Hi List, After some researches, I didn't have found how to remove the X-FS-Support of SIP INVITES sent by Freeswitch. *Example : X-FS-Support: update_display,send_info* I've tried modifying "ignore_display_updates" variable, as described here : http://wiki.freeswitch.org/wiki/Variable_ignore_display_updates, and modifying "pass_callee_id" variable (even if I doubt about it...) without any success. Have you got any other idea ? It's important for us to be able to suppress this header, because of our SIP provider SBC, which doesn't support it... Thanks a lot, * Bien cordialement, Best Regards, **Kevin MATHY* * * --