I stumbled across a draft rfc for IAX2 at: http://www.eguy.org/presentations/2006/draft-guy-iax-01.html#sec.new It describes all the IAX2 'information elements' sent when a new call is established. Here's the list. http://www.eguy.org/presentations/2006/draft-guy-iax-01.html#sec.new When I issue a 'iax2 debug', I don't see all of the variables that are sent with a NEW request. The one I am tracking down is RDNIS. Why isn't it there? Doug.