Guys Just a quick note H.460.18/19 client support has now been added to h323plus. The source code and a very basic sample app have been added to the extensions/h460 directory in the CVS http://h323plus.cvs.sourceforge.net/h323plus/extensions/h460/h460.18/ It compiles with h323plus v1.20.1 available from the h323plus website and has been tested against Tandberg gatekeepers. Both GnuGk (default) and H.460.18/19 NAT methods work without conflict so you should be able to support both the standard H.460.18/19 and the GnuGk methods in your applications without any problems. Simon