Call Queue Wrapuptime Agent ready?

Hello,

I am using AgentLogin to log the users at a call center into a Queue. The agent is given up to 3 mins to wrap up the call after the caller has disconnected. However in many cases the agent is done wrapping up the call after only 1 min. How do I tell asterisk that the agent is done wrapping up the call? For example we would like the agent to press a key say * to notify the queue that the agent is ready for the next call.