[asterisk-users] t38 ATA

[Klaus Darilion]

Am 12.03.2010 18:01, schrieb Steve Underwood:
> On 03/13/2010 12:00 AM, Alexandru Oniciuc wrote:
>>
>> Hello,
>>
>> I need a hand in choosing a small ATA, even with one FXS port, that
>> should do only fax with T38.
>>
>> I’ve tried Grandstream (ht286 model) but the faxes go out without ECM,
>> even if the Fax machine has ECM enabled.
>>
>> Is there anyone that can recommend an ATA that might do the trick?
>>
>> Thanks,
>>
>> Alex
>>
> The Grandstreams do T.38 quite well, and they do support ECM. It is
> probably your service provider which is blocking ECM. Many of them do.
>
> People complain a lot about Grandstream, but its mostly their phones.
> Their ATA are amongst the better ones. Sadly, that doesn't mean an awful
> lot, as most ATAs are quite nasty.

Hi Steve!

I have a similar problem with Linksys ATA against Asterisk in T.38 
gateway mode (patch from bugtracker) - and I do not know if the problem 
is in the ATA or in Asterisk.

How is ECM/non-ECM mode indicated? Is it in SDP (which parameter?) or 
during T.30 handshake?

thanks
klaus

>
> Steve
>
>