Hi, you would need to take full packet capture (SIP and RTP) and study it in wire-shark to see the difference between working / non-working scenarios.

    
On 16-05-12 08:13 AM, Stefan Kainz
      wrote:

    

    

      
      Hello, 

      

      i've a quick question. 

      Are there any known issues when faxing from asterisk to freeswitch
      using T.38? 

      FS Version 1.6.8 git / Asterisk 13.8.2. 

      

      We're trying very hard getting this to work, but it just wont. 

      Everything else fax-related seems to be working very well, but in
      that case we keep getting 

      result (3) Timed out waiting for the first message.

      When using Version FS 1.2 this problem doesnt seem to exist.

      

      The setup is as following: 

      

      ATA ( cisco spa ) -> Asterisk -> Freeswitch1.6.8 ( rxfax )

      

      regards,

      

      

      

      
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