Final answer:
Voice tell is a method used to share track information quickly between two agencies using voice communications instead of slower written or digital methods.
Step-by-step explanation:
The purpose of voice tell is to enable an exchange of track information between two agencies via voice communications in lieu of written or digital data transfer methods such as email, instant messaging, or other electronic means that might be used for coordinating airspace or managing flight paths. Voice tell is commonly used in aviation and military applications where quick verbal updates and confirmations are essential for the safe and efficient control of airspace and operations. By using voice communications, agencies can rapidly share and confirm information without the delay that may arise from written messages being sent, received, and interpreted.