I've actually got one that I can't figure out...
When someone comes to my apartments, they push a number in the gate keypad, it calls my phone, and I am required to push the number 9 for it to open the gate. I want to make it to where any time I receive a call from that number, it does that process for me.
I just can't seem to find the ability to push the number nine while in a call. Any tips?
The only thing I can think of is to have Tasker answer the call, then use the Music Play action to play a recording of the "9" DTMF tone. Unfortunately, I just tried it and the caller can't hear it at all, with or without speakerphone on.
Scratch that, I tried using the Call action with the number "9", and that didn't work either.
But this I haven't tried (requires that you use Google Voice for your voicemail, but doesn't involve Tasker at all):
Have Android forward calls from this number directly to voicemail. Setup a custom greeting for that number, where the greeting is a recording of the "9" DTMF tone. If it works you may also be able to set it up so that calls from that number can't leave voicemail, so you don't get your voicemail clogged with empty messages.