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...search. What you should have found out by now (or perhaps deduced) is that the T.38 is a standard that is varied thus one cannot be assured a T.38 solution will always work. > exten => _00., 1, NoOp() > same => n, Set(FAXOPT(gateway)=yes) > same => n, Dial(SIP/${EXTEN}@27XgY8YwfI2S9NAg) > same => n, Hangup() > > The problem vanished when I changed that to: > > exten => _00., 1, NoOp() > same => n, Answer() > same => n, Progress() > same => n, Set(FAXOPT(gateway)=yes) > same => n, Dial(SIP/${EXTEN}@27XgY8YwfI2S9NAg)...

...error, and I could solve that specific problem. Obviously, the dialplan application "Answer" was playing a key role here. My original dialplan snippet (which produced that problem) was: exten => _00., 1, NoOp() same => n, Set(FAXOPT(gateway)=yes) same => n, Dial(SIP/${EXTEN}@27XgY8YwfI2S9NAg) same => n, Hangup() The problem vanished when I changed that to: exten => _00., 1, NoOp() same => n, Answer() same => n, Progress() same => n, Set(FAXOPT(gateway)=yes) same => n, Dial(SIP/${EXTEN}@27XgY8YwfI2S9NAg) same => n, Hangup() However, I got another prob...

...solution which works with every provider around the world. >> >>>> exten => _00., 1, NoOp() >>>> same => n, Answer() >>>> same => n, Progress() >>>> same => n, Set(FAXOPT(gateway)=yes) >>>> same => n, Dial(SIP/${EXTEN}@27XgY8YwfI2S9NAg) >>>> same => n, Hangup() >>> >>> One may assume this is your dialplan for the outgoing connection with >>> which you want T.38 to be supported. >> >> You are right. >> >>> To obtain better assistance you will need to include info...

Dear all, I have the following situation: Local T.38 endpoint <-> ASTERISK <-> SIP provider (with T.38 support) I am trying to send a fax from my local T.38 endpoint to arbitrary external fax numbers (which I am not in control of, so I don't know if the other end supports T.38, is connected to a PBX, who is their provider, and so on), of course trying to use T.38 at least from