Gemalto is now part of the Thales Group, find out more.

You are here

DTMF Decoding | Thales IoT Developer Community

May 10, 2016 - 3:57pm, 2476 views

Hi,

I try to decode DTMF signals on a Cinterion PH8-P modem during a voice call:

1.Enable event reporting:

at^sind="dtmf",1,2,0

2. Doing a MO voice call

atd+49******;

3. Sending DTMF signals from the called phone/modem

In the standard audio mode detection rate is poor. When I switch to audio mode 6 via

at^snfs=6

detection rate becomes much better. Are there other audio settings which can have effects on DTMF decoding?

Thanks in advance,

Michael