I would like to know if it is possible to have sipsorcery, or perhaps another (preferably free) service pick up the call and press "9" when it is from a particular number. I live in a community that has access via a gate system which requires a call to be placed to a resident to open. Once the resident picks up they need to press "9" to open the gate. In some cases I would like to be able to program my phone to automatically press "9" when that call is received.
Any suggestions are welcome!