A process for interfacing with an electronic communications device including a single input interface (SII) for accessing an electronic digital assistant and voice control includes detecting a first activation of the SII, and responsively playing back a first audio feedback indicative of activation of a voice input function. Then monitoring for one of two or more pre-configured voice control keywords, a first associated with a local electronic communications device function and a second associated with initiating a particular infrastructure-based electronic digital assistant function. When the first, playing back a second audio feedback indicative of acknowledgement of a local device function, and performing the local device function; when the second, playing back, a third audio feedback indicative of acknowledgement of a infrastructure-based electronic digital assistant function, and performing the infrastructure-based electronic digital assistant function.