Hi,
some devices reject the OLC of extended channel if the sessionid is 0(default), with (OLC reject) invalidsessionid.
This is defined in file h323caps.cxx, OnH239GenericMessageResponse as defaultSession=0,
after changing the value to 3. the OLC is accepted.

In the attached mail-list discussion it is mentioned that sessionid should not be 0 (http://lists.packetizer.com/pipermail/h323plus/2009-December/002105.html).

h323plus displays forgiving nature in this case. it happily accepts a sessionid of 0 in an extended channel.

please advise on this behaviour.