Definition of the word call in

The phrase "call in" is a phrasal verb in the English language that is used to indicate the action of contacting someone by telephone or any other method of communication, typically to request or provide information or assistance. This idiomatic expression has its origins in the days of landline telephones when people would "call in" to a central office or Switchboard (Switching Station) to connect incoming calls to their designated phone number or extension within an organization. This term was gradually adopted by everyday language usage as a way to describe any situation where someone is summoned or required to join a conversation or meeting either in person or virtually. Currently, "call in" is commonly used in various contexts, such as remote work settings or Conference calls, where participants dial in to a virtual meeting using Audio or Video Conferencing software, eliminating the need for them to be physically present in the same location.