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