Almost by accident, I’ve realized the troubled dtmf problem with Google Voice now seems resolved, but not sure since when. When I walk my dog around my neighborhood, my Google Voice ‘trunk’ at my Asterisk based home pbx is being tested from my cell phone. My home pbx setup based on Nerd Vittle’s PIAF (Pbx-in-a-flash) distribution takes my GV DID to one of my extension which already has a voice-mail capability. When I’m outside house, the extension will take GV call, prompting to leave messages and also presenting more options like deleting, rewinding messages using dtmf tones. Previously, the dtmf tones got blocked by Google by some unknown reasons. But not any more! So, I’m thinking about GV powered mini-IVR setup (Interactive Voice Response?) to my taste. Thanks, Google!