Phone surveys are a common method used to gather data.

I left a message on the answer phone.

I have two house phones in my living room.

I need to buy a new house phone.

The office has multiple answer phones for different departments.

The entry phones in the apartment building were not working.

The entry-phones in the apartment building were not working properly.

I buzzed the entry phone to let them know I was here.

I buzzed the entry-phone to let them know I was here.

I installed a door phone at my front gate for added security.