[asterisk-users] FXO Cards - T38

Fernando Berretta fernando.berretta at gmail.com
Tue Feb 26 08:07:26 CST 2008


Thanks for clarify.. so Asterisk will be able to receive faxes which 
comes from a Gateway using t38 but will not be able to relay faxes which 
comes from PSTN through a FXO card to other Gateway using t38

can this version of app_fax be used with Asterisk 1.4x ?


Steve Underwood wrote:
> zoa wrote:
>   
>> T.38 will not work with the fxo card.
>>
>> Zoa
>>   
>>     
> That statement is a bit vague. What has been put in add-ons so far is 
> only support for T.38 termination. Not T.38 gateway operation.
>
> Steve
>
>   
>> Fernando Berretta wrote:
>>   
>>     
>>> Dear All,
>>>
>>> Are you telling me Asterisk 1.6.0b2/4 has support for t38 and rxfax 
>>> etc. and will be able to receive faxes and negotiate with voip CPE's 
>>> like ATA's to transmit faxes which comes from FXO cards to VoIP 
>>> Devices using T38 ? it is possible to compile this version of app_fax 
>>> to work with Asterisk 1.4x ? Someone has tried it ?
>>>
>>> Best Regards,
>>> Fernando
>>>
>>> Thomas Kenyon wrote:
>>>     
>>>       
>>>> Steve Underwood wrote:
>>>>   
>>>>       
>>>>         
>>>>>>   
>>>>>>       
>>>>>>           
>>>>>>             
>>>>> I thought * was still not capable for T.38 gateway operation. Doesn't 
>>>>> beta 4 just added T.38 termination? And, I believe it misses out some 
>>>>> key elements of doing that properly. Note that T.38 termination is an 
>>>>> addon, so it can't be used with, say, G.729.
>>>>>     
>>>>>         
>>>>>           
>>>>>> The only real option available at the moment is to keep one PSTN line on 
>>>>>> an ATA with an FXO port and T.38 support available and direct calls from 
>>>>>> the fax machines through to it.  However, I should point out that while 
>>>>>> I believe this should be possible, I haven't actually tried it myself.
>>>>>>
>>>>>>   
>>>>>>       
>>>>>>           
>>>>>>             
>>>> The new asterisk T.38 functionality is from the Asterisk addons 1.6.0b2 
>>>> version of app_fax (and a few small changes in 1.6.0b4), which I thought 
>>>> someone would have mentioned to you, since it does use spandsp.
>>>>
>>>> (Or at least the configure script checks for spandsp, I haven't actually 
>>>> looked at the code).
>>>>
>>>>       
>>>>         
>
>
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