[Freeswitch-users] Fax processing not successful - result (35) Unexpected DCN while waiting for DCS or DIS.

Dear users, I am new to freeswitch and i am try to learn fax to email. but i am getting sometime this error and i am fail to received fax. I try to set below parameter for fax service. <action application="set" data="fax_enable_t38=true"/><!-- Enable t.38 for this call --> <action application="set" data="fax_enable_t38_request=true"/> i try to search solution for this problem and couldn’t found solution. Can anyone guide. Thank Amit Nakum