I am trying to send fax from freeswitch on Ubuntu 14.10 to kapanga on Windows 7 in the same LAN. The command I am using on fs console is: originate {ignore_early_media=true,fax_verbose=true,fax_enable_t38=true,fax_enable_t38_request=true}user/1003 &txfax(/tmp/txfax.tif) I can receive the fax from kapanga using rxfax. The complete error log is at pastebin https://pastebin.freeswitch.org/24095 <https://pastebin.freeswitch.org/24095> And here are some snippets from log 2015-04-10 15:44:32.135053 [DEBUG] mod_spandsp_fax.c:286 FLOW T.30 T0 expired in state T 2015-04-10 15:44:32.135053 [DEBUG] mod_spandsp_fax.c:286 FLOW T.30 Status changing to 'Timed out waiting for initial communication' 2015-04-10 15:44:32.135053 [DEBUG] mod_spandsp_fax.c:506 ============================================================================== 2015-04-10 15:44:32.135053 [DEBUG] mod_spandsp_fax.c:518 Fax processing not successful - result (2) Timed out waiting for initial communication. 2015-04-10 15:44:32.135053 [DEBUG] mod_spandsp_fax.c:523 Remote station id: 2015-04-10 15:44:32.135053 [DEBUG] mod_spandsp_fax.c:524 Local station id: SpanDSP Fax Ident 2015-04-10 15:44:32.135053 [DEBUG] mod_spandsp_fax.c:525 Pages transferred: 0 2015-04-10 15:44:32.135053 [DEBUG] mod_spandsp_fax.c:527 Total fax pages: 0 2015-04-10 15:44:32.135053 [DEBUG] mod_spandsp_fax.c:528 Image resolution: 0x0 2015-04-10 15:44:32.135053 [DEBUG] mod_spandsp_fax.c:529 Transfer Rate: 14400 2015-04-10 15:44:32.135053 [DEBUG] mod_spandsp_fax.c:531 ECM status off 2015-04-10 15:44:32.135053 [DEBUG] mod_spandsp_fax.c:532 remote country: 2015-04-10 15:44:32.135053 [DEBUG] mod_spandsp_fax.c:533 remote vendor: 2015-04-10 15:44:32.135053 [DEBUG] mod_spandsp_fax.c:534 remote model: 2015-04-10 15:44:32.135053 [DEBUG] mod_spandsp_fax.c:536 ============================================================================== 2015-04-10 15:44:32.135053 [DEBUG] mod_spandsp_fax.c:286 FLOW T.30 Changing from state T to CALL_FINISHED 2015-04-10 15:44:32.135053 [DEBUG] mod_spandsp_fax.c:286 FLOW T.30 Changing from phase A_CNG to CALL_FINISHED 2015-04-10 15:44:32.135053 [DEBUG] mod_spandsp_fax.c:286 FLOW T.38T Set rx type 9 2015-04-10 15:44:32.135053 [DEBUG] mod_spandsp_fax.c:286 FLOW T.38T Set tx type 9 2015-04-10 15:44:32.135053 [DEBUG] mod_spandsp_fax.c:286 FLOW T.38T FAX exchange complete 2015-04-10 15:44:32.135053 [DEBUG] mod_spandsp_fax.c:286 FLOW T.30 Call completed 2015-04-10 15:44:32.135053 [DEBUG] switch_core_codec.c:246 sofia/internal/1003@192.168.0.81 <mailto:sofia/internal/1003@192.168.0.81>:5060 Restore previous codec PCMU:0.