<div dir="ltr">AT&T in the US is a classic offender. For example, call their conferencing service at 800-232-1234. You've got to get through at least one level of digit-pressing before the call actually connects. Sometimes several.<div class="gmail_extra">
<div><div dir="ltr"><div>
<br></div><div><br></div><div>- Jeff</div><div><br></div></div></div>
<br><br><div class="gmail_quote">On Thu, Sep 12, 2013 at 4:11 PM, Alex Lake <span dir="ltr"><<a href="mailto:alex@digitalmail.com" target="_blank">alex@digitalmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Interesting! I always thought that pre-answer was B->A audio path only,<br>
and often didn't work on mobiles at all.<br>
<div><div class="h5"><br>
On 12/09/2013 18:28, Michael Jerris wrote:<br>
> Depends on the carrier, FreeSWITCH itself has no issues with it.. some/many carriers block it to avoid people running ivrs before answer to avoid toll charges.<br>
><br>
><br>
> On Sep 12, 2013, at 1:04 PM, Avi Marcus <<a href="mailto:avi@avimarcus.net">avi@avimarcus.net</a>> wrote:<br>
><br>
>> Oh. I think it's written somewhere on the wiki that DTMF during pre_answer is unpredictable, it sometimes works and sometimes doesn't...<br>
>> -Avi<br>
><br>
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> No virus found in this message.<br>
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</div>> Version: 2012.0.2242 / Virus Database: 3222/6160 - Release Date: 09/12/13<br>
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