JP,<br><br>The two end points have to agree on an RTP protocol.<br>You may look at the SDP in the initial INVITEs to see if T.38 is offered and if it is, remove it.<br>Also if the re-INVITE contains G711 along with the T.38 you should be able to just remove the T.38.<br>
That should accomplish the same effect as the customer disabling T.38.<br><br>FYI: FaxBack has a very reliable T.38 implementation
NET SatisFAXtion that we have been using for quite some time.<br><br>Dave<br><br><div class="gmail_quote">On Sun, Mar 6, 2011 at 1:52 PM, Iņaki Baz Castillo <span dir="ltr"><<a href="mailto:ibc@aliax.net">ibc@aliax.net</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">2011/3/6 Jeff Pyle <<a href="mailto:jpyle@fidelityvoice.com">jpyle@fidelityvoice.com</a>>:<br>
<div class="im">> Unfortunately the customer cannot disable T.38. I'd like to be able to<br>
> reject the reinvite with a send_reply("488", "Not acceptable here") within<br>
> the loose_route() section. Is this legit, or am I going to break things,<br>
> like getting the two endpoints' CSeqs out of sync?<br>
<br>
</div>You are not going to break CSeq at all. The proxy is able to reject<br>
in-dialog requests depending on local policy. When the UA receives 488<br>
it does know that, in case of a new in-dialog request, it must use a<br>
greater CSeq, which of course will be valid in the other UA (it must<br>
be just higher than previous one, no matter how much higher).<br>
<br>
But in your case, the problem is that when your UA receives the 488 it<br>
will probably send a BYE (it's the usual policy when a re-INVITE is<br>
rejected). But you can try it. You will not break SIP protocol at all.<br>
<font color="#888888"><br>
--<br>
Iņaki Baz Castillo<br>
<<a href="mailto:ibc@aliax.net">ibc@aliax.net</a>><br>
<br>
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