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] * * Adastral Park * * Martlesham Heath * * Ipswich IP5 3RE * * UK * **********************************************************************

-----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

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• 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 *

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