A quote from the Inception movie:
Cobb: Fischer, you'll be going with him.
Fischer: All right. What about you?
Cobb: You keep this live. I'll be listening for the whole time.
What does you keep this live mean in that context? Fischer asked about what route Cobb was going go by and to me, the answer as You keep this live seems a bit unclear in the context. Couldn't you explain that?