Wu, thanks for your good observation. I read the two paragraphs together in conjunction with chapter 7 and can indeed agree with you that there is a mismatch. As a resolution, I will prepare a proposal for the H.323 Implementors Guide that recommends to delete the incorrect "logical", as shown below. Assuming that the connection procedures in the previous clause (Connection establishment procedures) indicate a secure mode of operation, the negotiated handshake and authentication shall occur for the H.245 channel before any other H.245 messages are exchanged. If negotiated, any exchange of certificates shall occur using any mechanism appropriate for the H-Series terminal(s). After completing the securing of the H.245 channel, the terminals use the H.245 protocol in the same manner that they would in an insecure mode. With kind regards Martin Euchner. ----------------------------------------------------------------------- | Dipl.-Inf. Rapporteur Q.G/SG16 | Martin Euchner Phone: +49 89 722 55790 | Siemens AG.....................Fax : +49 89 722 47713 | ICN M SR 3 mailto:Martin.Euchner@icn.siemens.de | mailto:martin.euchner@ties.itu.int | Hofmannstr. 51 Intranet: http://intranet.icn.siemens.de/marketing/cs27/topics/security/ | D-81359 Muenchen Internet: http://www.siemens.de/ | __________________ | Germany ----------------------------------------------------------------------- -----Original Message----- From: wu.yongming@ZTE.COM.CN [mailto:wu.yongming@ZTE.COM.CN] Sent: Friday, April 26, 2002 5:15 AM To: ITU-SG16@echo.jf.INTEL.COM Subject: h235v2 hi,all experts is the following i marked by <<<>>> a error? i think it should possibly be H.245 control channe. 8.1 Secure H.245 channel operation Assuming that the connection procedures in the previous clause (Connection establishment procedures) indicate a secure mode of operation, the negotiated handshake and authentication shall occur for the <<<H.245 logical channel>>> before any other H.245 messages are exchanged. If negotiated, any exchange of certificates shall occur using any mechanism appropriate for the H-Series terminal(s). After completing the securing of the H.245 channel, the terminals use the H.245 protocol in the same manner that they would in an insecure mode. special to paul,because i am not sure this mail can get to the maillist,so i have send a copy to your address.if it is a trouble,please forgive me about that. regards, wu.y.m