Call up and Get back to

Call up verb - Get or try to get into communication (with someone) by telephone.

Get back to and call up are semantically related in telephone topic. In some cases you can use "Get back to" instead a verb "Call up", when it comes to topics like communicate through telephone system.

Call up and get back to are semantically related in telephone topic. Sometimes you can use "Call up" instead a verb "Get back to", if it concerns topics such as communicate through telephone system.