Hang up and Sign off

Hang up verb - Cause to be hanging or suspended.

Sign off and hang up are semantically related. in resign topic. In some cases you can use "Sign off" instead a verb "Hang up", when it comes to topics like give up responsibility.

Sign off verb - Cease broadcasting; get off the air; as of radio stations.

Hang up and sign off are semantically related. Sometimes you can use "Hang up" instead a verb "Sign off".