I figured this out - but many others would have given up.. I needed to answer incoming calls on a FXO port. From the wiki page http://wiki.freeswitch.org/wiki/FreeTDM There are several places where there is a data="freetdm/1/1/${destination_number} bit, but I'm not understanding the syntax of /1/1/ bit means? I think it is supposed to mean freetdm/span#/port#/ What makes the span# what it is ( the order in freetdm.conf or the name of the span? ) The port number corresponds to the defined channel number? (if so why two names? ) At a different place in the wiki there is expression="FreeTDM/1/[34]" This time there is a different capitalization for the word freetdm (with meaning?)- and the square brackets might mean the port number applies only to this leg? I did get it working with this extension: <extension name="fxo3"> <!-- <condition field="destination_number" expression="^.+$"> --> <condition field="chan_name" expression="FreeTDM/2:1/" > <!-- <action application="set" data="destination_number=11" /> --> <action application="set" data="domain_name=$${domain}"/> <action application="transfer" data="11 XML default" /> </condition> </extension> I'm guessing that the 2:1 means the second span in freetdm.conf and the first extension of that span? (Now that is rather cryptic - even for this aging assembly programmer ) There is nothing like that on the wiki page - What in the world am I missing? BTW I would think that the way this SHOULD work would be as in: data="freetdm/FXO/3/${destination_number} freetdm.conf - spans : ;Digium, Inc. Wildcard AEX410 4-port analog card (PCI-Express) [span zt FXS] trunk_type => FXS fxs-channel => 1 fxs-channel => 2 [span zt FXO] trunk_type => FXO fxo-channel => 3 fxo-channel => 4 Give me some clear answers and I can write this up for others. -------------------------------------------------------------------------------- Karl Schmidt EMail Karl@xtronics.com Transtronics, Inc. WEB http://secure.transtronics.com 3209 West 9th Street Ph (785) 841-3089 Lawrence, KS 66049 FAX (785) 841-0434 If one rejects laissez faire on account of mans fallibility and moral weakness, one must for the same reason also reject every kind of government action. Ludwig von Mises --------------------------------------------------------------------------------