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<div class="moz-cite-prefix">On 09/25/2012 09:26 AM, Bryant
Zimmerman wrote:<br>
</div>
<blockquote cite="mid:4253f1b8$74548bd$1735d5aa$@zktech.com"
type="cite"><span style="font-family: Arial, Helvetica,
sans-serif; font-size: 10pt">Jeff<br>
<br>
Can you please clarify your layout? If you have an asterisk 1.8
(I would use 10 for this if possible) server why can't you just
take the gateway call on that via a sip trunk. If you are coming
in from and land line and want to do t.38 to the asterisk 1.8
server you would need a FXO t.38 gateway. Based on your
description I am not sure what your sources are and what your
final desired destination is. Please be specific with your
response. We do t.38 all the time and have great success with
it but the success is in the setup and control of the endpoints
(gateways and ATAs)<br>
<br>
<div>Thanks<br>
<br>
Bryant Zimmerman (ZK Tech Inc.)<br>
616-855-1030 Ext. 2003</div>
<br>
<br>
<span style="font-family: tahoma,arial,sans-serif; font-size:
10pt;">
<hr align="center" size="2" width="100%">
<b>From</b>: "Jeff LaCoursiere" <a class="moz-txt-link-rfc2396E" href="mailto:jeff@sunfone.com"><jeff@sunfone.com></a><br>
<b>Sent</b>: Monday, September 24, 2012 9:20 PM<br>
<b>To</b>: "Asterisk Users Mailing List - Non-Commercial
Discussion" <a class="moz-txt-link-rfc2396E" href="mailto:asterisk-users@lists.digium.com"><asterisk-users@lists.digium.com></a><br>
<b>Subject</b>: [asterisk-users] T.38 gateway ATA</span><br>
<br>
<br>
Hoping for some clarification. I would like to setup a NORMAL
(not <br>
T.38) fax machine on an ATA, and have the ATA be a T.38 gateway
to a <br>
remote asterisk (1.8) server, which is doing T.38 relay
(passthru) to a <br>
provider.<br>
<br>
Some amount of googling today seems to imply that most ATAs are
just <br>
T.38 passthru devices, and expect a T.38 capable fax machine,
otherwise <br>
just fallback to ulaw (and mostly fail, in my experience so
far).<br>
<br>
So does anyone use an ATA that actually does the gateway
transcoding to <br>
a normal fax machine? Or am I barking up the wrong tree?<br>
<br>
Thanks!<br>
<br>
j<br>
<br>
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</blockquote>
<br>
Hi Bryan,<br>
<br>
To follow an inbound fax call, our intended setup would be:<br>
<br>
Our upstream sends a T.38 call to our border asterisk (1.8) server,
which creates another T.38 call to the customer's hosted asterisk
(1.8) instance, which creates another T.38 call to the ATA, which is
over the Internet to their location. The ATA would do the
transcoding (is that even the appropriate term in this case?) to
T.30, to the FXS connected normal fax machine.<br>
<br>
Its that last bit that I am having trouble confirming is a feature
of any mainstream ATA. When I dug into it yesterday it seems that
the mainstream ATAs will passthru T.38, expecting the connected fax
machine to work with T.38 natively. I can't depend on that. The
asterisk servers are all remote, and though I could presumably do
the gateway on the asterisk server I would then have a ulaw fax call
over the internet to the ATA, which in my experience has not been
very reliable.<br>
<br>
Of course I will need outbound faxing to follow the reverse path,
letting the ATA turn the T.30 outbound fax call into T.38, which
travels through our various asterisk servers to the upstream
provider...<br>
<br>
So in a nutshell, is there anyone using an ATA as the *gateway*
rather than passthru? I feel I am still not being clear... does
that help?<br>
<br>
Thanks,<br>
<br>
j<br>
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