[Freeswitch-users] Sending Fax problem

hello, i am trying to send fax via PSTN by VOIP gateway original way: originate sofia/gateway/<voip gateway>/12345678 &txfax(/path_to_fax_file) but i must set up my gateway as "Call a user as a gateway" i set VOIP gateway to user 9999, and i want to fax a document to 12345678 (pstn number) but how can i input the fax number? i cant find a place to input pstn number, thank you like: originate user/9999 &txfax(/path_to_fax_file) -- Best regards, Ted