cap.asn

基于h323协议的软phone

-- This file holds some of the H.245 types, which are not written in h245.asn as they should.
-- The reason for that is the need of the types in this file in both h245.asn and h225asn1.asn.

H323-MESSAGES-CAP DEFINITIONS AUTOMATIC TAGS ::=


BEGIN



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

NonStandardIdentifier   ::=CHOICE
{
    object      OBJECT IDENTIFIER,
    h221NonStandard SEQUENCE
    {
        t35CountryCode  INTEGER (0..255),   -- country, per T.35 Annex A
        t35Extension    INTEGER (0..255),
                -- assigned nationally unless t35CountryCode is binary
                -- 1111 1111, in which case it shall contain the country code
                -- according to T.35 Annex B
        manufacturerCode    INTEGER (0..65535)  -- assigned nationally
    }
}

DataProtocolCapability  ::=CHOICE
{
    nonStandard NonStandardParameter,
    v14buffered NULL,
    v42lapm NULL,   -- may negotiate to V.42bis
    hdlcFrameTunnelling NULL,
    h310SeparateVCStack NULL,
    h310SingleVCStack   NULL,
    transparent NULL,
    ...,
    segmentationAndReassembly   NULL,
    hdlcFrameTunnelingwSAR  NULL,
    v120        NULL,   -- as in H.230
    separateLANStack    NULL,
       v76wCompression          CHOICE
    {
        transmitCompression         CompressionType,
        receiveCompression      CompressionType,
        transmitAndReceiveCompression   CompressionType,
        ...
    },
    tcp         NULL,
    udp         NULL
}

CompressionType     ::=CHOICE
{
    v42bis      V42bis,
    ...
}

V42bis          ::=SEQUENCE
{
    numberOfCodewords   INTEGER (1..65536),
    maximumStringLength INTEGER (1..256),
    ...
}


T38FaxProfile   ::=SEQUENCE
{
    fillBitRemoval  BOOLEAN,
    transcodingJBIG BOOLEAN,
    transcodingMMR  BOOLEAN,
    ...,
    version INTEGER (0..255),
                -- Version 0, the default, refers to T.38 (1998)
    t38FaxRateManagement    T38FaxRateManagement,
                -- The default Data Rate Management is
                -- determined by the choice of
                -- DataProtocolCapability
    t38FaxUdpOptions    T38FaxUdpOptions OPTIONAL,
                -- For UDP,  t38UDPRedundancy is the default
    t38FaxTcpOptions    T38FaxTcpOptions OPTIONAL
}

T38FaxRateManagement    ::= CHOICE
{
    localTCF    NULL,
    transferredTCF  NULL,
    ...
}

T38FaxUdpOptions    ::= SEQUENCE
{
    t38FaxMaxBuffer INTEGER OPTIONAL,
    t38FaxMaxDatagram   INTEGER OPTIONAL,
    t38FaxUdpEC CHOICE
    {
        t38UDPFEC   NULL,
        t38UDPRedundancy    NULL,
        ...
    }
}

T38FaxTcpOptions    ::= SEQUENCE
{
         t38TCPBidirectionalMode            BOOLEAN,
    ...
}



END