[Asterisk-Users] Fax over IP doesn't works

[Miroslav Nachev]

   Dear Steve,

   I can't understand from your mail can I use SpanDSP or not?

   Today we try this fax-modem:
   http://www.openh323.org/t38.html
   The problem now is that we can't start it with HylaFAX.
   

   Best Regards,
   Miroslav Nachev

SU> Hi Miroslav,

SU> It sounds like you don't really understand what T.38 is. You need some
SU> form of modem to get from a normal FAX machine to a T.38 channel. 
SU> spandsp can do that. A normal FAX modem can do that. You need a modem
SU> somewhere, though. That is why developing the FAX modems was the first
SU> step towards providing T.38.

SU> Regrds,
SU> Steve


SU> Miroslav Nachev wrote:

>>   Dear Steve,
>>
>>SU> So how does the FAX get from the fax machine to the T.38 channel
>>SU> with spandsp?
>>
>>   In our case we will try to strip spandsp and will use directly
>>OpenH323. We do tests for compatibility with one of the biggest
>>national telecom and if they are OK, they will offer Asterisk based IP
>>PBX to their clients instead Cisco. That's why we need of T.38 and
>>G.711 fax capabilities.
>>   Also we have the problems with the following tests:
>>   1. When Dialing of unallocated number the resposne must be "Invalid
>>      Number", but the result is one of the following: Hangup,
>>      Congestion or Busy.
>>   2. CLIP/CLIR User provided verified and passed - We can't find
>>      where we can set this bits for this services.
>>   3. Fax T38 / g711
>>   4. Codec negotiation: when 2 codecs are possible (G.711 and G.729),
>>      the two parties can't negotiate which codec to use.
>>
>>
>>   Best Regards,
>>   Miroslav Nachev
>>
>>   
>>Miroslav Nachev wrote:
>>
>>  
>>
>>>SU> and exactly how does that get the FAX into the T.38 channel? :-\
>>>
>>>  Using G.711 or implementing T.38 in Asterisk or adjusting Asterisk
>>>to OpenH323 T.38. From our expirience Asterisk detect that the line is
>>>with Fax data. The problem is what next.
>>>
>>> 
>>>
>>>    
>>>
>>So how does the FAX get from the fax machine to the T.38 channel with
>>spandsp?
>>
>>Regards,
>>Steve
>>
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