I hope someone can point me in the right direction. I have been learning Asterisk as a retirement hobby (strictly at home) and recently decided to go live connecting to the PTSN with a TDM410 card. I find that when I dial into some external IVRs (a local phone company) the dtmf information is not received by that IVR. In other cases the IVR (a bank) does receive the dtmf.
Any pointers as to where I should be looking would be appreciated.
I am running Asterisk 11.6cert11 with the aforementioned TDM410 using dahdi 2.10.2