Re: Can't send Fax but can Receive

FM,

Does your provider support T.38? If so, Asterisk can be configured as a
T.38 gateway. You may want to try that.

--
Nabeel Jafferali

On Thu, Oct 5, 2017 at 12:42 PM, Lee Howard <[email protected]> wrote:

> On 10/05/2017 05:25 AM, FM wrote:
>
>> My ISP is at the same time My VOIP provider. I use a sip trunk for voice
>> + fax. I use ullaw and allaw as codecs.
>>
>> The strange thing is, some months ago I was able to send fax with no
>> problem.
>>
>
> That is not strange at all.  VoIP jitter is a variable depending on so
> many things.  So, that it was better before and is worse now is not unusual
> for VoIP.  Chances are that in a week or two or a day or two it will be
> even worse or better.
>
> By the way, if I send fax to a number that also is a virtual fax with
>> hylafax + iax2 extension it Never fails.
>>
>
> So, that tells you that the call audio quality on that call path is better
> than the others.  Still, it doesn't really help you resolve the problem
> with the other calls.
>
> With this info, is there anything I could test to solve the problem?
>>
>
> No. There is no way for you to solve the problem directly.  As I already
> said before, you will have to work with your service provider to remedy the
> problem.  (And, even then, they may have only a limited control on the
> factors involved.)
>
>
> Thanks,
>
> Lee.
>
>
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