What action is indicated by the abbreviation X21?

The abbreviation X21 is commonly understood within law enforcement and dispatch communication to mean "Call Station/office by phone." This designation is utilized to instruct officers or personnel to reach out to their police department or agency's communication center for additional information, clarification, or to report a situation that may require direct communication.

By using X21, officers can efficiently relay the need for a phone call, ensuring that critical information is maintained and that proper procedures are followed in handling ongoing situations. Understanding these abbreviations and codes is vital for effective communication among law enforcement personnel, as it promotes clarity and expedites responses in various scenarios.

In contrast, the other options represent different actions that may not relate to the specific need for a phone call to the station, such as requests for assistance or disregard notifications. Knowing the precise meaning of these codes helps streamline operations and enhances response effectiveness in the field.