[asterisk-users] R: t38 ATA

[Alexandru Oniciuc]

Hi Steve,

the remote device is an Hylafax Server that does ECM. The sending fax device, that's attached to the ATA, is a Philips fax machine with ECM enabled. If I send with the same machine but attached to a Patton 4114 with T38 enabled my faxes go to the other end with ECM enabled and with no errors.

I've also tested the Grandstream ATA with analog fax machines attached to the PSTN and the results are the same: bad quality faxes or no faxes at all. Again, tested with the Patton device I get no errors.

In this case I think it's the Grandstream.

Best Regards,
Alex

________________________________________
Da: asterisk-users-bounces at lists.digium.com [asterisk-users-bounces at lists.digium.com] per conto di Steve Underwood [steveu at coppice.org]
Inviato: venerdì 12 marzo 2010 18.01
A: Asterisk Users Mailing List - Non-Commercial Discussion
Oggetto: Re: [asterisk-users] t38 ATA

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.

Steve


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