifier OPTIONAL,
  domainIdentifier   AliasAddress OPTIONAL,
  securityMode       SEQUENCE OF SecurityMode OPTIONAL,
  timeToLive         INTEGER(1..4294967295) OPTIONAL,
  ...
}

SecurityMode ::= SEQUENCE {
  authentication  AuthenticationMechanism OPTIONAL,
  integrity       IntegrityMechanism OPTIONAL,
  algorithmOIDs   SEQUENCE OF OBJECT IDENTIFIER OPTIONAL,
  ...
}

ServiceConfirmation ::= SEQUENCE {
  elementIdentifier  ElementIdentifier,
  domainIdentifier   AliasAddress,
  alternates         AlternateBEInfo OPTIONAL,
  securityMode       SecurityMode OPTIONAL,
  timeToLive         INTEGER(1..4294967295) OPTIONAL,
  ...
}

ServiceRejection ::= SEQUENCE {
  reason      ServiceRejectionReason,
  alternates  AlternateBEInfo OPTIONAL,
  ...
}

ServiceRejectionReason ::= CHOICE {
  serviceUnavailable  NULL,
  serviceRedirected   NULL,
  security            NULL,
  continue            NULL,
  undefined           NULL,
  ...
}

ServiceRelease ::= SEQUENCE {
  reason      ServiceReleaseReason,
  alternates  AlternateBEInfo OPTIONAL,
  ...
}

ServiceReleaseReason ::= CHOICE {
  outOfService  NULL,
  maintenance   NULL,
  terminated    NULL,
  expired       NULL,
  ...
}

DescriptorRequest ::= SEQUENCE {descriptorID  SEQUENCE OF DescriptorID,
                                ...
}

DescriptorConfirmation ::= SEQUENCE {descriptor  SEQUENCE OF Descriptor,
                                     ...
}

DescriptorRejection ::= SEQUENCE {
  reason        DescriptorRejectionReason,
  descriptorID  DescriptorID OPTIONAL,
  ...
}

DescriptorRejectionReason ::= CHOICE {
  packetSizeExceeded     NULL, -- use other transport type
  illegalID              NULL, -- no descriptor for provided descriptorID
  security               NULL, -- request did not meet security requirements
  hopCountExceeded       NULL,
  noServiceRelationship  NULL,
  undefined              NULL,
  ...
}

DescriptorIDRequest ::= SEQUENCE {...
}

DescriptorIDConfirmation ::= SEQUENCE {
  descriptorInfo  SEQUENCE OF DescriptorInfo,
  ...
}

DescriptorIDRejection ::= SEQUENCE {reason  DescriptorIDRejectionReason,
                                    ...
}

DescriptorIDRejectionReason ::= CHOICE {
  noDescriptors          NULL, -- no descriptors to report
  security               NULL, -- request did not meet security requirements
  hopCountExceeded       NULL,
  noServiceRelationship  NULL,
  undefined              NULL,
  ...
}

DescriptorUpdate ::= SEQUENCE {
  sender      AliasAddress,
  updateInfo  SEQUENCE OF UpdateInformation,
  ...
}

UpdateInformation ::= SEQUENCE {
  descriptorInfo
    CHOICE {descriptorID  DescriptorID,
            descriptor    Descriptor,
            ...},
  updateType      CHOICE {added    NULL,
                          deleted  NULL,
                          changed  NULL,
                          ...},
  ...
}

DescriptorUpdateAck ::= SEQUENCE {...
}

AccessRequest ::= SEQUENCE {
  destinationInfo  PartyInformation,
  sourceInfo       PartyInformation OPTIONAL,
  callInfo         CallInformation OPTIONAL,
  usageSpec        UsageSpecification OPTIONAL,
  ...
}

AccessConfirmation ::= SEQUENCE {
  templates        SEQUENCE OF AddressTemplate,
  partialResponse  BOOLEAN,
  ...
}

AccessRejection ::= SEQUENCE {reason  AccessRejectionReason,
                              ...
}

AccessRejectionReason ::= CHOICE {
  noMatch                NULL, -- no template matched the destinationInfo
  packetSizeExceeded     NULL, -- use other transport type
  security               NULL, -- request did not meet security requirements
  hopCountExceeded       NULL,
  needCallInformation    NULL, -- Call Information must be specified
  noServiceRelationship  NULL,
  undefined              NULL,
  ...
}

UsageRequest ::= SEQUENCE {
  callInfo   CallInformation,
  usageSpec  UsageSpecification,
  ...
}

UsageConfirmation ::= SEQUENCE {...
}

UsageRejection ::= SEQUENCE {reason  UsageRejectReason,
                             ...
}

UsageIndication ::= SEQUENCE {
  callInfo          CallInformation,
  accessTokens      SEQUENCE OF AccessToken OPTIONAL,
  senderRole        Role,
  usageCallStatus   UsageCallStatus,
  srcInfo           PartyInformation OPTIONAL,
  destAddress       PartyInformation,
  startTime         TimeStamp OPTIONAL,
  endTime           TimeStamp OPTIONAL,
  terminationCause  TerminationCause OPTIONAL,
  usageFields       SEQUENCE OF UsageField,
  ...
}

UsageField ::= SEQUENCE {id     OBJECT IDENTIFIER,
                         value  OCTET STRING,
                         ...
}

UsageRejectReason ::= CHOICE {
  invalidCall            NULL,
  unavailable            NULL,
  security               NULL,
  noServiceRelationship  NULL,
  undefined              NULL,
  ...
}

UsageIndicationConfirmation ::= SEQUENCE {...
}

UsageIndicationRejection ::= SEQUENCE {
  reason  UsageIndicationRejectionReason,
  ...
}

UsageIndicationRejectionReason ::= CHOICE {
  unknownCall            NULL,
  incomplete             NULL,
  security               NULL,
  noServiceRelationship  NULL,
  undefined              NULL,
  ...
}

ValidationRequest ::= SEQUENCE {
  accessToken      SEQUENCE OF AccessToken OPTIONAL,
  destinationInfo  PartyInformation OPTIONAL,
  sourceInfo       PartyInformation OPTIONAL,
  callInfo         CallInformation,
  usageSpec        UsageSpecification OPTIONAL,
  ...
}

ValidationConfirmation ::= SEQUENCE {
  destinationInfo  PartyInformation OPTIONAL,
  usageSpec        UsageSpecification OPTIONAL,
  ...
}

ValidationRejection ::= SEQUENCE {reason  ValidationRejectionReason,
                                  ...
}

ValidationRejectionReason ::= CHOICE {
  tokenNotValid          NULL,
  security               NULL, -- request did not meet security requirements
  hopCountExceeded       NULL,
  missingSorceInfo       NULL,
  missingDestInfo        NULL,
  noServiceRelationship  NULL,
  undefined              NULL,
  ...
}

RequestInProgress ::= SEQUENCE {delay  INTEGER(1..65535),
                                ...
}

NonStandardRequest ::= SEQUENCE {...
}

NonStandardConfirmation ::= SEQUENCE {...
}

NonStandardRejection ::= SEQUENCE {reason  NonStandardRejectionReason,
                                   ...
}

NonStandardRejectionReason ::= CHOICE {
  notSupported           NULL,
  noServiceRelationship  NULL,
  undefined              NULL,
  ...
}

UnknownMessageResponse ::= SEQUENCE {
  unknownMessage  OCTET STRING,
  reason          UnknownMessageReason,
  ...
}

UnknownMessageReason ::= CHOICE {notUnderstood  NULL,
                                 undefined      NULL,
                                 ...
}

--
-- structures common to multiple messages
--
AddressTemplate ::= SEQUENCE {
  pattern     SEQUENCE OF Pattern,
  routeInfo   SEQUENCE OF RouteInformation,
  timeToLive  INTEGER(1..4294967295),
  ...
}

Pattern ::= CHOICE {
  specific  AliasAddress,
  wildcard  AliasAddress,
  range     SEQUENCE {startOfRange  PartyNumber,
                      endOfRange    PartyNumber},
  ...
}

RouteInformation ::= SEQUENCE {
  messageType
    CHOICE {sendAccessRequest  NULL,
            sendSetup          NULL,
            nonExistent        NULL,
            ...},
  callSpecific  BOOLEAN,
  usageSpec     UsageSpecification OPTIONAL,
  priceInfo     SEQUENCE OF PriceInfoSpec OPTIONAL,
  contacts      SEQUENCE OF ContactInformation,
  type          EndpointType OPTIONAL,
  -- must be present if messageType = sendSetup
  ...
}

ContactInformation ::= SEQUENCE {
  transportAddress  AliasAddress,
  priority          INTEGER(0..127),
  transportQoS      TransportQOS OPTIONAL,
  security          SEQUENCE OF SecurityMode OPTIONAL,
  accessTokens      SEQUENCE OF AccessToken OPTIONAL,
  ...
}

PriceInfoSpec ::= SEQUENCE {
  currency       IA5String(SIZE (3)), -- e.g. "USD"
  currencyScale  INTEGER(-127..127),
  validFrom      GlobalTimeStamp OPTIONAL,
  validUntil     GlobalTimeStamp OPTIONAL,
  hoursFrom      IA5String(SIZE (6)) OPTIONAL, -- "HHMMSS" UTC
  hoursUntil     IA5String(SIZE (6)) OPTIONAL, -- "HHMMSS" UTC
  priceElement   SEQUENCE OF PriceElement OPTIONAL,
  priceFormula   IA5String(SIZE (1..2048)) OPTIONAL,
  ...
}

PriceElement ::= SEQUENCE {
  amount   INTEGER(0..4294967295), -- meter increment
  quantum  INTEGER(0..4294967295), -- each or part
  
  -- thereof
  units
    CHOICE {seconds  NULL,
            packets  NULL,
            bytes    NULL,
            initial  NULL,
            minimum  NULL,
            maximum  NULL,
            ...},
  ...
}

Descriptor ::= SEQUENCE {
  descriptorInfo  DescriptorInfo,
  templates       SEQUENCE OF AddressTemplate,
  gatekeeperID    GatekeeperIdentifier OPTIONAL,
  ...
}

DescriptorInfo ::= SEQUENCE {
  descriptorID  DescriptorID,
  lastChanged   GlobalTimeStamp,
  ...
}

AlternateBEInfo ::= SEQUENCE {
  alternateBE           SEQUENCE OF AlternateBE,
  alternateIsPermanent  BOOLEAN,
  ...
}

AlternateBE ::= SEQUENCE {
  contactAddress     AliasAddress,
  priority           INTEGER(1..127),
  elementIdentifier  ElementIdentifier OPTIONAL,
  ...
}

AccessToken ::= CHOICE {
  token        ClearToken,
  cryptoToken  CryptoH323Token,
  ...
}

CallInformation ::= SEQUENCE {
  callIdentifier  CallIdentifier,
  conferenceID    ConferenceIdentifier,
  ...
}

UsageCallStatus ::= CHOICE {
  preConnect      NULL, -- Call has not started
  callInProgress  NULL, -- Call is in progress
  callEnded       NULL, -- Call ended
  ...
}

UserInformation ::= SEQUENCE {
  userIdentifier     AliasAddress,
  userAuthenticator  SEQUENCE OF CryptoH323Token OPTIONAL,
  ...
}

UsageSpecification ::= SEQUENCE {
  sendTo     ElementIdentifier,
  when
    SEQUENCE {never     NULL OPTIONAL,
              start     NULL OPTIONAL,
              end       NULL OPTIONAL,
              period    INTEGER(1..65535) OPTIONAL, -- in seconds--
              failures  NULL OPTIONAL,
              ...},
  required   SEQUENCE OF OBJECT IDENTIFIER,
  preferred  SEQUENCE OF OBJECT IDENTIFIER,
  ...
}

PartyInformation ::= SEQUENCE {
  logicalAddresses  SEQUENCE OF AliasAddress,
  domainIdentifier  AliasAddress OPTIONAL,
  transportAddress  AliasAddress OPTIONAL,
  endpointType      EndpointType OPTIONAL,
  userInfo          UserInformation OPTIONAL,
  timeZone          TimeZone OPTIONAL,
  ...
}

Role ::= CHOICE {
  originator       NULL,
  destination      NULL,
  nonStandardData  NonStandardParameter,
  ...
}

TimeZone ::= INTEGER(-43200..43200)

-- number of seconds relative to UTC
-- including DST if appropriate
TerminationCause ::= SEQUENCE {
  releaseCompleteReason  ReleaseCompleteReason,
  causeIE                INTEGER(1..65535) OPTIONAL,
  nonStandardData        NonStandardParameter OPTIONAL,
  ...
}

AnnexGVersion ::= OBJECT IDENTIFIER

-- shall be set to
-- {itu-t (0) recommendation (0) h(8) h225.0(2250)
-- Annex (1) G (7) version (0) 1 (0)}
DescriptorID ::=
  GloballyUniqueID

ElementIdentifier ::= BMPString(SIZE (1..128))

GlobalTimeStamp ::= IA5String(SIZE (14)) -- in the form YYYYMMDDHHmmSS
                             

-- where YYYY = year, MM = month, DD = day,
-- HH = hour, mm = minute, SS = second
-- (for example, 19981219120000 for noon
-- 19 December 1998)
END -- of ANNEXG-MESSAGES