Hi, I am trying to upgrade from a half year olf FS version to the latest one and face some problems with fax. The fax arrives from the PSTN through an Audiocodes MSBG-1,000 gateway. With the old version, when I have mod_fax loaded, FS detects that this is a fax call, sends a re-INVITE to the MSBG and enters T.38 mode; this works ok. With the old version, when mod_fax is *unloaded*, FS enters T.38 mode *without *sending re-INVITE, thus the fax fails. The latest FS version (where mod_fax is not available anymore) works as the second situation above and fax fails. I guess I am missing something in the configs, but I can't find what... I have in my dialplan: <action application="set" data="fax_enable_t38_request=true"/> <action application="set" data="fax_enable_t38=true"/> and I've also tried to add: <action application="set" data="execute_on_answer_6=t38_gateway self"/> but nothing helps. Any idea what I am doing wrong? Thanks! __Yehavi: