>>1774323>Have people really never used an intercom before? Never buzzed in to an apartment or office?Never seen an intercom where you have to hold down the button. You push the button to ring the bell, and then the connection is permanent for as long as the other side has the receiver off the hook. Are you thinking of CB radios or something? Because the average person has lots of experience with door intercoms and zero experience with CB radios, and it would be RATHER FUCKING RETARDED to design a train intercom like a CB radio.
