I cannot help you - I think most vedors support this mechanism. Be aware that Facility-IE is not the same as UU-IE, so you can have Facility message with zero length Facility-IE and non-zero UU-IE with the alternativeAliasAddress field supplied. Regards, Michal ----- Original Message ----- From: "dirk los" <dirk@luna.nl> Sent: Wednesday, November 26, 2003 1:31 AM > Thanks for pointing me to the H.225 section 7.4.1. > However I am afraid that that part is not sufficient. > I am interested in the H.323 stuff and I am concerned about clear > specifications of implemented functionality, otherwise a lot of lost energy > in interoperability problem solving can be expected. Hereafter I explain > why I think that this is the case: > > I quote from table 14 in section 7.4.1 in the H.225 spec: > > NOTE - If the Facility message is used for carrying Q.95x supplementary > service signalling, one of either the Facility or Extended Facility > information elements is required. If the Facility message is used for > Supplementary Service control according to H.450.x-series Recommendations, > or if the Facility message is used for the reroute to MC/GK functions, then > the zero-length Facility information element is required. > > and further: > The user-to-user information element contains the Facility-UUIE defined in > the H.225.0 Message Syntax. The Facility-UUIE includes the following: > ....... > alternativeAliasAddress - Contains aliases that can be used to re-direct > the call; if an alias is provided, alternativeAddress is not needed. > As you can see the AlternativeAliasAddress is an element in an > Facility-UUIE, which is not the same as the Facility-IE. > Further you can see that the Facility-UUIE is only used in case of H.450 > and reroute to MC/GK functions. > So..I am afraid that the implementation isn't specified clearly and the > only non H.450 implementations would have to implement Q.95x signaling in > the Facility-IE and Extended Facility-IE. ------------------------------------------------------- This SF.net email is sponsored by: SF.net Giveback Program. Does SourceForge.net help you be more productive? Does it help you create better code? SHARE THE LOVE, and help us help YOU! Click Here: http://sourceforge.net/donate/ _______________________________________________ List: Openh323gk-users@lists.sourceforge.net Archive: http://sourceforge.net/mailarchive/forum.php?forum_id=8549 Homepage: http://www.gnugk.org/
