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T.38 is a codec in exactly the same way that GSM or G.729 is a codec,
so yes it <i>can</i> be used at the same time as any other codec -
just that only <i>one</i> codec will be used at a time. What often
happens is that the call will initially be established with a codec
such as G.729 or G.711a, but once fax tones are detected the call will
change codecs to T.38.<br>
<br>
According to the release notes for 1.6.0-b4...<br>
<br>
<pre wrap=""> - 11873, Added core API changes to handle T.38 origination and termination
(The version of app_fax in Asterisk-addons now supports this.)
</pre>
<br>
This should be all that is necessary to run a T.38 gateway.<br>
<br>
<br>
Steve Underwood wrote:
<blockquote cite="mid:47BFCB4C.3040805@coppice.org" type="cite">
<pre wrap="">Rob Hillis wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Not unless you're running CallWeaver or Asterisk 1.6.0-beta4. Asterisk
has had passthrough support for T.38 for a while (somewhere in 1.4 it
became available IIRC) but is currently completely incapable of
terminating or encoding a fax call to T.38.
</pre>
</blockquote>
<pre wrap=""><!---->I thought * was still not capable for T.38 gateway operation. Doesn't
beta 4 just added T.38 termination? And, I believe it misses out some
key elements of doing that properly. Note that T.38 termination is an
addon, so it can't be used with, say, G.729.
</pre>
<blockquote type="cite">
<pre wrap="">The only real option available at the moment is to keep one PSTN line on
an ATA with an FXO port and T.38 support available and direct calls from
the fax machines through to it. However, I should point out that while
I believe this should be possible, I haven't actually tried it myself.
</pre>
</blockquote>
<pre wrap=""><!---->Steve
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