Giles, I do not think this is an error or a problem in any sense as the bits that are transmitted are not changed. The reason for the change is as follows. Up to and including version 10, I, as editor of H.245, have maintained my own version of the recommendation, and as each version has been approved, I have submitted it to the ITU-T TSB for publication. They then made editorial changes to it to align the look and feel of it to the ITU-T template. Each time I gave them a new version, they would have to make similar changes. Due to the rapid approval of new versions, 10 versions in 10 years, the ITU-T publication process was continually a little behind. But by version 11 they had caught up, and the decision was made for future (including version 11) editor's drafts to be based on the previous ITU-T published version. Hence various changes to spelling and style have been made between the editor's drafts of version 10 and 11 - you have found one of them. Hopefully none of the differences are significant - a lot of effort went into verifying this. Anyone looking at the published versions would not have seen any such changes between versions 10 and 11 - they would only see the intended technical enhancements. I hope this clarifies the situation. Best regards Mike Nilsson Mike Nilsson Multimedia Analysis and Coding ___________________________ Sirius House (B54-MH), Room 124 Adastral Park, Martlesham Heath, Ipswich, IP5 3RE, UK Tel: +44 1473 645413 Mobile: +44 7917 025433 Fax: +44 1908 862365 Email: mike.nilsson@bt.com BT Group plc Registered office: 81 Newgate Street London EC1A 7AJ Registered in England and Wales no. 4190816 This electronic message contains information from BT Group plc which may be privileged or confidential. The information is intended to be for the use of the individual(s) or entity named above. If you are not the intended recipient be aware that any disclosure, copying, distribution or use of the contents of this information is prohibited. If you have received this electronic message in error, please notify us by telephone or email (to the numbers or address above) immediately. Activity and use of the BT Group plc E-mail system is monitored to secure its effective operation and for other lawful business purposes. Communications using this system will also be monitored and may be recorded to secure effective operation and for other lawful business purposes. -----Original Message----- From: Giles Chamberlin [mailto:giles.chamberlin@tandberg.net] Sent: 11 July 2005 15:52 To: itu-sg16@external.cisco.com Subject: ASN problem in H.245v11 Latest H.245v11 document (H245WCM28.doc) obtained from packetizer.com (http://www.packetizer.com/voip/h245/Version11/H245WCM28.zip) has an error in the asn.1 definition: GenericMessage ::=SEQUENCE { messageIdentifier CapabilityIdentifier, subMessageIdentifier INTEGER(0..127) OPTIONAL, messageContent SEQUENCE OF GenericParameter OPTIONAL, ... } subMessageIdentifier appears to have been spellchecked and is now different to previous versions. (It was subMessageIdentifer in v10). Giles Chamberlin