[asterisk-users] T.38 pass-through 488 handling problem

[Atis Lezdins]

On Mon, Jun 8, 2009 at 7:00 PM, Klaus
Darilion<klaus.mailinglists at pernau.at> wrote:
>
>
> Atis Lezdins schrieb:
>> On Mon, Jun 8, 2009 at 2:06 PM, Klaus
>> Darilion<klaus.mailinglists at pernau.at> wrote:
>>> Hi!
>>>
>>> I have the following problem with Asterisk 1.4.23:
>>>
>>>
>>> ATA w/ T.38             Asterisk          ATA w/o T.38
>>>     --------INVITE-------->
>>>                             --------INVITE-------->
>>>                             <-------200OK----------
>>>     <-------200OK----------
>>>     --------ACK----------->
>>>                             --------ACK----------->
>>>
>>>
>>>     --------INVITE w/T.38->
>>>                             ------INVITE w/ T.38-->
>>>                             <-----488--------------
>>>                             ------ACK------------->
>>>                             ------BYE------------->
>>>                             <-----200--------------
>>>
>>> Asterisk does not forward the 488 back to the caller, but hangs up the
>>> callee's call leg. Further, the caller's call leg will not be hung up.
>>>
>>> Is somebody aware of this problem and a fix?
>>>
>>
>> T.38 passthrough is possible if BOTH devices support T.38, so Asterisk
>> don't have to transcode anything.
>>
>> You could try 1.6 with some gateway app (don't remember if there
>> exists any and in what state), or just write a RxFax which would then
>> generate call with TxFax.
>
> That's not the problem. Asterisk should just relay back the 488 so that
> Faxing happens with g.711.
>

Ok, then You have to look into headers and log, Asterisk should say something..

Regards,
Atis


-- 
Atis Lezdins,
VoIP Project Manager / Developer,
IQ Labs Inc,
atis at iq-labs.net
Skype: atis.lezdins
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