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. - Jeff On Thu, Sep 12, 2013 at 4:11 PM, Alex Lake <alex@digitalmail.com> wrote:
Interesting! I always thought that pre-answer was B->A audio path only, and often didn't work on mobiles at all.
On 12/09/2013 18:28, Michael Jerris wrote:
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.
On Sep 12, 2013, at 1:04 PM, Avi Marcus <avi@avimarcus.net> wrote:
Oh. I think it's written somewhere on the wiki that DTMF during pre_answer is unpredictable, it sometimes works and sometimes doesn't... -Avi
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