It is now 13 September. I have received three mails supporting this proposed
change, and no mails against it. I think that we can conclude that we have
consensus to make the change.
Another purely editorial error has been pointed out to me by Hidenobu
Harasaki. The words 'defined in section 6' appear in 18 places, but there is
no section 6 as this has been renamed to be Annex C. So the 18 occurences of
'defined in section 6' should be changed to 'defined in Annex C'. He also
pointed out that this error was also present in the version 4 that I
submitted to the ITU.
Best regards
Mike Nilsson
**********************************************************************
* Mike Nilsson Tel: +44 1473 645413 *
* Applications Technology Group Fax: +44 1473 645011 *
* Internet and Multimedia Applications Email: mike.nilsson@bt.com *
* BT Advanced Communications Technology Centre [B54 Room 94] *
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-----Original Message-----
From: Nilsson,ME,Mike,NZA5 R
Sent: Tuesday, August 31, 1999 10:24 AM
To: 'SG16'; 'LBC'; 'H323 Implementors'; 'PotsAG'
Cc: 'Greg Jones'
Subject: ASN.1 Syntax of H.245
An error has been found in the ASN.1 syntax of H.245 version 5. Thanks to
Jaakko Helanti and Paul Long for identifying it.
The error occurs in the section given below where the word 'OPTIONAL'
should appear at the end of the line 'genericModeParameters
GenericCapability'. This was an editorial error, but one that has some
technical consequence. Although the absence of the word 'OPTIONAL' does
not change the understanding of bits received by a decoder, it does demand
that an encoder always send the information 'genericModeParameters'. This
was not the intention and is not desirable.
ModeElement ::= SEQUENCE
{
type CHOICE
{
nonStandard NonStandardParameter,
videoMode VideoMode,
audioMode AudioMode,
dataMode DataMode,
encryptionMode EncryptionMode,
...,
h235Mode H235Mode
},
h223ModeParameters H223ModeParameters OPTIONAL,
...,
v76ModeParameters V76ModeParameters OPTIONAL,
h2250ModeParameters H2250ModeParameters OPTIONAL,
genericModeParameters GenericCapability
}
I have contacted the ITU regarding this. Their response was that if there
is consensus, as determined by e-mail, then as version 5 (05/99) of H.245
has not yet been published, it will be possible to correct this error
before publication.
I hope that two weeks will be enough time for everyone to consider this
issue, and so aim to respond to the ITU on 13 September about whether we
have achieved consensus to make this correction.
Best regards
Mike Nilsson
**********************************************************************
* Mike Nilsson Tel: +44 1473 645413 *
* Applications Technology Group Fax: +44 1473 645011 *
* Internet and Multimedia Applications Email: mike.nilsson@bt.com *
* BT Advanced Communications Technology Centre [B54 Room 94] *
* Adastral Park *
* Martlesham Heath *
* Ipswich IP5 3RE *
* UK *
**********************************************************************