No doubt somebody will confirm, but I would point out that moving the extension marker means no interworking at all betweeen deployed version 2 systems and version 4 messages, if PER is being used.
Correct. I have checked with the ITU TSB.
The following versions of H.225.0 are available: > Version Approbation > > 1.0 H.225.0 1996-11-11 > > 2.0 H.225.0 1998-02-06 > > 3.0 H.225.0 1999-09-30 > 3.1 H.225.0 Annex G 1999-05-27 > 3.2 H.225.0 Annex I 1998-09-25 > > 4.0 H.225.0 2000-11-17 > 4.1 H.225.0 (2000) Amend.1 2002-11-29 > > 5.0 H.225.0 2003-07-14
In version 2, type Progess-UUIE is defined as follows:
> Progress-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,
> }But from version 3 onwards, it is defined as:
Progress-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
}
Ken,
we are checking with the Rapporteur of ITU-T Rec. H.225.0 to understand why this non-compatible change was applied. I'll get back to you as soon as I get an answer.
--
Olivier DUBUISSON
france telecom R&D
DTL/TAL - 22307 Lannion Cedex - France t: +33 2 96 05 38 50 - f: +33 2 96 05 39 45 - http://asn1.elibel.tm.fr/
