Am 12.03.2010 19:05, schrieb Alexandru Oniciuc:
Hi Steve,
the remote device is an Hylafax Server that does ECM.
How is Hylafax connected to VoIP?
regards
Klaus
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.
It would be interesting how the T.38 SDP differs between Grandstream and
Patton.
regards
klaus
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-boun...@lists.digium.com
[asterisk-users-boun...@lists.digium.com] per conto di Steve
Underwood [ste...@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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