You can look at H.225 specs and a definition of GloballyUniqueID. The originating GW either generates a new CID with its MAC address or uses the CID specified by the calling endpoint. ----- Original Message ----- From: <kompnet@aaanet.ru> Sent: Thursday, December 18, 2003 11:23 AM do you know comlete algorithm of CallID forming? Or do you know, from where does orig GW know correspondent's MAC? Or does CISCO corp. know and remember about this rules? (Situations like this I saw very many times, and firstly was surprised too). ------------------------------------------------------- This SF.net email is sponsored by: IBM Linux Tutorials. Become an expert in LINUX or just sharpen your skills. Sign up for IBM's Free Linux Tutorials. Learn everything from the bash shell to sys admin. Click now! http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click _______________________________________________ List: Openh323gk-users@lists.sourceforge.net Archive: http://sourceforge.net/mailarchive/forum.php?forum_id=8549 Homepage: http://www.gnugk.org/