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

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@192.168.0.81:5060 Restore previous codec PCMU:0.