Hi,guys. This is sammy. Here i met some problem in T.38 fax test on new module: mod_spandsp(based on the latest src) When simulate one T.38 fax receive process with sipP as below: 1) 1000 calls to 666666, and call is established. 666666 is one extension in public.xml <extension name="666666"> <condition field="destination_number" expression="^(666666)$"> <action application="answer" /> <action application="playback" data="silence_stream://2000"/> <action application="rxfax" data="/tmp/999.tiff"/> <action application="hangup"/> </condition> </extension> 2) 666666 send re-INVITE to 1000 with T.38 SDP. Here re-INVITE retrys 5 times, and FS return " Fax processing not successful - result (48) Disconnected after permitted retries. " i print some logs for libs/spandsp T.30 handle, found in function t30::repeat_last_command(), t30_state_t->state is T30_STATE_R(17) , so FS return " Disconnected after permitted retries ". Does anyone know the reason? Where is the span_log of spandsp lib ? i cannt find it... regards sammy