They are installing the intercom at my neighbours' next door.
Ana doesn't answer the intercom, she's probably left already.
intercom /ˈɪntəkɒm; US / noun [countable] a system of communication by radio or telephone inside an office, plane, etc.; the device you press or switch on to start using this system ▶ telefon wewnętrzny interkom
Englisch Wort "domofon"(intercom) tritt in Sätzen auf: