route the call to the info app to test out all the things you can use in the regex. <action application="info"/> anything you see that starts with variable_ is available as a variable so variable_sip_from_domain: cool.com can be accessed as ${sip_from_domain} There is for sure some stuff in there that will tell you. Any variable is valid in the field attr of a condition ex. <condition field="${sip_from_domain}" expression="cool.com"/> also you can use the function sofia_contact to do a regex on the contact addr of the registered user ${sofia_contact(1000@xyz.com)} Much of this should be documented in the default configs in tree and on the wiki http://wiki.freeswitch.org/wiki/Mod_dialplan_xml On Sat, Aug 23, 2008 at 2:28 AM, Juan Backson <juanbackson@gmail.com> wrote:

Hi,

Is there anyway that I can tell if one of either leg A or leg B is a client behind NAT? I would like to find a way to do that in order to dynamically determine whether bypass_media or proxy_media should be used.

Thanks, JB

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