I am getting one-way DTMF working with Gizmo/SIPPhone and Asterisk v1.4. The calls connect, audio is good both ways, but when I dtmf from the phone on the Asterisk side, nothing comes across to Gizmo. When I DTMF from the Gizmo client, I get it on the Asterisk.
I have my [general] setting for sip.conf set to ‘dtmfmode=rfc2833’, so it should be working as per the knowledgebase. Any ideas?
Without this, the new Grandcentral feature of going via Gizmo to my softphone and Asterisk won’t fly, as of course I can not answer a Grandcentral call without DTMF.