I have so far found 2 ATA's that seem to be able to handle FAX reasonably
well. The first one is the Grandstream ATA-286 (firmware up to 1.0.6.7,
have not tried any firmware later than this), I have used these at multiple
customer sites and no one has ever reported problems. They handle G3 faxing
ok. Where I work we also use an analog modem connected to one and we get
reliable 42k connects. On the asterisk side of things we use PRI (TE110p,
TE410p, TE210p). The grtandstreams are plug and go, just disable the t.38
support.
The other ATA that I have found to be able to perform faxing is the Linksys
PAP2NA, however the configuration is more complex and it doesn't seem to
handle G3 or analog modems. I'd recommend the Grandstream as your best
chance of successful faxing in an asterisk setting where asterisk has an
ISDN connection to the PSTN.
Craig
----- Original Message -----
From: "Steve Underwood" <[EMAIL PROTECTED]>
To: "Asterisk Users Mailing List - Non-Commercial Discussion"
<[email protected]>
Sent: Sunday, April 16, 2006 10:11 AM
Subject: Re: [Asterisk-Users] Digium cards, so disappointing !
Remco Barende wrote:
Hmm not so sure of that. I have an HP all-in-one thingy. It is not
possible to set the TX/RX speed hard in the config at a certain speed.
Through the developers menu in the beast it is possible to do this
temporary.
Faxing at max 9600 bps works, anything higher fails miserably after the
second or third page.....
This doesn't make sense. The known problems are all timing related, and
9600 (I presume you mean V.29 at 9600) is no more or less sensitive to
timing slips than V.17. Actually, on a poor line V.17 at 9600bps should
perform considerably better than V.29 at 9600bps. Can you tell me your
exact setup? There must be something else wrong.
I tried lots of different settings but none really seemed to help.
The line is ISDN BRI with an HFC-S card. Software is bristuff with florz
patch. Echo can, silence suppr. etc all disabled.
The HP is connected to a Sipura SPA 2000 with the correct settings for
fax and the region i'm in. Still consistently faxes fail after the first
or second page. The HP is a LaserJet 3330 mfp.
Setting it back 9600 did help a bit.
I solved the problem now by connecting an old Digital -> Analog converter
to the BRI line, bypassing Asterisk.
The Sipura is probably the problem. FoIP doesn't generally work for a
number of reasons. Packet loss and jitter are just two of them. See
http://www.soft-switch.org/foip.html and
http://www.soft-switch.org/foip-with-real-atas.html for some others.
Regards,
Steve
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