I found this old intercom at an estate sale a few weeks ago. This week I took the insides of an Amazon Dash Wand and put them in to the intercom. Now when I press the talk button I can ask Alexa questions or control my home automation items such as the tv and thermostat.
For more details check out the guide at Instructables – https://www.instructables.com/id/Alexa-Powered-Intercom/
Theres also a video on YouTube