[asterisk-users] Fwd: Re: Asterisk T.38 Pass-Through doesn't work

[Larry Moore]

On 22/07/2013 10:19 PM, Larry Moore wrote:
> On 22/07/2013 5:40 AM, Zoltán Fekete wrote:
>>
>> Hi!
>>
>> I have exactly the same problem on asterisk 1.8.22.0  and also on
>> separate 11.2.1 when sending fax to PSTN.
>> Tryed with spa-3102, spa-2102, Patton Smartnode 4634, and Zoiper
>> softphone.
>> SpanDsp also works without any problem on my box.
>>
>> As I remember it was a bug in 1.8.1.x that the a=T38MaxBitRate paramater
>> was sent as "maxBitRate". Without capital "M".
>>
>> Are you closer to the solution?
>> I have tryed almost anything and I don't understand why sends the
>> T38MaxBitRate:2400 parameter.
>>
>
> Could it be because the remote endpoint does not supply the
> T38MaxBitRate attribute in its reply which then leads to Asterisk
> applying the Minimum Rate to your ATA!?
>
> I am referring to the information around lines 403 & 404 of
> https://gist.github.com/anonymous/5701207.
>
> Do you know what the Fax Rate was for the connection in
> https://gist.github.com/anonymous/5701150.
>
> What happens if you insert in your dialplan something like
>
> Set(FAXOPT(minrate)=4800)
>

Another suggestion might be to set the variable in the peer 
configuration like;

setvar=FAXOPT(minrate)=4800


Larry.