[Freeswitch-users] Unreliable DTMF

[Steve Underwood]

The carriers pretty much had to do this. Back when IVR meant PC + 
Dialogic card + SCO Unix + application it was very very easy to end up 
not actually answering the calls, especially when using T1RBS. Most 
people had no idea their app was not answering the calls until the telco 
complained.

Regards,
Steve

On 09/13/2013 01:28 AM, 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 at 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
>