Integrating 4-wire intercom with Smart Things?

I’m very new to all this, so please bear with me. I have a suite in a mixed use building, and we have a 4-wire intercom. I want to see if I can add a momentary switch to the current intercom so that I can, for instance, set up a time window for the janitorial staff or other visitors, and when they buzz the intercom for my suite, the intercom “door” button automatically buzzes and lets them in. I don’t know if that’s feasible, and I am not tech-savvy enough to write up the code for myself, so getting a starting point is basically where I am at this point. Thanks in advance for any help you can provide!