Hi, I have configured the 2 level IVR. First level is Welcome Message and Second level is for Language selection. IVR perfectly works fine from the GSM mobile devices and PBX connected PSTN devices however the issue seems to be from the PSTN directly connected to home/offices. IVR menu option doesn’t recognized when pressed from these devices and repeat the Welcome Message time and again.
Service provider informed me to check the DTMF and codec and below is the dtmf setting
I am not getting the concrete solution as service provider tells to fix this issue from our side. They have also suggested to maintain the power gain from 0-25 db but I couldn’t find those setup in asterisk system as it is available in PBX box device.